CN204128034U - A kind of central heating system that primary water is recycled - Google Patents
A kind of central heating system that primary water is recycled Download PDFInfo
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- CN204128034U CN204128034U CN201420610114.3U CN201420610114U CN204128034U CN 204128034 U CN204128034 U CN 204128034U CN 201420610114 U CN201420610114 U CN 201420610114U CN 204128034 U CN204128034 U CN 204128034U
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Abstract
The utility model provides a kind of central heating system that primary water is recycled, comprise user, heat exchange station, open cell, a secondary net feed pipe and a secondary net return pipe, described user is connected to heat exchange station and open cell successively, one secondary net feed pipe and a secondary net return pipe are through open cell, described heat exchange station comprises heat transmission equipment, frequency conversion force (forcing) pump one and frequency conversion force (forcing) pump two, described heat transmission equipment connects frequency conversion force (forcing) pump one, and described heat exchange station entrance installs frequency conversion force (forcing) pump two additional; Described open cell arranges three control, after water supply valve, install control valve additional, and adds 90 ° of elbows at new open pipe mouth.The utility model return water temperature is low, large for difference of rising again, and the conveying capacity of central heating system is improve more than 25%, improve for system central heating efficiency, heat energy is made full use of, energy-conserving and environment-protective simultaneously, cost-saving, construction period is short, has very important realistic meaning.
Description
Technical field
The utility model relates to central heating system, is specifically related to a kind of central heating system that primary water is recycled.
Background technology
Point out in " Chinese cogeneration of heat and power industry market prediction is reported with investment strategy planning application ", by 2015, China's cogeneration of heat and power installation scale will reach 2.5 hundred million kilowatts, and heating power reaches 1.25 hundred million kilowatts, and Areas benefiting from central heating will reach 10,000,000,000 square meters.In prior art, central heating system as shown in Figure 2, there is following defect: (1) open cell is Double tube, after former water supply valve, do not have control valve, and can not realize primary water becomes thermal source, not stood interior control for water regulating valve; (2) heat exchange station entrance does not fill frequency conversion force (forcing) pump; (3) open pipe mouth does not add 90 ° of elbows, has microcirculation to produce; (4) plate type heat exchanger, a secondary side flow velocity is asymmetric, reduces heat exchange efficiency.In sum, central heating system practical operation situation in prior art, supply water temperature is generally at about 120 DEG C, return water temperature at about 55-60 DEG C, the even arrival had more than 70 DEG C, return water temperature is high, supply back to have a narrow range of temperature, conveying capacity is limited, and system central heating efficiency is low, and heat energy can not make full use of.
Summary of the invention
The utility model provides a kind of central heating system that primary water is recycled, and overcomes prior art return water temperature high, and supply back to have a narrow range of temperature, conveying capacity is limited, and system central heating efficiency is low, and heat energy can not make full use of, the defect of not energy-conserving and environment-protective.
The utility model adopts following technical scheme:
A kind of central heating system that primary water is recycled, comprise user, heat exchange station, open cell, a secondary net feed pipe and a secondary net return pipe, described user is connected to heat exchange station and open cell successively, one secondary net feed pipe and a secondary net return pipe are through open cell, described heat exchange station comprises heat transmission equipment, frequency conversion force (forcing) pump one and frequency conversion force (forcing) pump two, described heat transmission equipment connects frequency conversion force (forcing) pump one, and described heat exchange station entrance installs frequency conversion force (forcing) pump two additional; Described open cell arranges three control, after water supply valve, install control valve additional, and only need simple primary water opening, just can realize primary water is thermal source, for control in water regulating valve station; Add 90 ° of elbows at new open pipe mouth, to pull open new interface and former water return outlet pressure reduction, avoid microcirculation to produce.
Described frequency conversion force (forcing) pump one and frequency conversion force (forcing) pump two pump selection principle overcome plate type heat exchanger and branch line on-way resistance, regulates pump head, make pressure reduction between return pipe two opening be not more than 1 meter water column, to guarantee that large net hydraulic regime does not affect by force (forcing) pump.
Described heat transmission equipment is full-welding plate-type heat exchanger or symmetrical detachable plate type heat exchanger, and the utility model is started with from adjustment one secondary side flow velocity, from actual operating mode, optimizes plate type heat exchanger design and operation, thus substantially increases the efficiency of plate type heat exchanger.The utility model optimizes plate type heat exchanger following scheme:
Scheme 1: all use primary water, selects full-welding plate-type heat exchanger.
Design condition: primary side confession/return water temperature T
1=60 DEG C, T
2=41 DEG C; Primary side pressure of supply water P=2.0Mpa; Secondary side confession/return water temperature t
1=40 DEG C, t
2=55 DEG C; Secondary side pressure of supply water P=2.0Mpa;
Thermic load Q=2500KW;
Scheme 2: all use primary water, selects symmetrical detachable plate type heat exchanger.
