CN209840234U - Intelligent plate type heat exchange system - Google Patents

Abstract

The utility model discloses intelligent plate type heat exchange system belongs to intelligent plate type heat exchange system technical field; the technical problem to be solved is as follows: providing an intelligent plate type heat exchange system; the technical scheme for solving the technical problem is as follows: the system comprises a pipeline main valve, wherein a water inlet of the pipeline main valve is connected with a soft water tank, a water outlet of the pipeline main valve is connected with a water inlet pipeline of a unit, a multi-path circulating pump is connected to the water inlet pipeline of the unit in parallel, a water outlet of the circulating pump is connected with a water inlet of a plate heat exchanger, and a water outlet of the plate heat exchanger is connected with a user side; a water replenishing pump frequency conversion device is also arranged on the outer side of the plate heat exchanger; flow control valves are arranged on the water inlet pipeline of the unit and the water outlet of the plate heat exchanger; the base of the unit is also provided with an intelligent variable frequency control cabinet, and the signal output end of the intelligent variable frequency control cabinet is respectively connected with the signal control ends of the circulating pump, the plate heat exchanger, the water replenishing pump variable frequency device and the flow control valve through leads; the utility model discloses be applied to heating heat supply place.

Description

Intelligent plate type heat exchange system

Technical Field

The utility model discloses board-like heat transfer system of intelligence belongs to the board-like heat transfer system technical field of intelligence.

Background

When a common large-scale heat exchange station is designed and selected, the power of a circulating pump is designed with a certain surplus flow, when frequency conversion automatic control is carried out, the surplus power can be saved, particularly, the energy-saving effect of a high-power circulating pump with the power of more than 30KW is very obvious, according to actual measurement data, the circulating pump of the large-scale heat exchange station basically meets the heating requirement when working at about 40HZ, the power saving rate of the circulating pump is about 20-50%, and the energy-saving effect is obvious; however, the currently used heat exchange system lacks the energy-saving effect of variable frequency control of a circulating pump, wastes a large amount of heat sources, and is not beneficial to energy conservation and environmental protection; on the other hand, the heat exchange system used at present requires the monitoring of the staff on duty in order to keep stable operation, the staff needs to manually control the action state of each valve and pump in the system, the workload is large, each staff needs to train for a long time to go on duty, a large amount of manpower time is consumed, but the effect of monitoring the operation system is still not ideal.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome not enough that exists among the prior art, the technical problem that will solve is: the improvement of the structure of the intelligent plate type heat exchange system is provided; in order to solve the technical problem, the utility model discloses a technical scheme be: the intelligent plate type heat exchange system comprises a pipeline main valve uniformly arranged on a unit base, wherein a water inlet of the pipeline main valve is connected with a soft water tank, a water outlet of the pipeline main valve is connected with a unit water inlet pipeline, a plurality of circulating pumps are connected to the unit water inlet pipeline in parallel, water outlets of the circulating pumps are connected with a water inlet of a plate type heat exchanger, and a water outlet of the plate type heat exchanger is connected with a user side;

a water replenishing pump frequency conversion device is also arranged on the outer side of the plate heat exchanger;

flow control valves are arranged on the unit water inlet pipeline and the water outlet of the plate heat exchanger;

the unit base is also provided with an intelligent variable frequency control cabinet, and the signal output end of the intelligent variable frequency control cabinet is respectively connected with the signal control ends of the circulating pump, the plate heat exchanger, the water replenishing pump variable frequency device and the flow control valve through leads;

and the peripheries of the circulating pump, the plate heat exchanger and the water replenishing pump frequency conversion device are respectively provided with a temperature sensor and a flow sensor, and the signal output ends of the temperature sensor and the flow sensor are connected with an intelligent frequency conversion control cabinet.

And a filtering dirt remover and a temperature control device are also arranged between the soft water tank and the pipeline main valve.

And a fault alarm diagnosis module and a communication module are also arranged in the intelligent variable frequency control cabinet.

The utility model discloses beneficial effect for prior art possesses does: the utility model discloses with plate heat exchanger, the circulating pump, the moisturizing pump, intelligent variable frequency control cabinet, the temperature control device, various sensors, the pipeline, the valve is integrated as an organic whole, unified composite mount is on the unit base, make steam or high-temperature water under the control of temperature control valve, make the primary side heat source (steam, high-temperature water) get into plate heat exchanger according to the required flow of heating system, carry out indirect heat exchange with the secondary side circulating water, then return to the primary side return water pipe network, the secondary side circulating return water is after the circulating pump pressurization, get into plate heat exchanger and carry out indirect heat exchange with the primary side heat source, then get into the secondary side supply network, the moisturizing constant pressure pump is automatic to the secondary side return water pipe network moisturizing constant pressure, maintain whole heat exchange system; the utility model discloses compact structure, area is little, and operational reliability is high, possesses unmanned on duty self-operation function, maintains the running cost low, can use widely in the unit area that needs heating heat supply.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a schematic structural view of the present invention;

in the figure: 1 is pipeline main valve, 2 is soft water tank, 3 is the unit inlet channel, 4 is the circulating pump, 5 is plate heat exchanger, 6 is moisturizing pump frequency conversion device, 7 is the flow control valve, 8 is intelligent variable frequency control cabinet.

