CN110274291B - Online water quality treatment system for primary heat supply network water and operation method thereof - Google Patents
Online water quality treatment system for primary heat supply network water and operation method thereof Download PDFInfo
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- CN110274291B CN110274291B CN201910453223.6A CN201910453223A CN110274291B CN 110274291 B CN110274291 B CN 110274291B CN 201910453223 A CN201910453223 A CN 201910453223A CN 110274291 B CN110274291 B CN 110274291B
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- heat supply
- water quality
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 169
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 239000012528 membrane Substances 0.000 claims description 6
- 238000001223 reverse osmosis Methods 0.000 claims description 3
- 238000000108 ultra-filtration Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000002455 scale inhibitor Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a primary heat supply network water online water quality treatment system and an operation method thereof, belonging to the field of energy utilization, wherein the system comprises a bypass pipeline, a valve, a booster pump, a heat exchanger, a water quality treatment device, a second valve, a third valve, a fourth valve, a fifth valve, a first low-pressure heater, a condensate pump and a condenser; the first valve, the booster pump, the heat exchanger, the water quality treatment device and the second valve are sequentially arranged on the bypass pipeline according to the flow direction of the heat supply network water, the hot end inlet of the heat exchanger is connected with the booster pump, and the hot end outlet of the heat exchanger is connected with the water quality treatment device; the invention reasonably designs the on-line water quality treatment system of the primary heat supply network water, and by using the invention, the on-line treatment of the primary heat supply network water quality can be realized, and the safe and stable operation and the service life of the central heating system are greatly improved, so that the invention has higher practical application value.
Description
Technical Field
The invention belongs to the field of energy utilization, and particularly relates to a primary heat supply network water online water quality treatment system and an operation method thereof.
Background
With the development of town and the requirement of clean heating, central heating has basically replaced regional small boiler room heating, and becomes a main form of winter heating in northern areas of China. Meanwhile, with the development of heat supply technology, a centralized heat supply system initially develops toward diversification of heat sources and complexity of pipe networks.
The central heating system is one kind of heat supply system comprising heat source, primary net, heat exchange station and secondary net and with water as heat transferring medium. The heat supply pipe network system is complex and is often buried, wherein the primary pipe network is basically distributed under municipal roads of various large cities, so that the pipe network is very difficult to overhaul. The quality of the heat supply network water in the heat supply system directly influences the safe operation of the heat source, the service life of the pipe network and the heat supply quality.
Because the primary pipe network is longer, the primary heat supply network has larger water capacity, the cost is higher if the water after softening treatment is poured, and the water quality is poorer because the pipe network generally runs untreated tap water after construction and operation due to the construction period. In the later operation process, the water quality is gradually optimized by continuously supplementing the treated water, or the scale inhibitor is added, so that the stable operation of the heating system is prevented from being influenced by a large amount of scale. However, because the heat supply network is a closed pipeline, the heat supply network can be replenished only after water loss; the manner in which the scale inhibitor is added is only temporarily alleviated and other contamination is brought about. Therefore, in a longer period of operation time, the water quality of primary heat supply network water can not meet the requirement, and the service life and safe and stable operation of the whole heat supply system are greatly influenced.
In order to effectively improve the water quality and optimize the operation of a heating system, it is necessary to provide a method for online water quality treatment of primary heat supply network water in a closed pipeline.
Disclosure of Invention
Based on the above situation, the invention overcomes the defects existing in the prior art and aims to provide a primary heat supply network water online water quality treatment system and an operation method thereof.
