CN116255213A - Industrial steam supply system based on steam heat source - Google Patents

Industrial steam supply system based on steam heat source Download PDF

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Publication number
CN116255213A
CN116255213A CN202211095552.6A CN202211095552A CN116255213A CN 116255213 A CN116255213 A CN 116255213A CN 202211095552 A CN202211095552 A CN 202211095552A CN 116255213 A CN116255213 A CN 116255213A
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CN
China
Prior art keywords
steam
outlet end
inlet end
heat exchanger
cogeneration unit
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Pending
Application number
CN202211095552.6A
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Chinese (zh)
Inventor
刘学亮
张民
王成华
时俊
李梦龙
余小兵
杨利
郑天帅
杨庆川
顾雨恒
薛晨晰
王妍
万超
吕凯
王东晔
林轶
赵若昱
李保垒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
Shandong Rizhao Power Generation Co Ltd
Original Assignee
Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
Shandong Rizhao Power Generation Co Ltd
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Application filed by Xian Thermal Power Research Institute Co Ltd, Xian Xire Energy Saving Technology Co Ltd, Shandong Rizhao Power Generation Co Ltd filed Critical Xian Thermal Power Research Institute Co Ltd
Priority to CN202211095552.6A priority Critical patent/CN116255213A/en
Publication of CN116255213A publication Critical patent/CN116255213A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D13/00—Combinations of two or more machines or engines
    • F01D13/02—Working-fluid interconnection of machines or engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Abstract

The present disclosure proposes an industrial steam supply system based on a steam heat source, comprising: the hot side steam inlet end of the first heat exchanger is connected with the main steam outlet end of the cogeneration unit, the hot side liquid outlet end of the first heat exchanger is connected with the condensed water liquid outlet end of the cogeneration unit, and the cold side liquid inlet end of the first heat exchanger is connected with the deoxygenated water liquid outlet end of the cogeneration unit; the hot side steam inlet end of the second heat exchanger is connected with the reheat steam outlet end of the cogeneration unit, the hot side steam outlet end of the second heat exchanger is connected with the low-pressure steam inlet end of the cogeneration unit, and the cold side steam inlet end of the second heat exchanger is connected with the cold side steam outlet end of the first heat exchanger. In the industrial steam supply system based on the steam heat source, the steam supply capacity of the industrial steam supply system is greatly improved, the industrial steam supply system is ensured to be still capable of stably supplying steam when the main steam quantity of the cogeneration unit is reduced, and the influence of factors such as reheat overtemperature, deep peak shaving and the like is avoided.

Description

Industrial steam supply system based on steam heat source
Technical Field
The disclosure relates to the technical field of industrial steam supply, in particular to an industrial steam supply system based on a steam heat source.
Background
The high-temperature high-pressure steam is one of raw materials required by production processes in various industries, and particularly high-parameter steam with the pressure of more than 4MPa is required in the industries such as chemical industry, petroleum industry and the like. For the production of high-temperature high-pressure steam, the conventional scheme is to construct a small-scale steam boiler by a steam enterprise to meet the steam demand, but the mode is easy to cause the problem of atmospheric pollution due to the fact that the small-scale steam boiler is more, and the efficiency of the steam boiler built by the enterprise is lower, so that the production cost of the enterprise is seriously increased. Therefore, a large cogeneration unit is required to perform concentrated steam supply.
At present, the cogeneration unit generally adopts main steam to supply steam, but the mode is easily limited by the reheat overtemperature of the boiler, so that the steam supply quantity is smaller, and the steam supply capacity of the cogeneration unit can be further reduced when the deep peak regulation is faced, and the steam consumption requirement cannot be met.
Disclosure of Invention
The present disclosure aims to solve, at least to some extent, one of the technical problems in the related art.
To this end, an object of the present disclosure is to provide an industrial steam supply system based on a steam heat source.
To achieve the above object, the present disclosure provides an industrial steam supply system based on a steam heat source, comprising: a cogeneration unit; a first heat exchanger, the hot side steam inlet end of the first heat exchanger is connected with the main steam outlet end of the cogeneration unit, the hot side liquid outlet end of the first heat exchanger is connected with the condensed water liquid outlet end of the cogeneration unit, and the cold side liquid outlet end of the first heat exchanger is connected with the deoxygenated water liquid outlet end of the cogeneration unit; the hot side steam inlet end of the second heat exchanger is connected with the reheat steam outlet end of the cogeneration unit, the hot side steam outlet end of the second heat exchanger is connected with the low-pressure steam inlet end of the cogeneration unit, the cold side steam inlet end of the second heat exchanger is connected with the cold side steam outlet end of the first heat exchanger, and the cold side steam outlet end of the second heat exchanger is connected with the steam inlet end of the steam using equipment.
