CN110657482A - Heating extraction return water waste heat utilization connecting system and method - Google Patents
Heating extraction return water waste heat utilization connecting system and method Download PDFInfo
- Publication number
- CN110657482A CN110657482A CN201910951933.1A CN201910951933A CN110657482A CN 110657482 A CN110657482 A CN 110657482A CN 201910951933 A CN201910951933 A CN 201910951933A CN 110657482 A CN110657482 A CN 110657482A
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- heat exchanger
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- 239000002918 waste heat Substances 0.000 title claims abstract description 41
- 238000010438 heat treatment Methods 0.000 title claims abstract description 40
- 238000000605 extraction Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 31
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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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
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
- F24D11/005—Central heating systems using heat accumulated in storage masses water heating system with recuperation of waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- 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
- F24D10/00—District heating systems
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0012—Recuperative heat exchangers the heat being recuperated from waste water or from condensates
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/17—District heating
Abstract
The invention discloses a heating steam extraction backwater waste heat utilization connecting system and a method, wherein the system comprises a heat supply network initial station, a plate type heat exchanger, a low-pressure heater group, a condensate pump, a deaerator and a heat well, wherein an inlet of the low-pressure heater group is connected with an inlet of a cold section of the plate type heat exchanger, an outlet of the cold section of the plate type heat exchanger is connected with an outlet of the low-pressure heater group, a steam supply drain of the heat supply network initial station is connected with an inlet of the hot section of the plate type heat exchanger, and an outlet of the hot section of the plate type heat; the deaerator is connected with an outlet of the low-pressure heater group, and the hot well is connected with an inlet of the low-pressure heater group through a condensate pump. On the basis of ensuring effective utilization of backwater waste heat, the invention utilizes the pressure difference between the heat supply network head station and the heat well to convey the heat supply network head station drainage to the heat well, thereby effectively reducing the use amount of rotary equipment and further reducing the plant power consumption and the maintenance cost of the rotary equipment.
Description
Technical Field
The invention relates to a heating extraction return water waste heat utilization connecting system and method, and belongs to the technical field of steam turbine generator units.
Background
Along with the improvement of the living standard of people, the urban heat supply area is increased year by year, and the large-capacity cogeneration unit is replacing a coal-fired boiler and a laggard small thermal power unit in the aspect of urban central heat supply due to the superiority in the aspects of energy conservation and emission reduction.
In order to effectively utilize the waste heat of the heating extraction return water, at present, the heating extraction steam is directly pumped into a certain low heating outlet through a drain pump after finishing heat exchange with the circulating water of a heat supply network at a first station. The system increases the using quantity of the rotating equipment, increases the maintenance cost and improves the plant power consumption rate.
Disclosure of Invention
Aiming at the defects of the method, the invention provides the heating extraction return water waste heat utilization connecting system and the method, which can reduce the using amount of the rotating equipment, and further reduce the plant power consumption rate and the maintenance cost of the rotating equipment.
The technical scheme adopted for solving the technical problems is as follows:
on one hand, the heating steam extraction backwater waste heat utilization connecting system provided by the embodiment of the invention comprises a heat supply network initial station, a plate type heat exchanger, a low-pressure heater group, a condensate pump, a deaerator and a heat well, wherein an inlet of the low-pressure heater group is connected with an inlet of a cold section of the plate type heat exchanger, an outlet of the cold section of the plate type heat exchanger is connected with an outlet of the low-pressure heater group, a steam supply drain of the heat supply network initial station is connected with an inlet of the hot section of the plate type heat exchanger, and an outlet of the hot section of the plate type heat; the deaerator is connected with an outlet of the low-pressure heater group, and the hot well is connected with an inlet of the low-pressure heater group through a condensate pump.
As a possible implementation manner of this embodiment, the low pressure heater group includes a plurality of low pressure heaters connected in series in sequence.
As a possible implementation manner of this embodiment, the low-pressure heater group includes 2 to 4 low-pressure heaters connected in series in sequence.
As a possible implementation manner of this embodiment, the cold section inlet and the hot section inlet of the plate heat exchanger are respectively disposed on a valve.