The invention solves the problems by adopting the following technical scheme: the primary heat supply network water online water quality treatment system is characterized by comprising a bypass pipeline, a first valve, a booster pump, a heat exchanger, a water quality treatment device, a second valve, a third valve, a fourth valve, a fifth valve, a first low-pressure heater, a condensate pump and a condenser; the bypass pipeline is connected with the primary network water return pipeline, the first valve, the booster pump, the heat exchanger, the water quality treatment device and the second valve are sequentially arranged on the bypass pipeline according to the flow direction of the heat supply network water, the hot end inlet of the heat exchanger is connected with the booster pump, and the hot end outlet of the heat exchanger is connected with the water quality treatment device; the condenser is connected with an inlet of the condensate pump through a pipeline, an outlet of the condensate pump is connected with a third valve and the first low-pressure heater respectively, the third valve is connected with a cold end inlet of the heat exchanger, a cold end outlet of the heat exchanger is connected with a fourth valve and a fifth valve respectively, the fourth valve is connected with an inlet of the first low-pressure heater, and the fifth valve is connected with an outlet of the first low-pressure heater.
Further, the heat exchanger may be connected in series or in parallel with the first low pressure heater.
Furthermore, the bypass pipeline sequentially introduces the primary heat supply network water into the booster pump and the heat exchanger, the heat supply network water enters the water quality treatment device after being boosted and cooled to meet the working requirement of the water quality treatment device, the primary heat supply network water is subjected to water quality treatment on line, and the primary heat supply network water is introduced into the primary heat supply network water return pipeline after being subjected to water quality treatment.
Furthermore, after the dead steam is condensed by the condenser, part of condensed water flows into the heat exchanger to exchange heat after being pressurized by the condensate pump, and the condensed water after temperature rise is introduced into the front of the first low-pressure heater or the rear of the first low-pressure heater according to the temperature of the condensed water.
Further, the water quality treatment device comprises a pretreatment module, an ultrafiltration membrane module and a reverse osmosis membrane module, and the water treatment module is reasonably selected and configured according to the water index condition of the primary heat supply network.
The operation method of the primary heat supply network water online water quality treatment system is characterized by comprising the following steps of:
when the water quality of the primary heat supply network water is unqualified, opening a first valve and a second valve, and treating the water quality of the heat supply network water through a bypass pipeline;
when the temperature of the heat supply network backwater is lower at the initial end of heating, and when the temperature of the heat supply network backwater is lower than 45 ℃, a third valve is not required to be opened at the moment, and heat exchange is not required in a heat exchanger for heat supply network water to be directly introduced into a water quality treatment device for treatment;
when the temperature of the return water of the heating network is higher in a heating alpine period, when the temperature of the return water of the heating network is higher than 45 ℃, at the moment, a third valve is opened, condensed water is introduced into a heat exchanger, the temperature of the heat exchange water of the heating network is reduced to the working temperature required by a water quality treatment device, the heat exchange water is then introduced into the water quality treatment device, and the condensed water is introduced into the heat exchanger before a first low-pressure heater or after the first low-pressure heater according to the difference of water temperature after the temperature of the condensed water is increased;
when the temperature of the condensed water after temperature rise is lower than that of the first low-pressure heater, before the condensed water after temperature rise in the heat exchanger is introduced into the first low-pressure heater, opening a fourth valve, and closing a fifth valve, wherein the heat exchanger and the first low-pressure heater are connected in series;
when the temperature of the condensed water after temperature rise is higher than that of the first low-pressure heater, after the condensed water after temperature rise in the heat exchanger is introduced into the first low-pressure heater, the fourth valve is closed, the fifth valve is opened, and the heat exchanger and the first low-pressure heater are connected in parallel.
Compared with the prior art, the invention has the following advantages and effects: (1) The invention has reasonable design, simple structure and reliable performance, and creates a primary heat supply network water online water quality treatment system; (2) The invention can optimize the primary heat supply network water while the heat supply network operates, and improves the safety and stability of the heat supply system; (3) The invention can improve the temperature of the condensed water entering the low-pressure heater through the heat exchange between the primary heat supply network backwater and the condensed water, reduce the steam extraction of the low-pressure heater and achieve the effect of energy conservation. (4) According to the invention, the condensed water is introduced into different positions according to different temperatures of the condensed water after heat exchange, so that a larger energy-saving effect is achieved.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
In the figure: the water treatment device comprises a primary network water return pipeline 1, a bypass pipeline 2, a first valve 3, a booster pump 4, a heat exchanger 5, a water treatment device 6, a second valve 7, a third valve 9, a fourth valve 10, a fifth valve 11, a first low-pressure heater 12, a condensate pump 13 and a condenser 14.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.