Detailed Description

As shown in fig. 1, the utility model discloses intelligent plate-type heat exchange system, including unifying the pipeline main valve 1 that sets up on the unit base, the water inlet of pipeline main valve 1 links to each other with soft water tank 2, the delivery port of pipeline main valve 1 connects unit inlet channel 3, connect with multichannel circulating pump 4 on the unit inlet channel 3, the delivery port of circulating pump 4 all links to each other with the water inlet of plate heat exchanger 5, the delivery port of plate heat exchanger 5 links to each other with the user;

a water replenishing pump frequency conversion device 6 is also arranged on the outer side of the plate type heat exchanger 5;

flow control valves 7 are arranged on the unit water inlet pipeline 3 and the water outlet of the plate heat exchanger 5;

an intelligent variable frequency control cabinet 8 is further arranged on the unit base, and a signal output end of the intelligent variable frequency control cabinet 8 is respectively connected with signal control ends of the circulating pump 4, the plate heat exchanger 5, the water replenishing pump variable frequency device 6 and the flow control valve 7 through leads;

and the peripheries of the circulating pump 4, the plate heat exchanger 5 and the water replenishing pump frequency conversion device 6 are respectively provided with a temperature sensor and a flow sensor, and the signal output ends of the temperature sensor and the flow sensor are connected with an intelligent frequency conversion control cabinet 8.

And a filtering dirt remover and a temperature control device are also arranged between the soft water tank 2 and the pipeline main valve 1.

And a fault alarm diagnosis module and a communication module are also arranged in the intelligent variable frequency control cabinet 8.

The utility model discloses use heat transfer unit special control cabinet as the control unit, the staff sets up intelligent variable frequency control cabinet, can predetermine the regulation and control to the action of each valve in the heat transfer system, pump, the discharge that each sensor will monitor simultaneously, control unit is returned in the isoparametric feedback of temperature, the switch board carries out adaptability to whole system work module again and adjusts, finally realize whole heat transfer system unmanned on duty normal work, make heat transfer system more energy-conserving, heat conversion efficiency is higher.

The water replenishing pump frequency conversion device 6 has a frequency conversion constant-pressure water replenishing function, and a user can control the water replenishing pressure to be stable through presetting control parameters, so that the water replenishing pump frequency conversion device has a function of automatically switching a standby pump at regular time, and the standby pump is prevented from being rusted for a long time; the water replenishing pump has a dynamic and static pressure water replenishing pressure automatic control function, can set two water replenishing pressures of dynamic pressure and static pressure, automatically switches when a circulating pump is started and stopped, has a water replenishing tank water shortage automatic protection function, automatically stops the pump when the water replenishing tank water shortage occurs, prevents the water replenishing pump from idling, controls the water replenishing pump to automatically drain water when detecting that the pressure in a pipeline exceeds a threshold value, and can automatically open a pressure relief electromagnetic valve to relieve pressure when the thermal expansion of a system exceeds overpressure.

The circulating pump 4 is controlled by adopting frequency conversion pressure, the rotating speed of the circulating pump is automatically adjusted according to the water supply pressure and the backwater pressure difference or the water supply pressure of the secondary network, the outlet pressure or the backwater supply pressure difference of the secondary network is stable, the control system can control the automatic operation of three circulating pumps at most, when one circulating pump cannot meet the water supply pressure or flow requirement of the secondary network, the system automatically switches the first circulating pump from a frequency conversion state to a power frequency state, then the second circulating pump is started to work in a frequency conversion mode, and when the full-load operation of the two pumps cannot meet the system requirement, the third pump is started to work in a frequency conversion mode in sequence; when the heat load of the external network is reduced, the system stops the circulating pump which is started in sequence, the pressure stability of the external network is ensured, the variable flow automatic regulation function of the secondary network is realized, the automatic energy-saving effect is achieved, the variable frequency control technology is adopted, the starting and stopping of the high-power circulating pump are controlled by the frequency converter, the surge impact to a power supply network is avoided, the pressure impact to a heat supply network is avoided, the damage rate of pipeline valves is effectively reduced, the capacity requirement of a power transformer of a heat exchange station is greatly reduced, and the investment and the maintenance cost are saved.

The utility model discloses according to the valve aperture of the water circulation temperature automatic control primary network flow control valve of secondary net export, guarantee that secondary net export temperature is stable, outdoor temperature compensation control function has, can be according to the change of outdoor temperature, automatically regulated secondary net export temperature, it is higher when outdoor temperature, secondary net export temperature is lower more, outdoor temperature is lower more, secondary net export temperature is higher more, can be on intelligent variable frequency control cabinet 8 manual regulation control flow control valve aperture, also can set up to the control of time quantum, set for interval energy-saving mode through the man-machine interface.