Optionally, the industrial steam supply system further comprises: the variable-frequency booster pump is arranged between the cold side liquid inlet end of the first heat exchanger and the deoxidized water liquid outlet end of the cogeneration unit, the liquid inlet end of the variable-frequency booster pump is connected with the deoxidized water liquid outlet end of the cogeneration unit, and the liquid outlet end of the variable-frequency booster pump is connected with the cold side liquid inlet end of the first heat exchanger.
Optionally, the industrial steam supply system further comprises: the first flow regulating valve is arranged between the liquid inlet end of the variable-frequency booster pump and the deoxygenated water liquid outlet end of the cogeneration unit, the liquid inlet end of the first flow regulating valve is connected with the deoxygenated water liquid outlet end of the cogeneration unit, and the liquid outlet end of the first flow regulating valve is connected with the liquid inlet end of the variable-frequency booster pump.
Optionally, the industrial steam supply system further comprises: the second flow regulating valve is arranged between the cold side steam outlet end of the second heat exchanger and the steam inlet end of the steam utilization device, the steam inlet end of the second flow regulating valve is connected with the cold side steam outlet end of the second heat exchanger, and the steam outlet end of the second flow regulating valve is connected with the steam inlet end of the steam utilization device.
Optionally, the industrial steam supply system further comprises: the third flow regulating valve is arranged between the hot side liquid outlet end of the first heat exchanger and the condensed water liquid outlet end of the cogeneration unit, the liquid inlet end of the third flow regulating valve is connected with the hot side liquid outlet end of the first heat exchanger, and the liquid outlet end of the third flow regulating valve is connected with the condensed water liquid outlet end of the cogeneration unit; the fourth flow regulating valve is arranged between the hot side steam outlet end of the second heat exchanger and the low-pressure steam inlet end of the cogeneration unit, the steam inlet end of the fourth flow regulating valve is connected with the hot side steam outlet end of the second heat exchanger, and the steam outlet end of the fourth flow regulating valve is connected with the low-pressure steam inlet end of the cogeneration unit.
Optionally, the industrial steam supply system further comprises: the first switch valve is arranged between the hot side steam inlet end of the first heat exchanger and the main steam outlet end of the cogeneration unit, the steam inlet end of the first switch valve is connected with the main steam outlet end of the cogeneration unit, and the steam outlet end of the first switch valve is connected with the hot side steam inlet end of the first heat exchanger; the second switch valve is arranged between the hot side steam inlet end of the second heat exchanger and the reheat steam outlet end of the cogeneration unit, the steam inlet end of the second switch valve is connected with the reheat steam outlet end of the cogeneration unit, and the steam outlet end of the second switch valve is connected with the hot side steam inlet end of the second heat exchanger.
Optionally, the cogeneration unit includes: the main steam outlet end of the boiler is connected with the hot side steam inlet end of the first heat exchanger, and the reheat steam outlet end of the boiler is connected with the hot side steam inlet end of the second heat exchanger; the steam inlet end of the high-pressure cylinder is connected with the main steam outlet end of the boiler, and the steam outlet end of the high-pressure cylinder is connected with the reheat steam inlet end of the boiler; the steam inlet end of the medium pressure cylinder is connected with the steam outlet end of reheat steam of the boiler; and the steam inlet end of the low-pressure cylinder is connected with the steam outlet end of the medium-pressure cylinder and the hot side steam outlet end of the second heat exchanger.
Optionally, the cogeneration unit further comprises: the hot side steam inlet end of the condenser is connected with the steam outlet end of the low-pressure cylinder, and cooling water is introduced into the cold side of the condenser; the liquid outlet end of the deaerator is connected with the main steam liquid inlet end of the boiler and the cold side liquid inlet end of the first heat exchanger.
Optionally, the cogeneration unit further comprises: the condensate pump is arranged between the liquid inlet end of the deaerator and the hot side liquid outlet end of the condenser, the liquid inlet end of the condensate pump is connected with the hot side liquid outlet end of the condenser, and the liquid outlet end of the condensate pump is connected with the liquid inlet end of the deaerator; the deoxygenation water pump is arranged between the liquid outlet end of the deoxygenator and the main steam liquid inlet end of the boiler, the liquid inlet end of the deoxygenation water pump is connected with the liquid outlet end of the deoxygenator, and the liquid outlet end of the deoxygenation water pump is connected with the main steam liquid inlet end of the boiler.