On the other hand, the method for utilizing the waste heat of the heating extraction return water, provided by the embodiment of the invention, comprises the following steps:
the heating steam extraction backwater waste heat utilization connecting system is connected;
and performing waste heat utilization of heating steam extraction backwater.
As a possible implementation manner of this embodiment, the heating extraction return water waste heat utilization connection system is the heating extraction return water waste heat utilization connection system.
As a possible implementation manner of this embodiment, the process of utilizing the waste heat of the heating extraction return water includes the following steps:
adjusting steam supply and drainage of the heat supply network initial station to inlet and outlet valves of the plate heat exchanger to maintain the water level of the heat supply network initial station;
adjusting the condensed water to an inlet valve and an outlet valve of the plate heat exchanger;
and regulating the flow of the condensate entering the plate heat exchanger and the temperature of the outlet of the cold section of the plate heat exchanger to keep the temperature of the condensate at the outlet of the cold section of the plate heat exchanger consistent with the temperature of steam supply and drainage at the initial station of the heat supply network.
The technical scheme of the embodiment of the invention has the following beneficial effects:
the heating steam extraction backwater waste heat utilization connecting system comprises a heat supply network initial station, a plate type heat exchanger, a low-pressure heater group, a condensate pump, a deaerator and a heat well, wherein an inlet of the low-pressure heater group is connected with an inlet of a cold section of the plate type heat exchanger, an outlet of the cold section of the plate type heat exchanger is connected with an outlet of the low-pressure heater group, a steam supply drain of the heat supply network initial station is connected with an inlet of the hot section of the plate type heat exchanger, and an outlet of the hot section of the plate type heat exchanger is connected with the heat well; the deaerator is connected with an outlet of the low-pressure heater group, and the hot well is connected with an inlet of the low-pressure heater group through a condensate pump. On the basis of ensuring effective utilization of backwater waste heat, the invention utilizes the pressure difference between the heat supply network head station and the heat well to convey the heat supply network head station drainage to the heat well, thereby effectively reducing the use amount of rotary equipment and further reducing the plant power consumption and the maintenance cost of the rotary equipment.
According to the technical scheme of the embodiment of the invention, the method for utilizing the waste heat of the heating extraction return water comprises the following steps of firstly connecting a heating extraction return water waste heat utilization connecting system, and then utilizing the waste heat of the heating extraction return water through the following steps: adjusting steam supply and drainage of the heat supply network initial station to inlet and outlet valves of the plate heat exchanger to maintain the water level of the heat supply network initial station; adjusting the condensed water to an inlet valve and an outlet valve of the plate heat exchanger; and regulating the flow of the condensate entering the plate heat exchanger and the temperature of the outlet of the cold section of the plate heat exchanger to keep the temperature of the condensate at the outlet of the cold section of the plate heat exchanger consistent with the temperature of steam supply and drainage at the initial station of the heat supply network. On the basis of ensuring effective utilization of backwater waste heat, the invention utilizes the pressure difference between the heat supply network head station and the heat well to convey the heat supply network head station drainage to the heat well, thereby effectively reducing the use amount of rotary equipment and further reducing the plant power consumption and the maintenance cost of the rotary equipment.
Description of the drawings:
FIG. 1 is a schematic diagram illustrating a heating extraction return water waste heat utilization coupling system according to an exemplary embodiment;
1, NO1 low-pressure heater; 2. NOn low pressure heater (n is 2, 3 or 4); 3. a deaerator; 4. a hot well; 5. a condensate pump; 6. a heat supply network initial station; 7. a hot user; 8 to 10, a valve; 12 to 15, a valve; 16. a plate heat exchanger.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
in order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
FIG. 1 is a schematic diagram of a heating extraction return water waste heat utilization connection system according to an exemplary embodiment. As shown in fig. 1, the heating steam extraction backwater waste heat utilization connection system provided by the embodiment of the invention comprises a heat supply network initial station, a plate heat exchanger, a low-pressure heater group, a condensate pump, a deaerator and a heat well, wherein an inlet of the low-pressure heater group is connected with an inlet of a cold section of the plate heat exchanger, an outlet of the cold section of the plate heat exchanger is connected with an outlet of the low-pressure heater group, a steam supply drain of the heat supply network initial station is connected with an inlet of a hot section of the plate heat exchanger, and an outlet of the hot section of the plate heat exchanger is connected with the; the deaerator is connected with an outlet of the low-pressure heater group, and the hot well is connected with an inlet of the low-pressure heater group through a condensate pump.