Design condition: primary side confession/return water temperature T
1=60 DEG C, T
2=51 DEG C; Primary side pressure of supply water P=2.0Mpa; Secondary side confession/return water temperature t
1=50 DEG C, t
2=58 DEG C; Secondary side pressure of supply water P=2.0Mpa;
Thermic load Q=2500KW;
Scheme 3: use temperature as thermal source, selects symmetrical detachable plate type heat exchanger heat exchange after 55-60 DEG C of primary water mixes with a high-grade hot water.This programme flow process and option A, B are identical, and be also option A, B additional project, when primary water flow can not meet secondary water-supply temperature requirement, thermal source adopts primary water blending high-grade once to supply water;
Design condition: primary side confession/return water temperature T
1=60 DEG C, T
2=41 DEG C; Primary side pressure of supply water P=2.0Mpa; Secondary side confession/return water temperature t
1=40 DEG C, t
2=55 DEG C; Secondary side pressure of supply water P=2.0Mpa;
Thermic load Q=2500KW;
Design condition after blending is once supplied water (flow is 7.62t/h): primary side confession/return water temperature T
1=65 DEG C, T
2=41 DEG C; Primary side pressure of supply water P=2.0Mpa; Secondary side confession/return water temperature t
1=40 DEG C, t
2=60 DEG C; Secondary side pressure of supply water P=2.0Mpa.Wherein, blending water supply flow 7.62t/h, for normally supplying 15% of heat flow, blending once water supply heat accounts for total load 28%.
Above three schemes, all can meet and reduce primary water temperature, improve the requirement of central heating system conveying capacity.Three schemes should consider utilization according to actual conditions, because user's character of the system of each thermal substation, locus and heat exchanger proterties etc. are different, so before thermal substation technological transformation, and must design targetedly.
Control principle of the present utility model is: using secondary heating leaving water temperature as the control point controlling primary side pump capacity, when primary side flow reaches metered flow, when still can not meet secondary leaving water temperature, system is automatically enabled a high-order thermal source and is supplemented, and automatically closes when not needing supplementary.
The beneficial effects of the utility model are:
The utility model passes through technological transformation, primary water (55 ~ 60 DEG C) is again utilized in heat exchange station, its temperature can be down to about 40 DEG C, about 75 DEG C are brought up to by central heating system supply backwater temperature difference, return water temperature is low, large for difference of rising again, the conveying capacity of central heating system is improve more than 25%.Improve for system central heating efficiency, heat energy is made full use of, energy-conserving and environment-protective simultaneously, cost-saving, construction period is short, has very important realistic meaning.
Accompanying drawing explanation
Fig. 1 for described in primary water is recycled central heating system structural representation;
Fig. 2 is prior art central heating system structure structural representation.
Description of reference numerals
1 user; 2 heat exchange stations; 21 heat transmission equipments; 22 frequency conversion force (forcing) pumps one; 23 frequency conversion force (forcing) pumps two; 3 open cell; 31 control valves; 4 one secondary net feed pipes; 5 one secondary net return pipes; 6 users one; 7 heat transmission equipments one; 8 one secondary net feed pipes one; 9 one secondary net return pipes one; 10 frequency conversion force (forcing) pumps three.
Detailed description of the invention
The utility model is further illustrated below in conjunction with accompanying drawing and embodiment of the present utility model.
Embodiment 1
As shown in Figure 1, a kind of central heating system that primary water is recycled, comprise user 1, heat exchange station 2, open cell 3, one secondary net feed pipe 4 and a secondary net return pipe 5, described user 1 is connected to heat exchange station 2 and open cell 3 successively, one secondary net feed pipe 4 and a secondary net return pipe 5 are through open cell 3, described heat exchange station 2 comprises heat transmission equipment 21, frequency conversion force (forcing) pump 1 and frequency conversion force (forcing) pump 2 23, described heat transmission equipment 21 connects frequency conversion force (forcing) pump 1, and described heat exchange station 2 entrances install frequency conversion force (forcing) pump 2 23 additional; Described open cell 3 arranges three control, installs control valve 31 after water supply valve additional, and only need simple primary water opening, just can realize primary water is thermal source, and control valve 31 is stood interior control; And adding 90 ° of elbows at new open pipe mouth, to pull open new interface and former water return outlet pressure reduction, avoid microcirculation to produce.
Described frequency conversion force (forcing) pump 1 and frequency conversion force (forcing) pump 2 23 selection principle only overcome plate type heat exchanger and branch line on-way resistance, regulates pump head, make pressure reduction between return pipe two opening be not more than 1 meter water column, to guarantee that large net hydraulic regime does not affect by force (forcing) pump.