Optionally, the cogeneration unit further comprises: the hot side steam inlet end of the high-pressure heater is respectively connected with the steam outlet end of the high-pressure cylinder and the steam outlet end of the medium-pressure cylinder, the hot side steam outlet end of the high-pressure heater is connected with the steam inlet end of the deaerator, the cold side of the high-pressure heater is arranged between the liquid outlet end of the deaeration water pump and the main steam liquid inlet end of the boiler, the liquid outlet end of the cold side of the high-pressure heater is connected with the liquid outlet end of the deaeration water pump, and the liquid outlet end of the cold side of the high-pressure heater is connected with the main steam liquid inlet end of the boiler; the low-pressure heater, the hot side steam inlet end of low-pressure heater with the play vapour end of well pressure jar reaches the play vapour end of low pressure jar links to each other respectively, the hot side steam outlet end of low-pressure heater with the feed liquor end of condensate pump links to each other, the cold side setting of low-pressure heater is in the play liquid end of condensate pump with between the feed liquor end of deaerator links to each other, the cold side feed liquor end of low-pressure heater with the play liquid end of condensate pump links to each other, the cold side play liquid end of low-pressure heater with the feed liquor end of deaerator links to each other.
The technical scheme provided by the disclosure can comprise the following beneficial effects:
the part of main steam of the cogeneration unit passes through the hot side of the first heat exchanger, and the part of reheat steam of the cogeneration unit passes through the hot side of the second heat exchanger, so that part of deoxidized water of the cogeneration unit is heated into saturated steam by the main steam of the hot side of the first heat exchanger when passing through the cold side of the first heat exchanger, and the saturated steam is heated into superheated steam by the reheat steam of the hot side of the second heat exchanger when passing through the cold side of the second heat exchanger, and the superheated steam is supplied to steam equipment for use so as to realize centralized steam supply and meet the use requirements.
The deoxygenated water of the cogeneration unit is used as a water source, and the main steam and the reheat steam of the cogeneration unit are used as heat sources, so that the steam supply capacity of an industrial steam supply system is greatly improved, the industrial steam supply system is ensured to be still capable of stably supplying steam when the main steam amount of the cogeneration unit is reduced, and the influence of factors such as reheat overtemperature, deep peak shaving and the like is avoided; the industrial steam supply system is only provided with the first heat exchanger and the second heat exchanger on the cogeneration unit, is convenient to install, has low transformation cost, and ensures the safe operation of the cogeneration unit while improving the steam supply capacity.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of an industrial steam supply system based on a steam heat source according to a related embodiment;
as shown in the figure: 1. the cogeneration unit comprises 2, a first heat exchanger, 3, a second heat exchanger, 4, a variable frequency booster pump, 5, a first flow regulating valve, 6, a second flow regulating valve, 7, a third flow regulating valve, 8, a fourth flow regulating valve, 9 and a first switch valve, 10, a second switching valve, 11, a boiler, 12, a high-pressure cylinder, 13, a medium-pressure cylinder, 14, a low-pressure cylinder, 15, a condenser, 16, a deaerator, 17, a condensate pump, 18, a deaeration water pump, 19, a high-pressure heater, 20 and a low-pressure heater.
Detailed Description
Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present disclosure and are not to be construed as limiting the present disclosure. On the contrary, the embodiments of the disclosure include all alternatives, modifications, and equivalents as may be included within the spirit and scope of the appended claims.
As shown in fig. 1, the embodiment of the disclosure provides an industrial steam supply system based on a steam heat source, which comprises a cogeneration unit 1, a first heat exchanger 2 and a second heat exchanger 3, wherein a hot side steam inlet end of the first heat exchanger 2 is connected with a main steam outlet end of the cogeneration unit 1, a hot side liquid outlet end of the first heat exchanger 2 is connected with a condensate liquid outlet end of the cogeneration unit 1, a cold side liquid inlet end of the first heat exchanger 2 is connected with an deoxidized water outlet end of the cogeneration unit 1, a hot side steam inlet end of the second heat exchanger 3 is connected with a reheat steam outlet end of the cogeneration unit 1, a hot side steam outlet end of the second heat exchanger 3 is connected with a low-pressure steam inlet end of the cogeneration unit 1, a cold side steam inlet end of the second heat exchanger 3 is connected with a cold side steam outlet end of the first heat exchanger 2, and a cold side steam outlet end of the second heat exchanger 3 is connected with a steam inlet end of a steam using device.
It can be understood that part of the main steam of the cogeneration unit 1 passes through the hot side of the first heat exchanger 2, and part of the reheat steam of the cogeneration unit 1 passes through the hot side of the second heat exchanger 3, so that part of the deoxidized water of the cogeneration unit 1 is heated into saturated steam by the main steam of the hot side of the first heat exchanger 2 when passing through the cold side of the first heat exchanger 2, and the saturated steam is heated into superheated steam by the reheat steam of the hot side of the second heat exchanger 3 when passing through the cold side of the second heat exchanger 3, and the superheated steam is supplied to steam equipment for use, thereby realizing concentrated steam supply and meeting the use requirements.