The system is specifically connected in a mode that an inlet of an NO1 low-pressure heater 1 is connected with an inlet of a cold section of a plate heat exchanger 16 through a valve 15, an outlet of the cold section of the plate heat exchanger 16 is connected with an outlet of a NOn low-pressure heater 2 through a valve 14, steam supply and drainage of a heat supply network head station 6 are connected with an inlet of a hot section of the plate heat exchanger 16 through a valve 13, and an outlet of the hot section of the plate heat exchanger 16 is connected with a hot well 4 through a valve 12. The steam supply and drainage temperature of the heat supply network head station 6 is higher than the outlet water temperature of NOn low-pressure heaters 2.
The embodiment of the invention provides a method for utilizing waste heat of heating extraction return water, which comprises the following steps:
the heating steam extraction backwater waste heat utilization connecting system is connected; the heating steam extraction backwater waste heat utilization connecting system is the heating steam extraction backwater waste heat utilization connecting system.
Performing waste heat utilization of heating steam extraction backwater;
the process for utilizing the waste heat of the heating extraction steam return water comprises the following steps:
adjusting steam supply and drainage of the heat supply network initial station to inlet and outlet valves of the plate heat exchanger to maintain the water level of the heat supply network initial station;
adjusting the condensed water to an inlet valve and an outlet valve of the plate heat exchanger;
and regulating the flow of the condensate entering the plate heat exchanger and the temperature of the outlet of the cold section of the plate heat exchanger to keep the temperature of the condensate at the outlet of the cold section of the plate heat exchanger consistent with the temperature of steam supply and drainage at the initial station of the heat supply network.
The foregoing is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements are also considered to be within the scope of the present invention.
Claims (7)
1. A heating steam extraction backwater waste heat utilization connecting system is characterized by comprising a heat supply network initial station, a plate type heat exchanger, a low-pressure heater group, a condensate pump, a deaerator and a heat well, wherein an inlet of the low-pressure heater group is connected with an inlet of a cold section of the plate type heat exchanger, an outlet of the cold section of the plate type heat exchanger is connected with an outlet of the low-pressure heater group, a steam supply drain of the heat supply network initial station is connected with an inlet of a hot section of the plate type heat exchanger, and an outlet of the hot section of the plate type heat exchanger is; the deaerator is connected with an outlet of the low-pressure heater group, and the hot well is connected with an inlet of the low-pressure heater group through a condensate pump.
2. The connecting system for utilizing the waste heat of the extracted steam and the returned water of the heating as claimed in claim 1, wherein the low-pressure heater group comprises a plurality of low-pressure heaters which are connected in series in sequence.
3. The connecting system for utilizing the waste heat of the extracted steam and the returned water of the heating as claimed in claim 1, wherein the low-pressure heater group comprises 2-4 low-pressure heaters which are sequentially connected in series.
4. The system for utilizing the waste heat of the extracted steam and the returned water of the heating as claimed in claim 1, wherein the cold section inlet and the hot section inlet of the plate heat exchanger are respectively provided with a valve.
5. A heating steam extraction backwater waste heat utilization method is characterized by comprising the following steps:
the heating steam extraction backwater waste heat utilization connecting system is connected;
and performing waste heat utilization of heating steam extraction backwater.
6. The method for utilizing the waste heat of the heating extracted steam backwater as claimed in claim 5, wherein the connecting system for utilizing the waste heat of the heating extracted steam backwater is the connecting system for utilizing the waste heat of the heating extracted steam backwater as claimed in claims 1 to 4.
