CN208620424U - A kind of big temperature difference heat-exchange system - Google Patents
A kind of big temperature difference heat-exchange system Download PDFInfo
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- CN208620424U CN208620424U CN201820716280.XU CN201820716280U CN208620424U CN 208620424 U CN208620424 U CN 208620424U CN 201820716280 U CN201820716280 U CN 201820716280U CN 208620424 U CN208620424 U CN 208620424U
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Abstract
The utility model provides a kind of big temperature difference heat-exchange system, including magnetic suspension heat pump unit, first-class heat exchanger and secondary heat exchanger, the first-class heat exchanger are connected with secondary heat exchanger by pipeline, and forms first circulation circuit for return piping with primary net；The first-class heat exchanger is connected with magnetic suspension heat pump unit by pipeline, and forms second circulation circuit for return piping with secondary network, is supplied water to primary net and is once cooled down, and is heated up for secondary network water supply；The secondary heat exchanger connect to form third circulation loop by pipeline with magnetic suspension heat pump unit, supplies water and is cooled down twice to primary net.The utility model significantly increases the temperature difference of primary net supply and return water temperature, and 30% or more area of heat-supply service can be improved in the not increased situation of main pipeline network in 35% or more the heat conveying capacity of pipe network；Low grade residual heat, which is recycled, for power plant creates advantage.
Description
Technical field
The utility model relates to Heat Supply Engineering technical field, specifically a kind of big temperature difference heat-exchange system can be extensive
It is applied in central heating field.
Background technique
North city scale rapid development, heating area expand year by year at present, and heating pipe network pressure is very big.City heat supply
Water water temperature of pipe network is at 90 DEG C or more, and for return water temperature at 50 DEG C or more, the supply and return water temperature of secondary network is 70/50 DEG C, and one
The return water heat load of 50 DEG C of secondary net or more is very big, is not utilized more fully, and the cooling after power plant to power plant is returned to
System is also very unfavorable.
On the one hand the utilization rate of urban heating network can be provided by increasing the heat supply temperature difference, make limited heating network supply more
Big area of heat-supply service；On the other hand reducing return water temperature can be improved power plant's cooling effect, effectively promote comprehensive electric generating efficiency, because
This improves the heat supply temperature difference by various modes, is always the major technique direction that Heat Supply Engineering technical field is inquired into.
Utility model content
The purpose of this utility model is to solve above-mentioned the deficiencies in the prior art, provides a kind of big temperature difference heat-exchange system.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of big temperature difference heat-exchange system, including magnetic suspension heat pump unit, first-class heat exchanger and secondary heat exchanger, the level-one
Heat exchanger is connected with secondary heat exchanger by pipeline, and forms first circulation circuit for return piping with primary net；The level-one
Heat exchanger is connected with magnetic suspension heat pump unit by pipeline, and forms second circulation circuit for return piping with secondary network, to one
Secondary net water supply is once cooled down, and is heated up for secondary network water supply；The secondary heat exchanger and magnetic suspension heat pump unit are logical
It crosses pipeline to connect to form third circulation loop, supplies water and be cooled down twice to primary net.
Preferably, the heat-exchange system further includes PLC controller, flow control valve, secondary network water circulating pump, secondary cycle
Pump and temperature sensor；
The PLC controller to temperature collection signal and controls flow control valve aperture, the frequency conversion control that secondary cycle pumps
The working condition of amount processed and magnetic suspension heat pump unit is mounted in the airborne control cabinet of magnetic suspension heat pump unit；
The flow control valve adjusts thermal energy input quantity, is mounted on primary net and supplies water to adjust primary net water supply flow
On pipeline；
The secondary network water circulating pump, to adjust the circulating water flow for entering magnetic suspension heat pump unit, adjusting is effectively changed
Heat is mounted on secondary network return piping；
The secondary cycle pump, to adjust the circulating water flow of third circulation loop, adjusts effective heat exchange amount, is mounted on
Third circulation loop enters on the pipeline of secondary heat exchanger；
The temperature sensor, to detect water temperature, simultaneously up-delivering signal is separately mounted to secondary network water supply to PLC controller
Pipeline, magnetic suspension heat pump unit and second level between pipeline, secondary network return piping, magnetic suspension heat pump unit and first-class heat exchanger
On pipeline between heat exchanger；
The flow control valve, temperature sensor, secondary cycle pump and magnetic suspension heat pump unit are electrical with PLC controller
Connection.