The deoxygenated water of the cogeneration unit 1 is used as a water source, and the main steam and the reheat steam of the cogeneration unit 1 are used as heat sources, so that the steam supply capacity of an industrial steam supply system is greatly improved, stable steam supply of the industrial steam supply system is ensured when the main steam amount of the cogeneration unit 1 is reduced, and the influence of factors such as reheat overtemperature, deep peak shaving and the like is avoided.
The industrial steam supply system is provided with the first heat exchanger 2 and the second heat exchanger 3 only on the cogeneration unit 1, has a simple structure, is convenient to install, has low transformation cost, and ensures the safe operation of the cogeneration unit 1 while improving the steam supply capacity.
The first heat exchanger 2 and the second heat exchanger 3 each include a hot side and a cold side for heat exchange, and the heat exchange between the hot side and the cold side may be direct or indirect via a heat exchange medium or the like.
As shown in fig. 1, in some embodiments, the industrial steam supply system further includes a variable frequency booster pump 4, where the variable frequency booster pump 4 is disposed between the cold side liquid inlet end of the first heat exchanger 2 and the deoxygenated water liquid outlet end of the cogeneration unit 1, and the liquid inlet end of the variable frequency booster pump 4 is connected to the deoxygenated water liquid outlet end of the cogeneration unit 1, and the liquid outlet end of the variable frequency booster pump 4 is connected to the cold side liquid inlet end of the first heat exchanger 2.
It can be understood that the variable-frequency booster pump 4 pressurizes and conveys part of the deoxygenated water of the cogeneration unit 1 to the cold side of the first heat exchanger 2 and the cold side of the second heat exchanger 3 so as to ensure that the deoxygenated water is sequentially heated into saturated steam and superheated steam, thereby meeting the steam demand; moreover, the pressure of the superheated steam is regulated by controlling the frequency of the variable-frequency booster pump 4, so that the requirements of different steam pressures are met.
Under the conveying of the variable-frequency booster pump 4, the pressure of the superheated steam passing through the cold side of the first heat exchanger 2 and the cold side of the second heat exchanger 3 can reach more than 4MPa, and the steam consumption requirements of industries such as chemical industry, petroleum industry and the like can be met.
As shown in fig. 1, in some embodiments, the industrial steam supply system further includes a first flow regulating valve 5, where the first flow regulating valve 5 is disposed between the liquid inlet end of the variable frequency booster pump 4 and the deoxygenated water outlet end of the cogeneration unit 1, the liquid inlet end of the first flow regulating valve 5 is connected to the deoxygenated water outlet end of the cogeneration unit 1, and the liquid outlet end of the first flow regulating valve 5 is connected to the liquid inlet end of the variable frequency booster pump 4.
It can be understood that part of the deoxygenated water of the cogeneration unit 1 enters the cold side of the first heat exchanger 2 and the cold side of the second heat exchanger 3 after passing through the first flow regulating valve 5, so that the flow of the superheated steam is regulated by controlling the opening of the first flow regulating valve 5, and the requirements of different steam flows are further met.
It should be noted that, the first flow rate adjusting valve 5 may be a manual adjusting valve or an electric adjusting valve, and a flowmeter may be further disposed on a pipeline between the liquid inlet end of the variable-frequency booster pump 4 and the deoxygenated water outlet end of the cogeneration unit 1, so as to match with the first flow rate adjusting valve 5 to realize accurate adjustment of flow rate.
As shown in fig. 1, in some embodiments, the industrial steam supply system further includes a second flow regulating valve 6, where the second flow regulating valve 6 is disposed between the cold-side steam outlet end of the second heat exchanger 3 and the steam inlet end of the steam using device, and the steam inlet end of the second flow regulating valve 6 is connected to the cold-side steam outlet end of the second heat exchanger 3, and the steam outlet end of the second flow regulating valve 6 is connected to the steam inlet end of the steam using device.
It can be understood that the superheated steam at the cold side steam outlet end of the second heat exchanger 3 enters the steam using equipment after passing through the second flow regulating valve 6, so that the flow regulation of the superheated steam is realized by controlling the opening degree of the second flow regulating valve 6, and the flow regulation of the superheated steam is more accurate by the cooperation of the second flow regulating valve 6 and the first flow regulating valve 5.
It should be noted that, the second flow rate adjusting valve 6 may be a manual adjusting valve or an electric adjusting valve, and a flow meter may be disposed on a pipeline between the cold-side steam outlet end of the second heat exchanger 3 and the steam inlet end of the steam using device, so as to match with the second flow rate adjusting valve 6 to realize accurate adjustment of flow rate.