Described heat transmission equipment 21 is full-welding plate-type heat exchanger or symmetrical detachable plate type heat exchanger, the utility model is started with from adjustment one secondary side flow velocity, from actual operating mode, optimize plate type heat exchanger design and operation, thus substantially increase the efficiency of plate type heat exchanger, optimize plate type heat exchanger design and operation scheme as follows:
Whole use primary water, selects full-welding plate-type heat exchanger.
Design condition: primary side confession/return water temperature T
1=60 DEG C, T
2=41 DEG C; Primary side pressure of supply water P=2.0Mpa; Secondary side confession/return water temperature t
1=40 DEG C, t
2=55 DEG C; Secondary side pressure of supply water P=2.0Mpa;
Thermic load Q=2500KW.
Embodiment 2
As shown in Figure 1, a kind of central heating system that primary water is recycled, comprise user 1, heat exchange station 2, open cell 3, one secondary net feed pipe 4 and a secondary net return pipe 5, described user 1 is connected to heat exchange station 2 and open cell 3 successively, one secondary net feed pipe 4 and a secondary net return pipe 5 are through open cell 3, described heat exchange station 2 comprises heat transmission equipment 21, frequency conversion force (forcing) pump 1 and frequency conversion force (forcing) pump 2 23, described heat transmission equipment 21 connects frequency conversion force (forcing) pump 1, and described heat exchange station 2 entrances install frequency conversion force (forcing) pump 2 23 additional; Described open cell 3 arranges three control, installs control valve 31 after water supply valve additional, and only need simple primary water opening, just can realize primary water is thermal source, and control valve 31 is stood interior control; And adding 90 ° of elbows at new open pipe mouth, to pull open new interface and former water return outlet pressure reduction, avoid microcirculation to produce.
Described frequency conversion force (forcing) pump 1 and frequency conversion force (forcing) pump 2 23 selection principle only overcome plate type heat exchanger and branch line on-way resistance, regulates pump head, ensures that between return pipe two opening, pressure reduction is not more than 1 meter water column, to guarantee that large net hydraulic regime does not affect by force (forcing) pump.
Described heat transmission equipment 21 is full-welding plate-type heat exchanger or symmetrical detachable plate type heat exchanger, the utility model is started with from adjustment one secondary side flow velocity, from actual operating mode, optimize plate type heat exchanger design and operation, thus substantially increase the efficiency of plate type heat exchanger, optimize plate type heat exchanger design and operation scheme as follows:
Whole use primary water, selects symmetrical detachable plate type heat exchanger
Design condition: primary side confession/return water temperature T
1=60 DEG C, T
2=51 DEG C; Primary side pressure of supply water P=2.0Mpa; Secondary side confession/return water temperature t
1=50 DEG C, t
2=58 DEG C; Secondary side pressure of supply water P=2.0Mpa;
Thermic load Q=2500KW;
Embodiment 3
As shown in Figure 1, a kind of central heating system that primary water is recycled, comprise user 1, heat exchange station 2, open cell 3, one secondary net feed pipe 4 and a secondary net return pipe 5, described user 1 is connected to heat exchange station 2 and open cell 3 successively, one secondary net feed pipe 4 and a secondary net return pipe 5 are through open cell 3, described heat exchange station 2 comprises heat transmission equipment 21, frequency conversion force (forcing) pump 1 and frequency conversion force (forcing) pump 2 23, described heat transmission equipment 21 connects frequency conversion force (forcing) pump 1, and described heat exchange station 2 entrances install frequency conversion force (forcing) pump 2 23 additional; Described open cell 3 arranges three control, installs control valve 31 after water supply valve additional, and only need simple primary water opening, just can realize primary water is thermal source, and control valve 31 is stood interior control; And adding 90 ° of elbows at new open pipe mouth, to pull open new interface and former water return outlet pressure reduction, avoid microcirculation to produce.
Described frequency conversion force (forcing) pump 1 and frequency conversion force (forcing) pump 2 23 selection principle only overcome plate type heat exchanger and branch line on-way resistance, regulates pump head, make pressure reduction between return pipe two opening be not more than 1 meter water column, to guarantee that large net hydraulic regime does not affect by force (forcing) pump.
Described heat transmission equipment 21 is full-welding plate-type heat exchanger or symmetrical detachable plate type heat exchanger, the utility model is started with from adjustment one secondary side flow velocity, from actual operating mode, optimize plate type heat exchanger design and operation, thus substantially increase the efficiency of plate type heat exchanger, optimize plate type heat exchanger design and operation scheme as follows:
With temperature after 55-60 DEG C of primary water mixes with a high-grade hot water as thermal source, select symmetrical detachable plate type heat exchanger heat exchange.This programme flow process and option A, B are identical, and be also option A, B additional project, when primary water flow can not meet secondary water-supply temperature requirement, thermal source adopts primary water blending high-grade once to supply water.