Preferably, the magnetic suspension heat pump unit includes evaporator and condenser, and first-class heat exchanger and condenser pass through pipe
Line series connection；Secondary heat exchanger is connect with evaporator；The evaporator is to absorb the circulating water heating after secondary heat exchanger exchanges heat
Amount, and pass to condenser；Condenser increases secondary network return water temperature to secondary network return water to discharge heat.
Further, the first-class heat exchanger include the first water inlet of first-class heat exchanger, the first water outlet of first-class heat exchanger,
The second water outlet of the second water inlet of first-class heat exchanger and first-class heat exchanger；The secondary heat exchanger include secondary heat exchanger first into
The mouth of a river, the second water outlet of the first water outlet of secondary heat exchanger, the second water inlet of secondary heat exchanger and secondary heat exchanger；The level-one
The first water inlet of heat exchanger is connect with primary net water supply line, and the first water outlet of first-class heat exchanger and secondary heat exchanger first are intake
Mouth is connected by pipeline, and the first water outlet of secondary heat exchanger is connect with primary net return piping.
Further, the condenser includes condenser inlet and condensator outlet, the condenser inlet and secondary network
Return piping connection, condensator outlet connect with the second water inlet of first-class heat exchanger, the second water outlet of first-class heat exchanger with it is secondary
The connection of net water supply line.
Further, the evaporator includes evaporator and evaporator outlet, and the evaporator outlet is changed with second level
Hot the second water inlet of device connection, evaporator are connect with the second water outlet of secondary heat exchanger.
Further, the flow control valve is electric butterfly valve.
Further, the magnetic suspension heat pump unit uses magnetic suspension centrifuge heat pump.
The utility model has the beneficial effects that
(1) temperature difference of primary net supply and return water temperature significantly increases, 35% or more the heat conveying capacity of pipe network, in main pipe
In the not increased situation of net, 30% or more area of heat-supply service can be improved.
(2) the utility model is that power plant's recycling low grade residual heat creates advantage.Since heat supply network return water temperature reduces
To 30 DEG C hereinafter, can be more easier to recycle plant condenser waste heat, to be established to improve power plant system efficiency of energy utilization
Fixed basis.
(3) magnetic suspension heat pump unit is mainly by evaporating and condensing two shell and tube exchangers and compressor set at structure is tight
It gathers, it is low noise, high-efficient, the 50% of only traditional lithium bromide chiller volume, it is easily installed, is suitble to the transformation of existing heat exchange station,
It does not need specially to increase the device space, improves the feasibility of heat exchange station reducing energy consumption.
Detailed description of the invention
A part of attached drawing for constituting the utility model is used to provide a further understanding of the present invention.In the accompanying drawings:
Fig. 1 is a kind of annexation figure of big temperature difference heat-exchange system of the utility model.
In figure: 1, magnetic suspension heat pump unit；101, evaporator；1011 evaporators；1012, evaporator outlet；102,
Condenser；1021, condenser inlet；1022 condensator outlets；2, first-class heat exchanger；201, the first water inlet of first-class heat exchanger；
202, the first water outlet of first-class heat exchanger；203, the second water inlet of first-class heat exchanger；204, the second water outlet of first-class heat exchanger；3,
Secondary heat exchanger；301, the first water inlet of secondary heat exchanger；302, the first water outlet of secondary heat exchanger；303, secondary heat exchanger
Two water inlets；304, the second water outlet of secondary heat exchanger；4, flow control valve；5, secondary network water circulating pump；6, secondary cycle pumps；
7, temperature sensor.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, a kind of big temperature difference heat-exchange system, including magnetic suspension heat pump unit 1, first-class heat exchanger 2 and second level are changed
Hot device 3, the magnetic suspension heat pump unit 1 include evaporator 101 and condenser 102, the first-class heat exchanger 2 and secondary heat exchanger
3 are connected by pipeline, and form first circulation circuit for return piping with primary net；The first-class heat exchanger 2 and condenser 102
It is connected by pipeline, and forms second circulation circuit for return piping with secondary network, supplied water to primary net and once cooled down, and
It heats up for secondary network water supply；The secondary heat exchanger 3 connect to form third circulation loop by pipeline with evaporator 101,
It supplies water and is cooled down twice to primary net.The evaporator 101 is to absorb the circulating water heating after the heat exchange of secondary heat exchanger 3
Amount, and pass to condenser 102；Condenser 102 increases secondary network return water temperature to secondary network return water to discharge heat,
Heat displacement is carried out after first-class heat exchanger 2, and pipeline water temperature is increased again and is conveyed to user through secondary network water supply line；First
Circulation loop, second circulation circuit and third circulation loop work at the same time.