As shown in fig. 1, in some embodiments, the industrial steam supply system further includes a third flow regulating valve 7 and a fourth flow regulating valve 8, where the third flow regulating valve 7 is disposed between the hot side outlet end of the first heat exchanger 2 and the condensate outlet end of the cogeneration unit 1, the liquid inlet end of the third flow regulating valve 7 is connected to the hot side outlet end of the first heat exchanger 2, the liquid outlet end of the third flow regulating valve 7 is connected to the condensate outlet end of the cogeneration unit 1, the fourth flow regulating valve 8 is disposed between the hot side outlet end of the second heat exchanger 3 and the low pressure steam inlet end of the cogeneration unit 1, the steam inlet end of the fourth flow regulating valve 8 is connected to the hot side outlet end of the second heat exchanger 3, and the steam outlet end of the fourth flow regulating valve 8 is connected to the low pressure steam inlet end of the cogeneration unit 1.
It can be understood that the liquid at the liquid outlet end of the hot side of the first heat exchanger 2 enters the condensed water liquid outlet end of the cogeneration unit 1 after passing through the third flow rate adjusting valve 7, thereby realizing the flow adjustment of the main steam at the hot side of the first heat exchanger 2 by controlling the opening degree of the third flow rate adjusting valve 7, and the reheat steam at the liquid outlet end of the hot side of the second heat exchanger 3 enters the low-pressure steam inlet end of the cogeneration unit 1 after passing through the fourth flow rate adjusting valve 8, thereby realizing the flow adjustment of the reheat steam at the hot side of the second heat exchanger 3 by controlling the opening degree of the fourth flow rate adjusting valve 8. Therefore, the control of the superheated steam temperature is realized through the arrangement of the third flow regulating valve 7 and the fourth flow regulating valve 8, so that the requirements of different steam temperatures are met.
It should be noted that, the third flow rate adjusting valve 7 may be a manual adjusting valve or an electric adjusting valve, and a flow meter may be disposed on a pipeline between the hot side liquid outlet end of the first heat exchanger 2 and the condensed water liquid outlet end of the cogeneration unit 1, so as to match with the third flow rate adjusting valve 7 to realize accurate adjustment of flow rate.
The fourth flow regulating valve 8 can be a manual regulating valve or an electric regulating valve, and a flowmeter can be arranged on a pipeline between the hot side steam outlet end of the second heat exchanger 3 and the low-pressure steam inlet end of the cogeneration unit 1 so as to match with the fourth flow regulating valve 8 to realize accurate regulation of flow.
As shown in fig. 1, in some embodiments, the industrial steam supply system further includes a first switch valve 9 and a second switch valve 10, where the first switch valve 9 is disposed between the hot side steam inlet end of the first heat exchanger 2 and the main steam outlet end of the cogeneration unit 1, the steam inlet end of the first switch valve 9 is connected to the main steam outlet end of the cogeneration unit 1, the steam outlet end of the first switch valve 9 is connected to the hot side steam inlet end of the first heat exchanger 2, the second switch valve 10 is disposed between the hot side steam inlet end of the second heat exchanger 3 and the reheat steam outlet end of the cogeneration unit 1, the steam inlet end of the second switch valve 10 is connected to the reheat steam outlet end of the cogeneration unit 1, and the steam outlet end of the second switch valve 10 is connected to the hot side steam inlet end of the second heat exchanger 3.
It can be understood that the first switch valve 9 is used for switching between the hot side steam inlet end of the first heat exchanger 2 and the main steam outlet end of the cogeneration unit 1, the second switch valve 10 is used for switching between the hot side steam inlet end of the second heat exchanger 3 and the reheat steam outlet end of the cogeneration unit 1, and the flow directions of the main steam and the reheat steam of the cogeneration unit 1 are conveniently controlled by the arrangement of the first switch valve 9 and the second switch valve 10, so that the cogeneration unit 1 can be switched between power generation and steam supply stably.
The first switching valve 9 may be a manual switching valve or an electric switching valve.
The second switching valve 10 may be a manual switching valve or an electric switching valve.
When the first flow regulating valve 5, the second flow regulating valve 6, the third flow regulating valve 7, the fourth flow regulating valve 8, the first switch valve 9 and the second switch valve 10 are all electric valves, the industrial steam supply system may further include a controller, and the output end of the controller is electrically connected with the input ends of the variable-frequency booster pump 4, the first flow regulating valve 5, the second flow regulating valve 6, the third flow regulating valve 7, the fourth flow regulating valve 8, the first switch valve 9 and the second switch valve 10 respectively. It can be understood that the automatic control of the whole industrial steam supply system is facilitated through the arrangement of the controller, so that the whole industrial steam supply system is more convenient to use.