7. The method for utilizing the waste heat of the heating extraction return water as claimed in claim 5, wherein the process for utilizing the waste heat of the heating extraction return water comprises the following steps:
adjusting steam supply and drainage of the heat supply network initial station to inlet and outlet valves of the plate heat exchanger to maintain the water level of the heat supply network initial station;
adjusting the condensed water to an inlet valve and an outlet valve of the plate heat exchanger;
and regulating the flow of the condensate entering the plate heat exchanger and the temperature of the outlet of the cold section of the plate heat exchanger to keep the temperature of the condensate at the outlet of the cold section of the plate heat exchanger consistent with the temperature of steam supply and drainage at the initial station of the heat supply network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910951933.1A CN110657482A (en) | 2019-09-30 | 2019-09-30 | Heating extraction return water waste heat utilization connecting system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910951933.1A CN110657482A (en) | 2019-09-30 | 2019-09-30 | Heating extraction return water waste heat utilization connecting system and method |
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| Publication Number | Publication Date |
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| CN110657482A true CN110657482A (en) | 2020-01-07 |
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| CN201910951933.1A Pending CN110657482A (en) | 2019-09-30 | 2019-09-30 | Heating extraction return water waste heat utilization connecting system and method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100618292B1 (en) * | 2004-11-04 | 2006-09-06 | 한국열병합발전기주식회사 | Triple purpose integrated power, heat and cold cogeneration system with absortion cooler from natural gas |
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| CN204757076U (en) * | 2015-05-19 | 2015-11-11 | 北京创时能源有限公司 | Steam power plant's heat supply hydrophobic waste heat recovery system of drawing gas |
| CN205299698U (en) * | 2016-01-08 | 2016-06-08 | 中国建筑西南设计研究院有限公司 | Accurate elasticity heat accumulation direct type solar heating system of modularization |
| CN107023819A (en) * | 2017-05-22 | 2017-08-08 | 山西中源科扬节能服务有限公司 | Low low-level (stack-gas) economizer Two-way Cycle heating system and Two-way Cycle heating means |
| CN108087944A (en) * | 2017-12-31 | 2018-05-29 | 联合瑞升（北京）科技有限公司 | A kind of condensation water recycling heating system based on water water ejector |
-
2019
- 2019-09-30 CN CN201910951933.1A patent/CN110657482A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100618292B1 (en) * | 2004-11-04 | 2006-09-06 | 한국열병합발전기주식회사 | Triple purpose integrated power, heat and cold cogeneration system with absortion cooler from natural gas |
| CN204757076U (en) * | 2015-05-19 | 2015-11-11 | 北京创时能源有限公司 | Steam power plant's heat supply hydrophobic waste heat recovery system of drawing gas |
| CN104896503A (en) * | 2015-06-19 | 2015-09-09 | 东方电气集团东方锅炉股份有限公司 | Boiler smoke waste heat use system |
| CN205299698U (en) * | 2016-01-08 | 2016-06-08 | 中国建筑西南设计研究院有限公司 | Accurate elasticity heat accumulation direct type solar heating system of modularization |
| CN107023819A (en) * | 2017-05-22 | 2017-08-08 | 山西中源科扬节能服务有限公司 | Low low-level (stack-gas) economizer Two-way Cycle heating system and Two-way Cycle heating means |
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Effective date of registration: 20220216 Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Applicant after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Applicant after: QINGDAO HUACHEN WEIYE ELECTRIC POWER TECHNOLOGY ENGINEERING Co.,Ltd. Applicant after: STATE GRID CORPORATION TECHNICAL College BRANCH Applicant after: STATE GRID CORPORATION OF CHINA Address before: 250002 Wang Yue Road, Ji'nan City, Shandong Province, No. 2000 Applicant before: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Applicant before: SHANDONG ELECTRIC POWER Research Institute Applicant before: QINGDAO HUACHEN WEIYE ELECTRIC POWER TECHNOLOGY ENGINEERING Co.,Ltd. Applicant before: STATE GRID CORPORATION TECHNICAL College BRANCH Applicant before: STATE GRID CORPORATION OF CHINA |