The first-class heat exchanger 2 includes the first water inlet of first-class heat exchanger 201, the first water outlet of first-class heat exchanger 202, one
The second water inlet of grade heat exchanger 203 and the second water outlet of first-class heat exchanger 204；The secondary heat exchanger 3 includes secondary heat exchanger
First water inlet 301, the first water outlet of secondary heat exchanger 302, the second water inlet of secondary heat exchanger 303 and secondary heat exchanger second
Water outlet 304；First water inlet of first-class heat exchanger 201 is connect with primary net water supply line, and first-class heat exchanger first is discharged
Mouthfuls 202 are connect with the first water inlet of secondary heat exchanger 301 by pipeline, the first water outlet of secondary heat exchanger 302 with once net back
Water pipeline connection.
The condenser 102 includes condenser inlet 1021 and condensator outlet 1022, the condenser inlet 1021 with
The connection of secondary network return piping, condensator outlet 1022 are connect with the second water inlet of first-class heat exchanger 203, first-class heat exchanger second
Water outlet 204 is connect with secondary network water supply line.
The evaporator 101 includes evaporator 1011 and evaporator outlet 1012, the evaporator outlet 1012 with
The second water inlet of secondary heat exchanger 303 connects, and evaporator 1011 is connect with the second water outlet of secondary heat exchanger 304.
The heat-exchange system further includes PLC controller, flow control valve 4, secondary network water circulating pump 5,6 and of secondary cycle pump
Temperature sensor 7；
The PLC controller to temperature collection signal and carries out processing analysis, by a series of special algorithms, control
The frequency control amount of 4 aperture of flow control valve processed, secondary cycle pump 6, adjusts the running parameter of magnetic suspension heat pump unit 1, thus
Under the premise of safe operation, so that system is in optimum Working, keep the high energy efficiency ratio of system, be mounted on magnetic suspension heat pump
In the airborne control cabinet of unit 1；
The flow control valve 4, be electric butterfly valve, according to the supply and return water temperature of secondary network change, by PLC controller come
The input of computing system thermal energy, while primary net water supply flow is adjusted, thermal energy input quantity is adjusted, primary net water supply line is mounted on
On；
The secondary network water circulating pump 5 adjusts the frequency control amount of secondary network water circulating pump 5, and then adjusts and enter magnetcisuspension
The circulating water flow of superficial heat pump assembly 1 guarantees effective heat exchange amount, is mounted on secondary network return piping, secondary network water circulating pump 5
Frequency control amount be usually it is quantitative, be adjusted according to secondary network end subscriber service condition or synoptic climate situation；
The secondary cycle pump 6, according to the variation of secondary network supply and return water temperature and primary net water supply flow, will have a direct impact on
To the leaving water temperature of first-class heat exchanger 2, the circular flow of secondary heat exchanger 3 can also change therewith, by PLC controller calculating come
It determines that the frequency control amount of secondary cycle pump 6 guarantees effective heat exchange amount to adjust the circulating water flow of third circulation loop, pacifies
On the pipeline that third circulation loop enters secondary heat exchanger 3；
The temperature sensor 7, to detect water temperature, simultaneously up-delivering signal is separately mounted to secondary network confession to PLC controller
Pipeline, magnetic suspension heat pump unit 1 between water pipeline, secondary network return piping, magnetic suspension heat pump unit 1 and first-class heat exchanger 2
On pipeline between secondary heat exchanger 3；
The flow control valve 4, temperature sensor 7, secondary cycle pump 6 and magnetic suspension heat pump unit 1 are and PLC controller
It is electrically connected.
The magnetic suspension heat pump unit 1 uses magnetic suspension centrifuge heat pump, its main feature is that low noise, high-efficient, structure is tight
It gathers, is easily installed, be suitble to the transformation of existing heat exchange station, do not need specially to increase the device space, improve heat exchange station reducing energy consumption
Feasibility.