As shown in fig. 1, in some embodiments, the cogeneration unit 1 includes a boiler 11, a high pressure cylinder 12, a middle pressure cylinder 13, and a low pressure cylinder 14, the main steam outlet end of the boiler 11 is connected to the hot side steam inlet end of the first heat exchanger 2, the reheat steam outlet end of the boiler 11 is connected to the hot side steam inlet end of the second heat exchanger 3, the steam inlet end of the high pressure cylinder 12 is connected to the main steam outlet end of the boiler 11, the steam outlet end of the high pressure cylinder 12 is connected to the reheat steam inlet end of the boiler 11, the steam inlet end of the middle pressure cylinder 13 is connected to the reheat steam outlet end of the boiler 11, and the steam inlet end of the low pressure cylinder 14 is connected to the steam outlet end of the middle pressure cylinder 13 and the hot side steam outlet end of the second heat exchanger 3.
It can be understood that after the boiler 11 heats water into main steam, a part of the main steam enters the hot side of the first heat exchanger 2, the rest part enters the high-pressure cylinder 12 to perform work and generate electricity, the steam after the work in the high-pressure cylinder 12 enters the boiler 11 again to reheat to form reheat steam, a part of the reheat steam enters the hot side of the second heat exchanger 3, the rest part enters the middle pressure cylinder 13 to perform work and generate electricity, the steam after the work in the middle pressure cylinder 13 enters the low pressure cylinder 14 to perform work and generate electricity, and meanwhile, the steam after the heat exchange on the hot side of the second heat exchanger 3 also enters the low pressure cylinder 14 to perform work and generate electricity. Therefore, the cogeneration unit 1 realizes power generation by utilizing the main steam and the reheat steam, and meets the power demand.
As shown in fig. 1, in some embodiments, the cogeneration unit 1 further includes a condenser 15 and a deaerator 16, the hot side steam inlet end of the condenser 15 is connected to the steam outlet end of the low pressure cylinder 14, cooling water is introduced into the cold side of the condenser 15, the liquid inlet end of the deaerator 16 is connected to the hot side liquid outlet end of the condenser 15 and the hot side liquid outlet end of the first heat exchanger 2, and the liquid outlet end of the deaerator 16 is connected to the main steam liquid inlet end of the boiler 11 and the cold side liquid inlet end of the first heat exchanger 2.
It can be understood that the steam after working in the low pressure cylinder 14 enters the hot side of the condenser 15, and the steam after working in the low pressure cylinder 14 is condensed into condensed water for recycling under the cooling of the cooling water in the cold side of the condenser 15, and the condensed water enters the deaerator 16 to deaerate, so as to reduce the oxygen content in the condensed water, reduce the corrosion of the condensed water to each component in the industrial steam supply system, and effectively prolong the service life of the industrial steam supply system.
As shown in fig. 1, in some embodiments, the cogeneration unit 1 further includes a condensate pump 17 and a deaeration water pump 18, the condensate pump 17 is disposed between the liquid inlet end of the deaerator 16 and the hot-side liquid outlet end of the condenser 15, the liquid inlet end of the condensate pump 17 is connected to the hot-side liquid outlet end of the condenser 15, the liquid outlet end of the condensate pump 17 is connected to the liquid inlet end of the deaerator 16, the deaeration water pump 18 is disposed between the liquid outlet end of the deaerator 16 and the main steam liquid inlet end of the boiler 11, the liquid inlet end of the deaeration water pump 18 is connected to the liquid outlet end of the deaerator 16, and the liquid outlet end of the deaeration water pump 18 is connected to the main steam liquid inlet end of the boiler 11.
It can be understood that the condensate pump 17 pressurizes and conveys the condensate water at the hot side outlet end of the condenser 15 to the deaerator 16, and the deaeration water pump 18 pressurizes and conveys the deaerated water at the outlet end of the deaerator 16 to the boiler 11, so that stable deaeration and recycling of the condensate water are ensured through the arrangement of the condensate pump 17 and the deaeration water pump 18.
As shown in fig. 1, in some embodiments, the cogeneration unit 1 further includes a high-pressure heater 19 and a low-pressure heater 20, the hot-side steam inlet end of the high-pressure heater 19 is connected to the steam outlet end of the high-pressure cylinder 12 and the steam outlet end of the medium-pressure cylinder 13, the hot-side steam outlet end of the high-pressure heater 19 is connected to the steam inlet end of the deaerator 16, the cold side of the high-pressure heater 19 is disposed between the steam outlet end of the deaerator water pump 18 and the main steam inlet end of the boiler 11, the cold-side liquid inlet end of the high-pressure heater 19 is connected to the liquid outlet end of the deaerator water pump 18, the cold-side liquid outlet end of the high-pressure heater 19 is connected to the main steam inlet end of the boiler 11, the hot-side steam outlet end of the low-pressure heater 20 is connected to the steam outlet end of the medium-pressure cylinder 13 and the steam outlet end of the low-pressure cylinder 14, the hot-side steam outlet end of the low-pressure heater 20 is connected to the liquid inlet end of the condensate water pump 17, the cold side of the low-pressure heater 20 is disposed between the liquid outlet end of the condensate water pump 17 and the liquid inlet end of the deaerator 16, and the cold-side liquid inlet end of the low-pressure heater 20 is connected to the liquid inlet end of the condensate pump 16.