Design condition: primary side confession/return water temperature T
1=60 DEG C, T
2=41 DEG C; Primary side pressure of supply water P=2.0Mpa; Secondary side confession/return water temperature t
1=40 DEG C, t
2=55 DEG C; Secondary side pressure of supply water P=2.0Mpa;
Thermic load Q=2500KW.
Design condition after blending is once supplied water (flow is 7.62t/h): primary side confession/return water temperature T
1=65 DEG C, T
2=41 DEG C; Primary side pressure of supply water P=2.0Mpa; Secondary side confession/return water temperature t
1=40 DEG C, t
2=60 DEG C; Secondary side pressure of supply water P=2.0Mpa.Wherein, blending water supply flow 7.62t/h, for normally supplying 15% of heat flow, blending once water supply heat accounts for total load 28%.
Above three schemes, all can meet and reduce primary water temperature, improve the requirement of central heating system conveying capacity, three schemes should consider utilization according to actual conditions.Due to the system of each thermal substation, user's character, locus, heat exchanger proterties etc. are different, so before thermal substation technological transformation, must targeted design.
The utility model passes through technological transformation, primary water (55 ~ 60 DEG C) is again utilized in heat exchange station, its temperature can be down to about 40 DEG C, about 75 DEG C are brought up to by central heating system supply backwater temperature difference, return water temperature is low, large for difference of rising again, the conveying capacity of central heating system is improve more than 25%.Improve for system central heating efficiency, heat energy is made full use of, energy-conserving and environment-protective simultaneously, cost-saving, construction period is short, has very important realistic meaning.
The above, be only the utility model preferred embodiment, therefore can not limit the scope of the utility model enforcement according to this, and the equivalence namely done according to the utility model the scope of the claims and description changes and modifies, and all should still belong in the scope of the utility model lid.
Claims (3)
1. the central heating system that primary water is recycled, comprise user, heat exchange station, open cell, a secondary net feed pipe and a secondary net return pipe, described user is connected to heat exchange station and open cell successively, one secondary net feed pipe and a secondary net return pipe are through open cell, it is characterized in that: described heat exchange station comprises heat transmission equipment, frequency conversion force (forcing) pump one and frequency conversion force (forcing) pump two, described heat transmission equipment connects frequency conversion force (forcing) pump one, and described heat exchange station entrance installs frequency conversion force (forcing) pump two additional; Described open cell arranges three control, after water supply valve, install control valve additional, and is adding 90 ° of elbows at new open pipe mouth.
2. the central heating system that primary water is recycled according to claim 1, is characterized in that: described frequency conversion force (forcing) pump one and frequency conversion force (forcing) pump two make pressure reduction between water pipe two opening be not more than 1 meter water column.
3. the central heating system that primary water is recycled according to claim 1, is characterized in that: described heat transmission equipment is full-welding plate-type heat exchanger or symmetrical detachable plate type heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420610114.3U CN204128034U (en) | 2014-10-21 | 2014-10-21 | A kind of central heating system that primary water is recycled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420610114.3U CN204128034U (en) | 2014-10-21 | 2014-10-21 | A kind of central heating system that primary water is recycled |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204128034U true CN204128034U (en) | 2015-01-28 |
Family
ID=52384387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420610114.3U Expired - Fee Related CN204128034U (en) | 2014-10-21 | 2014-10-21 | A kind of central heating system that primary water is recycled |
Country Status (1)
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|---|---|
| CN (1) | CN204128034U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588160A (en) * | 2014-10-21 | 2016-05-18 | 程宝华 | Central heating system enabling primary return water to be reutilized |
| CN112344415A (en) * | 2015-11-04 | 2021-02-09 | 瑞典意昂公司 | Local thermal energy consumer assembly and local thermal energy generator assembly for a district thermal energy distribution system |
-
2014
- 2014-10-21 CN CN201420610114.3U patent/CN204128034U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588160A (en) * | 2014-10-21 | 2016-05-18 | 程宝华 | Central heating system enabling primary return water to be reutilized |
| CN112344415A (en) * | 2015-11-04 | 2021-02-09 | 瑞典意昂公司 | Local thermal energy consumer assembly and local thermal energy generator assembly for a district thermal energy distribution system |
| CN112344415B (en) * | 2015-11-04 | 2021-11-26 | 瑞典意昂公司 | Local thermal energy consumer assembly and local thermal energy generator assembly for a district thermal energy distribution system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20151021 |
|
| EXPY | Termination of patent right or utility model |