Referring to fig. 1, the primary heat supply network water online water quality treatment system in the present embodiment includes a bypass pipeline 2, a first valve 3, a booster pump 4, a heat exchanger 5, a water quality treatment device 6, a second valve 7, a third valve 9, a fourth valve 10, a fifth valve 11, a first low-pressure heater 12, a condensate pump 13 and a condenser 14.
The bypass pipeline 2 is connected with the primary network water return pipeline 1, the first valve 3, the booster pump 4, the heat exchanger 5, the water quality treatment device 6 and the second valve 7 are sequentially arranged on the bypass pipeline 2 according to the flow direction of heat supply network water, the hot end inlet of the heat exchanger 5 is connected with the booster pump 4, and the hot end outlet of the heat exchanger 5 is connected with the water quality treatment device 6; the condenser 14 is connected with an inlet of the condensate pump 13 through a pipeline, an outlet of the condensate pump 13 is respectively connected with the third valve 9 and the first low-pressure heater 12, the third valve 9 is connected with a cold end inlet of the heat exchanger 5, a cold end outlet of the heat exchanger 5 is respectively connected with the fourth valve 10 and the fifth valve 11, the fourth valve 10 is connected with an inlet of the first low-pressure heater 12, and the fifth valve 11 is connected with an outlet of the first low-pressure heater 12.
In the present embodiment, the heat exchanger 5 is connected in series or in parallel with the first low-pressure heater 12.
In this embodiment, the bypass pipeline 2 sequentially introduces the primary heat supply network water into the booster pump 4 and the heat exchanger 5, the heat supply network water enters the water quality treatment device 6 after being boosted and cooled to meet the working requirement of the water quality treatment device 6, the primary heat supply network water is subjected to water quality treatment on line, and the primary heat supply network water is introduced into the primary heat supply network water return pipeline 1 after the water quality treatment.
In this embodiment, after the exhaust steam is condensed by the condenser 14, after being pressurized by the condensate pump 13, part of the condensed water flows into the heat exchanger 5 for heat exchange, and the condensed water after the temperature rise is introduced into the front of the first low-pressure heater 12 or the rear of the first low-pressure heater 12 according to the temperature of the condensed water.
In this embodiment, the water quality treatment device 6 includes a pretreatment module, an ultrafiltration membrane module, and a reverse osmosis membrane module, and the water treatment module is reasonably selected and configured according to the primary heat supply network water index condition.
The operation method is as follows:
when the water quality of primary heat supply network water is unqualified, opening a first valve 3 and a second valve 7, and treating the water quality of the heat supply network water through a bypass pipeline 2;
when the temperature of the heat supply network backwater is lower at the initial end of heating, and when the temperature of the heat supply network backwater is lower than 45 ℃, the third valve 9 is not required to be opened, and the heat supply network water is directly introduced into the water quality treatment device 6 for treatment without heat exchange in the heat exchanger 5;
when the temperature of the return water of the heating network is higher in a heating alpine period, when the temperature of the return water of the heating network is more than 45 ℃, at the moment, the third valve 9 is opened, condensed water is introduced into the heat exchanger 5, the temperature of the heat-exchanged heat of the water of the heating network is reduced to the working temperature required by the water quality treatment device 6, and then the heat-exchanged heat of the water of the heating network is introduced into the water quality treatment device 6, and the condensed water is introduced into the front of the first low-pressure heater 12 or behind the first low-pressure heater 12 according to the difference of water temperature after being heated in the heat exchanger 5;
when the temperature of the condensed water after temperature rise is lower than that of the first low-pressure heater 12, before the condensed water after temperature rise in the heat exchanger 5 is introduced into the first low-pressure heater 12, the fourth valve 10 is opened, the fifth valve 11 is closed, and at the moment, the heat exchanger 5 and the first low-pressure heater 12 are connected in series;
when the temperature of the condensed water after temperature rise is higher than that of the first low-pressure heater 12, after the condensed water after temperature rise in the heat exchanger 5 is introduced into the first low-pressure heater 12, the fourth valve 10 is closed, the fifth valve 11 is opened, and at this time, the heat exchanger 5 and the first low-pressure heater 12 are connected in parallel.
Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited to the above embodiments, and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (4)
1. The primary heat supply network water online water quality treatment system is characterized by comprising a bypass pipeline (2), a first valve (3), a booster pump (4), a heat exchanger (5), a water quality treatment device (6), a second valve (7), a third valve (9), a fourth valve (10), a fifth valve (11), a first low-pressure heater (12), a condensate pump (13) and a condenser (14); the bypass pipeline (2) is connected with the primary network water return pipeline (1), the first valve (3), the booster pump (4), the heat exchanger (5), the water quality treatment device (6) and the second valve (7) are sequentially arranged on the bypass pipeline (2) according to the flow direction of hot network water, the hot end inlet of the heat exchanger (5) is connected with the booster pump (4), and the hot end outlet of the heat exchanger (5) is connected with the water quality treatment device (6); the condenser (14) is connected with an inlet of the condensate pump (13) through a pipeline, an outlet of the condensate pump (13) is connected with a third valve (9) and a first low-pressure heater (12) respectively, the third valve (9) is connected with a cold end inlet of the heat exchanger (5), a cold end outlet of the heat exchanger (5) is connected with a fourth valve (10) and a fifth valve (11) respectively, the fourth valve (10) is connected with an inlet of the first low-pressure heater (12), and the fifth valve (11) is connected with an outlet of the first low-pressure heater (12); the water quality treatment device (6) comprises a pretreatment module, an ultrafiltration membrane module and a reverse osmosis membrane module, and the water treatment module is reasonably selected and configured according to the water index condition of the primary heat supply network.
2. The primary heat supply network water online water quality treatment system according to claim 1, wherein the bypass pipeline (2) sequentially introduces the primary heat supply network water into the booster pump (4) and the heat exchanger (5), and after the heat supply network water reaches the working requirement of the water quality treatment device (6) through boosting and cooling, the heat supply network water enters the water quality treatment device (6), carries out online water quality treatment on the primary heat supply network water, and after the water quality treatment, the heat supply network water is introduced into the primary heat supply network water return pipeline (1) of the primary heat supply network.
3. The primary heat supply network water online water quality treatment system according to claim 1, wherein after the condenser (14) condenses the dead steam, part of the condensed water flows into the heat exchanger (5) for heat exchange after being pressurized by the condensate pump (13), and the condensed water after temperature rise is introduced into the front of the first low-pressure heater (12) or the rear of the first low-pressure heater (12) according to the temperature of the condensed water.