It will be appreciated that part of the steam at the steam outlet end of the medium pressure cylinder 13 and part of the steam at the steam outlet end of the low pressure cylinder 14 pass through the hot side of the low pressure heater 20 and then enter the liquid inlet end of the condensate pump 17, so that when the condensate passes through the cold side of the low pressure heater 20, the condensate is heated by the steam at the hot side of the low pressure heater 20, and the heated condensate enters the deaerator 16; meanwhile, part of steam at the steam outlet end of the high-pressure cylinder 12 and part of steam at the steam outlet end of the medium-pressure cylinder 13 pass through the hot side of the high-pressure heater 19 and then enter the deaerator 16, so that when part of deaerated water passes through the cold side of the high-pressure heater 19, the deaerated water is heated by the steam at the hot side of the high-pressure heater 19, and the heated deaerated water enters the boiler 11. By arranging the high-pressure heater 19 and the low-pressure heater 20, the energy loss of the boiler 11 can be effectively reduced, and the heating efficiency of deoxygenated water can be improved.
When the steam is required to be supplied, the first switch valve 9, the second switch valve 10, the variable-frequency booster pump 4, the first flow regulating valve 5, the second flow regulating valve 6, the third flow regulating valve 7 and the fourth flow regulating valve 8 are opened, meanwhile, based on different steam requirements, the frequency of the variable-frequency booster pump 4 can be controlled to regulate the pressure of the superheated steam, the opening degree of the first flow regulating valve 5 and the opening degree of the second flow regulating valve 6 are controlled to regulate the flow of the superheated steam, and the opening degree of the third flow regulating valve 7 and the opening degree of the fourth flow regulating valve 8 are controlled to regulate the temperature of the superheated steam.
When the steam supply is not needed, the first switch valve 9, the second switch valve 10, the variable frequency booster pump 4, the first flow rate regulating valve 5, the second flow rate regulating valve 6, the third flow rate regulating valve 7 and the fourth flow rate regulating valve 8 are closed, so that the cogeneration unit 1 only generates power.
It should be noted that in the description of the present disclosure, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present disclosure in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the present disclosure, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the present disclosure.

Claims (10)

1. An industrial steam supply system based on a steam heat source, comprising:
a cogeneration unit;
a first heat exchanger, the hot side steam inlet end of the first heat exchanger is connected with the main steam outlet end of the cogeneration unit, the hot side liquid outlet end of the first heat exchanger is connected with the condensed water liquid outlet end of the cogeneration unit, and the cold side liquid outlet end of the first heat exchanger is connected with the deoxygenated water liquid outlet end of the cogeneration unit;
the hot side steam inlet end of the second heat exchanger is connected with the reheat steam outlet end of the cogeneration unit, the hot side steam outlet end of the second heat exchanger is connected with the low-pressure steam inlet end of the cogeneration unit, the cold side steam inlet end of the second heat exchanger is connected with the cold side steam outlet end of the first heat exchanger, and the cold side steam outlet end of the second heat exchanger is connected with the steam inlet end of the steam using equipment.
2. The industrial steam supply system based on a steam heat source of claim 1, further comprising:
the variable-frequency booster pump is arranged between the cold side liquid inlet end of the first heat exchanger and the deoxidized water liquid outlet end of the cogeneration unit, the liquid inlet end of the variable-frequency booster pump is connected with the deoxidized water liquid outlet end of the cogeneration unit, and the liquid outlet end of the variable-frequency booster pump is connected with the cold side liquid inlet end of the first heat exchanger.
3. The industrial steam supply system based on a steam heat source of claim 2, further comprising:
the first flow regulating valve is arranged between the liquid inlet end of the variable-frequency booster pump and the deoxygenated water liquid outlet end of the cogeneration unit, the liquid inlet end of the first flow regulating valve is connected with the deoxygenated water liquid outlet end of the cogeneration unit, and the liquid outlet end of the first flow regulating valve is connected with the liquid inlet end of the variable-frequency booster pump.
4. The industrial steam supply system based on a steam heat source of claim 3, further comprising:
the second flow regulating valve is arranged between the cold side steam outlet end of the second heat exchanger and the steam inlet end of the steam utilization device, the steam inlet end of the second flow regulating valve is connected with the cold side steam outlet end of the second heat exchanger, and the steam outlet end of the second flow regulating valve is connected with the steam inlet end of the steam utilization device.