As shown in Figure 1, the system optimum Working: 90 DEG C of primary nets supply water and enter first-class heat exchanger 2 by pipeline, with
The secondary network return water that 48 DEG C are once warming up to by condenser 102 for entering first-class heat exchanger 2 simultaneously carries out heat displacement, once
Net supplies water flows out the secondary heat exchanger 3 that 50 DEG C of water enter big flow after heat is replaced, and secondary network return water flows after heat is replaced
The secondary network that temperature is 60 DEG C out supplies water, and secondary network supplies water to user's thermal losses, the secondary network return water of 45 DEG C of outflow；Second level
Heat exchanger 3 connect to form third circulation loop by pipeline with evaporator 101, flows out 20 DEG C of recirculated waters from evaporator 101 and enters
Secondary heat exchanger 3 flows out in 30 DEG C of recirculated waters to evaporator 101 after heat is replaced, 101 absorption cycle hydro-thermal of evaporator
Amount passes to condenser 102, and condenser 102 discharges heat and is once warming up to 48 DEG C to 45 DEG C of secondary network return water progress, once
Net supply water 50 DEG C of water after the displacement of first-class heat exchanger 2 enter 20 DEG C of recirculated waters that secondary heat exchanger 3 and evaporator 101 flow out into
After the displacement of row heat, the primary net return water of 25 DEG C of outflow.
Primary net water supply 50 DEG C of water of outflow after first-class heat exchanger 2 carries out heat displacement contain sizable heat load, directly
It connects and flows back to a pipe network unfortunately, the third circulation loop being made up of secondary heat exchanger 3 and evaporator 101, by evaporator
It is that magnetic suspension heat pump unit 1 provides low-temperature heat source, while 50 DEG C of water being replaced that 20 DEG C of recirculated waters, which are replaced as 30 DEG C of recirculated waters, in 101
It is flowed out at 25 DEG C of water.30 DEG C of optimum condition, that is, inflow temperature of evaporator 101,20 DEG C of leaving water temperature, COP (Energy Efficiency Ratio) can be with
Reach 8.2, count the power that secondary cycle pump 6 and secondary network water circulating pump 5 consume in, system energy efficiency can achieve 7.5, entirely change
The efficiency of hot systems can achieve 87%.According to the calculation of price of using energy source gradient, reuptaked in 2 return water of first-class heat exchanger
Heat is utilized, and has very high economic value.
Heat exchange end, that is, secondary network load be it is continually changing, PLC controller mainly passes through secondary network supply backwater temperature difference
It is calculated, is worked according to control flow control valve 4 is calculated, the adjusting of primary net water supply flow is so that system reaches thermal balance；
The adjusting of primary net water supply flow will have a direct impact on the leaving water temperature of first-class heat exchanger 2, and the circular flow of secondary heat exchanger 3 also can
Change therewith, system must determine the frequency control amount of secondary cycle pump 6, magnetic suspension heat pump machine by PLC controller calculating
The inside of group 1 also will do it adjustment by PLC controller, carries out self-balancing adjusting between each variable, makes magnetic suspension heat pump machine
Group 1 keeps optimum Working；PLC controller adjusts flow control valve 4, controls primary net by a series of special algorithms
3 flow of water supply flow and secondary heat exchanger adjusts 1 running parameter of magnetic suspension heat pump unit, thus under the premise of safe operation,
So that system is in optimum Working, keeps the high energy efficiency ratio of system.
Although the utility model is described in detail with reference to the foregoing embodiments, come for those skilled in the art
Say, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic into
Row equivalent replacement, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all
It is included within the scope of protection of this utility model.
Claims (8)
1. a kind of big temperature difference heat-exchange system, including magnetic suspension heat pump unit (1), first-class heat exchanger (2) and secondary heat exchanger (3),
The first-class heat exchanger (2) is connected with secondary heat exchanger (3) by pipeline, and forms first circulation for return piping with primary net
Circuit；The first-class heat exchanger (2) is connected with magnetic suspension heat pump unit (1) by pipeline, and linear for return pipe with secondary network
It at second circulation circuit, supplies water to primary net and is once cooled down, and heat up for secondary network water supply；The secondary heat exchanger
(3) it connect to form third circulation loop by pipeline with magnetic suspension heat pump unit (1), supplies water and be cooled down twice to primary net.
