RU2160873C1 - Regulator device - Google Patents

Abstract

FIELD: heat supply systems. SUBSTANCE: regulator device designed for heat supply systems with cascade lift has pumping equipment of heat generator, pumping equipment inlet and outlet lines. return line connecting upper level heat consumer with pumping equipment, and regulator connected to pressure pipeline between pumping equipment and heat consumer inlet. Regulator has hydraulic turbine with fixed guide vane assembly and flow rate control valve mounted behind hydraulic turbine in direction of heat carrier flow, simular regulator being installed in return line. Invention provides possibility of partial return of work used for overcoming piezometric head in straight pipeline and work taken for building pressure differential in straight pipeline and at heat consumer instruments. EFFECT: saving of work. 1 dwg

Description

 The invention relates to the field of heating and heating networks and is intended primarily for heat supply systems when using a heat carrier with a cascade lift.

 Heat supply of settlements and cities is usually carried out from a heat source - CHP or boiler houses through heating networks. Thermal networks by the type of coolant are divided into steam and water.

 According to the number of lines, water heating network systems are divided into single-pipe - dead-end, in which the coolant does not return to the heat producer, two-pipe and multi-tube periodically or continuously operating, in which the coolant returns to the heat source, as well as open, closed and independent.

 Thermal power plants and boiler houses, according to known conditions, are usually located at the lowest geodetic level of the terrain. The difference in vertical geodetic marks between the consumer and the heat producer leads to the appearance of a piezometric pressure between them. To overcome the piezometric pressure and pressure losses in the heating networks, network pumps are installed at the heat source, the operation of which consumes significant energy consumption. With significant piezometric pressures in the direct supply pipe, it is necessary to use two or more cascade lifting of the coolant to the consumer.

 In continuously operating multi-tube circulating systems of thermal water networks with constant and variable modes of operation in the return pipe — at the heat source — a pressure equal to the piezometric pressure plus the necessary pressure from boiling of the coolant is set. To ensure the technical characteristics of the heat source equipment, the possibility of dumping the heat carrier from all heat consumers into a common collector, with significant piezometric pressure, a regulating device is installed on the return pipe to reduce consumption in compliance with SNiP and the "Rules for the technical operation of heating networks." The regulating device, mainly for heat supply systems with a cascade lift, may include coolant pumping equipment, a pump equipment inlet and outlet line, a return line connecting the upper level heat consumer to the pump equipment, a regulator connected to the pressure pipe between the pump equipment and the heat consumer inlet. An example of such a device, see the book E.Ya. Sokolova. Heating and heating networks. M ..: Energy, 1975, p. 62, fig. 3-4.

 In the devices under consideration, the piezometric pressure is constant due to the immutability of the vertical geodetic marks of the heat producer and heat consumer. In a temporary operating mode, a variable can only be a qualitative change in the coolant - flow rate. On the control device, the required flow rate is regulated and the excess pressure is triggered due to throttling. The same situation occurs with significant pressure drops in the direct pipe and the permissible pressure on the heat consumer's devices. In this case, the control device is installed on the supply pipe from the heat source to the heat consumer. It is quite obvious that the work spent on overcoming the piezometric pressure in the direct pipeline and during throttling of the heat carrier from the supply pipe to the heat consumer is irretrievably lost.

 The objective of the invention is a partial return of the work spent on overcoming the piezometric pressure in the direct pipe, and the work spent on creating the pressure drop in the direct pipe and the heat consumer devices.

 The problem is solved due to the fact that in the control device, mainly for heat supply systems with a cascade lift, containing pumping equipment of the heat producer, an input and output line of pumping equipment, a return line connecting the upper-level heat consumer to the pumping equipment, a regulator connected to the pressure pipe between pumping equipment and the input of the heat consumer, while the regulator consists of a hydraulic turbine with a fixed guide apparatus and a control valve stroke, sequentially disposed in the direction of water turbine for coolant flow, and in the same reverse link set knob.

 The drawing shows a diagram of a multi-tube water heating system, where consumers are at different vertical geodetic marks of NA, NB, HB.

The control device contains heat consumers A, B, C, pumping equipment I, II, III, groups of control valves 1, 2, 3, 4, hydraulic turbines T1, T2, flow control valves 5, 6
Piezometric pressure for all consumers is different. If the generated pressure by the pumping equipment of the heat source is not enough to heat the consumer "B", then a cascade method of supplying the heat carrier to the consumer is created. The pumping equipment of the heat source should provide, according to this scheme, the necessary pressure before the II rise and the flow rate of the heat carrier to consumers A, B, C. The pumping equipment of the II rise should provide the necessary parameters of the heat carrier at the III rise. Pumping equipment of the third lift should provide the necessary parameters of the heat carrier at the consumer and the excess pressure in the pipeline from boiling of the coolant.

 The options for connecting the heat consumer according to the scheme can be very different, but the requirement for the minimum permissible pressure before the pump equipment of the heat producer should remain constant.

 The device is able to work both in constant and in variable modes. With a constant mode of operation, the hydraulic turbine is calculated for the maximum throughput of the coolant, with a stationary guide apparatus, and the necessary pressure drop with the flow control valve fully open. The maximum power is removed from the hydraulic turbine shaft, in this case.

 In a variable mode of operation, the amount of coolant passed through the turbine, with a fixed guide apparatus, is regulated by a control valve, and therefore, the power removed from the turbine is regulated. The speed of the coolant in the flowing part of the hydraulic turbine decreases, but the picture of the flow of the coolant in the flowing part of the hydraulic turbine does not change, and there may be some decrease in efficiency. In case of emergency and for the period of repair work, a bypass line with control valves 1, 4 is provided.

 The power removed from the hydraulic turbine shaft can be used to drive mechanical equipment (pumps, blowers, etc.), or for any other purpose.

 This invention can be used in any circulating systems - open, closed and independent, where, due to technical necessity, a pressure drop occurs.

Claims (1)

 A control device, mainly for heat supply systems with a cascade lift, comprising pumping equipment of a heat producer, an input and output line of pumping equipment, a return line connecting the upper-level heat consumer to pumping equipment, a regulator connected to a pressure pipe between the pumping equipment and the heat consumer input, characterized in that the regulator consists of a hydraulic turbine with a fixed guide apparatus and a flow control valve placed in series of water turbine in the direction of coolant flow, and in the same reverse link set knob.