The utility model additionally arranges a data communication module in the intelligent frequency conversion control cabinet, so that the intelligent frequency conversion control cabinet has the remote transmission function of monitoring data, a control system can be provided with an RS485 remote data communication interface, at most 61 heat exchange station data ports can be hung on the same line of a computer through the communication interface, each station is distinguished by arranging different station numbers, and the data exchange with an upper computer can be conveniently carried out; when an upper computer is equipped, the operating parameters of the heat exchange unit can be remotely monitored, data recording can be automatically carried out according to set time, the historical operating data of the heat exchange unit can be inquired at any time on the computer, the historical operating data of the heat exchange unit can be printed, the historical temperature and pressure of printing can be described on the computer, the operation condition of the heat exchange unit can be conveniently analyzed and mastered, and faults can be analyzed and solved.

The utility model discloses still be provided with failure alarm diagnosis module in addition, possess sensor trouble suggestion and control protect function, support to show prompt facility, pressure sensor broken string system protect function to temperature sensor short circuit and broken string chinese character, the system can automatic check pressure sensor broken string state, prevents that system's moisturizing pressure from too high causing the damage to pipe network and user heating equipment.

The automatic fault diagnosis function is exemplified as follows: when the overpressure protection system of the water replenishing pump exceeds the set pressure, the water replenishing pump automatically stops pumping

After the circulating pump and the water replenishing pump are in failure, the standby pump is automatically switched to ensure the normal operation of the system; the water-supply tank is lack of water and alarms, the water-supply pump is automatically stopped when the water-supply tank is lack of water, and the water-supply pump is automatically recovered after normal operation; the overtemperature alarm system automatically closes the regulating valve when exceeding the set temperature, so that the temperature of the circulating water of the system is normal.

Before the utility model is used, a user should be configured with related staff for monitoring, and the water, electricity and gas users start the machine after the water and electricity in the heat exchange station are ready; before starting the plate heat exchanger, all switches of a circulating pump, a water replenishing pump, an electric regulating valve and the like on a control instrument cabinet are arranged at manual positions;

then, injecting water into the soft water tank, simultaneously emptying to ensure that the system is fully filled with water and reaches a designed static pressure value, controlling a circulating pump to run in a trial mode, and checking whether the unit has leakage caused by transportation or installation and whether the detection parameters of each pressure temperature sensor are abnormal;

and then the secondary pipe network system slowly heats up: manually opening an electric regulating valve on a primary pipeline, manually and slowly opening a shut-off valve on a primary network to ensure that the secondary network is stably and slowly heated until the water supply temperature of the secondary network reaches a set temperature, enabling the unit to be in full-load operation, and operating the baking machine;

when the system is shut down, the sequence of shutting down and starting up is as follows: if the unit is under automatic control, the shutdown can be automatically carried out according to a program; if the unit is in a manual operation mode, the sequence of stopping and starting is as follows: the electric control valve of the primary network is turned off firstly, the circulating pump is stopped after time delay, the circulating pump is operated firstly when the machine is started, and the electric control valve of the primary network is opened in a time delay manner.

The heat exchanger unit of the utility model is generally in an automatic operation state, less human intervention is needed, and the recording work of historical data is only needed to be done according to relevant operation regulations; the recorded data includes the following operating parameters: the operating temperature, pressure, flow etc. of a secondary network, the current voltage of the motor of water pump etc. field operation have the abnormal nothing, whether water pump noise is normal, whether the temperature is normal, emergency treatment condition of emergency.

When the unit equipment is in a non-operation state, all valves on the equipment are turned off, the drain valve is opened, media in the unit are emptied, and the power supply of the control instrument cabinet is disconnected, so that the service life of the equipment system can be effectively prolonged.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (3)

1. Board-like heat transfer system of intelligence, its characterized in that: the device comprises a pipeline main valve (1) uniformly arranged on a base of the unit, wherein a water inlet of the pipeline main valve (1) is connected with a soft water tank (2), a water outlet of the pipeline main valve (1) is connected with a unit water inlet pipeline (3), a plurality of circulating pumps (4) are connected to the unit water inlet pipeline (3) in parallel, water outlets of the circulating pumps (4) are connected with a water inlet of a plate type heat exchanger (5), and a water outlet of the plate type heat exchanger (5) is connected with a user side;

a water replenishing pump frequency conversion device (6) is arranged on the outer side of the plate type heat exchanger (5);

flow control valves (7) are arranged on the unit water inlet pipeline (3) and the water outlet of the plate heat exchanger (5);

an intelligent variable frequency control cabinet (8) is further arranged on the unit base, and the signal output end of the intelligent variable frequency control cabinet (8) is respectively connected with the signal control ends of the circulating pump (4), the plate heat exchanger (5), the water replenishing pump variable frequency device (6) and the flow control valve (7) through leads;

and temperature sensors and flow sensors are arranged on the peripheries of the circulating pump (4), the plate heat exchanger (5) and the water replenishing pump frequency conversion device (6), and signal output ends of the temperature sensors and the flow sensors are connected with an intelligent frequency conversion control cabinet (8).

2. The intelligent plate heat exchange system of claim 1, wherein: a filtering dirt remover and a temperature control device are also arranged between the soft water tank (2) and the pipeline main valve (1).

3. The intelligent plate heat exchange system of claim 2, wherein: and a fault alarm diagnosis module and a communication module are also arranged in the intelligent variable frequency control cabinet (8).