Intelligent heat-exchange machine set

A technology of intelligent heat exchange units and heat exchangers, which is applied in the direction of heat exchanger types, indirect heat exchangers, heat exchange equipment, etc., can solve the problems of complex control, large footprint, and no electronic control system, etc., to achieve safety Good performance, low manufacturing cost and simple structure

Inactive Publication Date: 2009-09-23
TIANJIN HUANENG ENERGY EQUIP
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AI-Extracted Technical Summary

Problems solved by technology

These heat exchange units often only connect heat exchangers, circulating water pumps, make-up water pumps, etc. with pipelines, without an electronic control system. When the equipment is running, professional operators need to monitor it from time to time, and it occupies a large area and is com...
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Abstract

The invention provides an intelligent heat-exchange machine set, which comprises a steam inlet, a heat exchanger, a water-circulating pump, a water-replenishing pump, a water-replenishing box, a backwater port, a water-supply port and a condensed-water outlet, wherein the steam inlet is connected with the heat exchanger through an electric regulating valve; an exhaust pipe and a drain valve are arranged on the heat exchanger; one end of the circulating pump is connected with the heat exchanger, and the other end of the circulating pump is connected with a backwater pipe; two ends of the backwater pipe are connected with the water-replenishing pump and the backwater port respectively; and the input ends of the electric regulating valve and the water-replenishing pump are connected with the output end of a control circuit board. The machine set has the advantages that: 1, the machine set can perform unattended automatic operation, automatic water replenishing and automatic alarming through the control technology of the control circuit board; 2, the machine set is simple in structure and good in safety performance; 3, the machine set is small in volume and low in manufacturing cost; and 4, the machine set can realize constant-temperature heat supply.

Application Domain

Stationary tubular conduit assembliesHeat exchange apparatus

Technology Topic

Condensed waterEngineering +6

Image

  • Intelligent heat-exchange machine set
  • Intelligent heat-exchange machine set
  • Intelligent heat-exchange machine set

Examples

  • Experimental program(1)

Example Embodiment

[0012] An intelligent heat exchange unit includes a steam inlet 17, a shell-and-tube heat exchanger 13, a circulating water pump 12, a make-up pump 3, a make-up tank 1, a water return port 10, a water supply port 18, and a condensate water outlet 19. The steam inlet is connected to the heat exchanger through an electric regulating valve 14, and an exhaust pipe 15 and a drain valve 16 are installed on the heat exchanger. One end of the circulating pump is connected to the heat exchanger, and the other end is connected to the return pipe 7 through the check valve 8. One end of the return pipe 7 is connected to the make-up pump through the elbow 6 and the butterfly valve 4. The make-up pump is connected to the flange 2 The water supply tank is connected, and the other end is connected to the water return port 10 through a butterfly valve 9. The input end of the electric regulating valve and the input end of the make-up pump are connected with the output end of the control circuit board. The above-mentioned control circuit board adopts SDC digital servo circuit.
[0013] The working process of the present invention is: using 0.1-0.8MPa steam as a heat source, using a shell-and-tube heat exchanger to exchange steam and water, and adopting advanced control to open and close the steam to achieve the purpose of constant temperature water supply. Steam enters the shell-and-tube heat exchanger through a pipeline with an electric regulating valve. When the water temperature (feedback signal) reaches the set temperature (input signal), the thermal resistance installed on the unit will weaken 4- The 20 mA current is input to the signal processing circuit to convert the analog signal into a digital signal, and then the digital signal is sent to the digital processing system for processing, and then the processed digital signal is output to the logic signal discrimination circuit to discriminate open or closed valves The signal required by the circuit, which is processed by the anti-vibration circuit for damping, and then is driven by the drive circuit to close the electric regulating valve to prevent steam from entering the heat exchanger. When the water temperature (feedback signal) is lower than the set temperature (input signal), repeat the above process, open the electric regulating valve, so that the steam enters the heat exchanger again to work, realizing constant temperature water supply.
[0014] This unit can also achieve automatic water supply or frequency conversion water supply to ensure the normal operation of the system. At the same time, it can realize automatic alarm and automatic stop operation.

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Description & Claims & Application Information

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