2. a kind of big temperature difference heat-exchange system according to claim 1, it is characterised in that: the heat-exchange system further includes PLC
Controller, flow control valve (4), secondary network water circulating pump (5), secondary cycle pump (6) and temperature sensor (7)；
The PLC controller, to temperature collection signal and control flow control valve (4) aperture, secondary cycle pump (6) frequency conversion
The working condition of control amount and magnetic suspension heat pump unit (1) is mounted in the airborne control cabinet of magnetic suspension heat pump unit (1)；
The flow control valve (4) adjusts thermal energy input quantity, is mounted on primary net and supplies water to adjust primary net water supply flow
On pipeline；
The secondary network water circulating pump (5) is adjusted effective to adjust the circulating water flow for entering magnetic suspension heat pump unit (1)
Heat exchange amount is mounted on secondary network return piping；
The secondary cycle pump (6) adjusts effective heat exchange amount, is mounted on to adjust the circulating water flow of third circulation loop
Third circulation loop enters on the pipeline of secondary heat exchanger (3)；
The temperature sensor (7), to detect water temperature, simultaneously up-delivering signal is separately mounted to secondary network water supply to PLC controller
Pipeline, magnetic suspension heat pump unit between pipeline, secondary network return piping, magnetic suspension heat pump unit (1) and first-class heat exchanger (2)
(1) on the pipeline between secondary heat exchanger (3)；
The flow control valve (4), temperature sensor (7), secondary cycle pump (6) and magnetic suspension heat pump unit (1) are controlled with PLC
Device processed is electrically connected.
3. a kind of big temperature difference heat-exchange system according to claim 1, it is characterised in that: the magnetic suspension heat pump unit (1)
Including evaporator (101) and condenser (102), first-class heat exchanger (2) is connected with condenser (102) by pipeline；Secondary heat exchange
Device (3) is connect with evaporator (101)；The evaporator (101) is to absorb the circulating water heating after secondary heat exchanger (3) heat exchange
Amount, and pass to condenser (102)；Condenser (102) makes secondary network return water temperature to secondary network return water to discharge heat
It increases.
4. a kind of big temperature difference heat-exchange system according to claim 3, it is characterised in that: the first-class heat exchanger (2) includes
The first water inlet of first-class heat exchanger (201), the first water outlet of first-class heat exchanger (202), the second water inlet of first-class heat exchanger (203)
With the second water outlet of first-class heat exchanger (204)；The secondary heat exchanger (3) includes the first water inlet of secondary heat exchanger (301), two
Grade the first water outlet of heat exchanger (302), the second water inlet of secondary heat exchanger (303) and the second water outlet of secondary heat exchanger (304)；
First water inlet of first-class heat exchanger (201) connect with primary net water supply line, the first water outlet of first-class heat exchanger (202) with
The first water inlet of secondary heat exchanger (301) is connected by pipeline, the first water outlet of secondary heat exchanger (302) and primary net return pipe
Line connection.
5. a kind of big temperature difference heat-exchange system according to claim 4, it is characterised in that: the condenser (102) includes cold
Condenser import (1021) and condensator outlet (1022), the condenser inlet (1021) connect with secondary network return piping, cold
Condenser outlet (1022) connect with the second water inlet of first-class heat exchanger (203), the second water outlet of first-class heat exchanger (204) with it is secondary
The connection of net water supply line.
6. a kind of big temperature difference heat-exchange system according to claim 4, it is characterised in that: the evaporator (101) includes steaming
Send out device import (1011) and evaporator outlet (1012), the evaporator outlet (1012) and the second water inlet of secondary heat exchanger
(303) it connects, evaporator (1011) is connect with the second water outlet of secondary heat exchanger (304).
7. a kind of big temperature difference heat-exchange system according to claim 2, it is characterised in that: the flow control valve (4) is electricity
Dynamic butterfly valve.
8. a kind of big temperature difference heat-exchange system according to claim 6, it is characterised in that: the magnetic suspension heat pump unit (1)
Using magnetic suspension centrifuge heat pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820716280.XU CN208620424U (en) | 2018-05-15 | 2018-05-15 | A kind of big temperature difference heat-exchange system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820716280.XU CN208620424U (en) | 2018-05-15 | 2018-05-15 | A kind of big temperature difference heat-exchange system |
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| Publication Number | Publication Date |
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| CN208620424U true CN208620424U (en) | 2019-03-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534208A (en) * | 2018-05-15 | 2018-09-14 | 济南金孚瑞供热工程技术有限公司 | A kind of big temperature difference heat-exchange system |
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2018
- 2018-05-15 CN CN201820716280.XU patent/CN208620424U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534208A (en) * | 2018-05-15 | 2018-09-14 | 济南金孚瑞供热工程技术有限公司 | A kind of big temperature difference heat-exchange system |
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