4. A method of operating a primary heating network water on-line water quality treatment system as claimed in any one of claims 1 to 3, wherein the process is as follows:
when the water quality of primary heat supply network water is unqualified, a first valve (3) and a second valve (7) are opened, and the heat supply network water is subjected to water quality treatment through a bypass pipeline (2);
when the temperature of the heat supply network backwater is lower at the initial end of heating, and when the temperature of the heat supply network backwater is lower than 45 ℃, at this time, the third valve (9) is not required to be opened, the heat supply network water is not required to exchange heat in the heat exchanger (5), and the heat supply network backwater is directly introduced into the water quality treatment device (6) for treatment;
when the temperature of the backwater of the heating network is higher in a heating alpine period, when the temperature of the backwater of the heating network is higher than 45 ℃, at the moment, a third valve (9) is opened, condensed water is introduced into a heat exchanger (5), the temperature of the heat exchanged heat of the heating network is reduced to the working temperature required by a water quality treatment device (6), then the heat exchanged heat of the heating network is introduced into the water quality treatment device (6), and the condensed water is introduced into the front of a first low-pressure heater (12) or the rear of the first low-pressure heater (12) according to the difference of water temperature after being heated in the heat exchanger (5);
when the temperature of the condensed water after temperature rise is lower than that of the first low-pressure heater (12), before the condensed water after temperature rise in the heat exchanger (5) is introduced into the first low-pressure heater (12), the fourth valve (10) is opened, the fifth valve (11) is closed, and at the moment, the heat exchanger (5) and the first low-pressure heater (12) are connected in series;
when the temperature of the condensed water after temperature rise is higher than that of the first low-pressure heater (12), after the condensed water after temperature rise in the heat exchanger (5) is introduced into the first low-pressure heater (12), the fourth valve (10) is closed, the fifth valve (11) is opened, and at the moment, the heat exchanger (5) and the first low-pressure heater (12) are connected in parallel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910453223.6A CN110274291B (en) | 2019-05-28 | 2019-05-28 | Online water quality treatment system for primary heat supply network water and operation method thereof |
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| CN201910453223.6A CN110274291B (en) | 2019-05-28 | 2019-05-28 | Online water quality treatment system for primary heat supply network water and operation method thereof |
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| CN110274291A CN110274291A (en) | 2019-09-24 |
| CN110274291B true CN110274291B (en) | 2023-08-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2005265C1 (en) * | 1988-09-23 | 1993-12-30 | Ruzavin Georgij S | Method and system for heat supply to users |
| CN204006255U (en) * | 2014-07-04 | 2014-12-10 | 盾安（天津）节能系统有限公司 | A kind of waste heat recovery central heating system |
| CN107289491A (en) * | 2017-08-04 | 2017-10-24 | 中能信创（北京）售电有限公司 | The heating system that a kind of residual heat of condensed water is coupled with waste water residual heat |
| CN207035380U (en) * | 2017-06-13 | 2018-02-23 | 沈阳建筑大学 | The air-conditioning system of station air draft water resource heat pump and heat supply network complementation combined heat |
| CN109237587A (en) * | 2018-09-13 | 2019-01-18 | 华电电力科学研究院有限公司 | A kind of Low Vacuum Heating System and operation method coupling big temperature difference heat pump |
| CN109724135A (en) * | 2019-01-28 | 2019-05-07 | 西安华新新能源股份有限公司 | A kind of big temperature-difference central heating system using electric compression heat pump |
-
2019
- 2019-05-28 CN CN201910453223.6A patent/CN110274291B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2005265C1 (en) * | 1988-09-23 | 1993-12-30 | Ruzavin Georgij S | Method and system for heat supply to users |
| CN204006255U (en) * | 2014-07-04 | 2014-12-10 | 盾安（天津）节能系统有限公司 | A kind of waste heat recovery central heating system |
| CN207035380U (en) * | 2017-06-13 | 2018-02-23 | 沈阳建筑大学 | The air-conditioning system of station air draft water resource heat pump and heat supply network complementation combined heat |
| CN107289491A (en) * | 2017-08-04 | 2017-10-24 | 中能信创（北京）售电有限公司 | The heating system that a kind of residual heat of condensed water is coupled with waste water residual heat |
| CN109237587A (en) * | 2018-09-13 | 2019-01-18 | 华电电力科学研究院有限公司 | A kind of Low Vacuum Heating System and operation method coupling big temperature difference heat pump |
| CN109724135A (en) * | 2019-01-28 | 2019-05-07 | 西安华新新能源股份有限公司 | A kind of big temperature-difference central heating system using electric compression heat pump |
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