5. The industrial steam supply system based on a steam heat source of claim 1, further comprising:
the third flow regulating valve is arranged between the hot side liquid outlet end of the first heat exchanger and the condensed water liquid outlet end of the cogeneration unit, the liquid inlet end of the third flow regulating valve is connected with the hot side liquid outlet end of the first heat exchanger, and the liquid outlet end of the third flow regulating valve is connected with the condensed water liquid outlet end of the cogeneration unit;
the fourth flow regulating valve is arranged between the hot side steam outlet end of the second heat exchanger and the low-pressure steam inlet end of the cogeneration unit, the steam inlet end of the fourth flow regulating valve is connected with the hot side steam outlet end of the second heat exchanger, and the steam outlet end of the fourth flow regulating valve is connected with the low-pressure steam inlet end of the cogeneration unit.
6. The industrial steam supply system based on a steam heat source of claim 5, further comprising:
the first switch valve is arranged between the hot side steam inlet end of the first heat exchanger and the main steam outlet end of the cogeneration unit, the steam inlet end of the first switch valve is connected with the main steam outlet end of the cogeneration unit, and the steam outlet end of the first switch valve is connected with the hot side steam inlet end of the first heat exchanger;
the second switch valve is arranged between the hot side steam inlet end of the second heat exchanger and the reheat steam outlet end of the cogeneration unit, the steam inlet end of the second switch valve is connected with the reheat steam outlet end of the cogeneration unit, and the steam outlet end of the second switch valve is connected with the hot side steam inlet end of the second heat exchanger.
7. The industrial steam supply system based on a steam heat source according to any one of claims 1 to 6, wherein the cogeneration unit comprises:
the main steam outlet end of the boiler is connected with the hot side steam inlet end of the first heat exchanger, and the reheat steam outlet end of the boiler is connected with the hot side steam inlet end of the second heat exchanger;
the steam inlet end of the high-pressure cylinder is connected with the main steam outlet end of the boiler, and the steam outlet end of the high-pressure cylinder is connected with the reheat steam inlet end of the boiler;
the steam inlet end of the medium pressure cylinder is connected with the steam outlet end of reheat steam of the boiler;
and the steam inlet end of the low-pressure cylinder is connected with the steam outlet end of the medium-pressure cylinder and the hot side steam outlet end of the second heat exchanger.
8. The industrial steam supply system based on a steam heat source of claim 7, wherein the cogeneration unit further comprises:
the hot side steam inlet end of the condenser is connected with the steam outlet end of the low-pressure cylinder, and cooling water is introduced into the cold side of the condenser;
the liquid outlet end of the deaerator is connected with the main steam liquid inlet end of the boiler and the cold side liquid inlet end of the first heat exchanger.
9. The industrial steam supply system based on a steam heat source of claim 8, wherein the cogeneration unit further comprises:
the condensate pump is arranged between the liquid inlet end of the deaerator and the hot side liquid outlet end of the condenser, the liquid inlet end of the condensate pump is connected with the hot side liquid outlet end of the condenser, and the liquid outlet end of the condensate pump is connected with the liquid inlet end of the deaerator;
the deoxygenation water pump is arranged between the liquid outlet end of the deoxygenator and the main steam liquid inlet end of the boiler, the liquid inlet end of the deoxygenation water pump is connected with the liquid outlet end of the deoxygenator, and the liquid outlet end of the deoxygenation water pump is connected with the main steam liquid inlet end of the boiler.
10. The industrial steam supply system based on a steam heat source of claim 9, wherein the cogeneration unit further comprises:
the hot side steam inlet end of the high-pressure heater is respectively connected with the steam outlet end of the high-pressure cylinder and the steam outlet end of the medium-pressure cylinder, the hot side steam outlet end of the high-pressure heater is connected with the steam inlet end of the deaerator, the cold side of the high-pressure heater is arranged between the liquid outlet end of the deaeration water pump and the main steam liquid inlet end of the boiler, the liquid outlet end of the cold side of the high-pressure heater is connected with the liquid outlet end of the deaeration water pump, and the liquid outlet end of the cold side of the high-pressure heater is connected with the main steam liquid inlet end of the boiler;
the low-pressure heater, the hot side steam inlet end of low-pressure heater with the play vapour end of well pressure jar reaches the play vapour end of low pressure jar links to each other respectively, the hot side steam outlet end of low-pressure heater with the feed liquor end of condensate pump links to each other, the cold side setting of low-pressure heater is in the play liquid end of condensate pump with between the feed liquor end of deaerator links to each other, the cold side feed liquor end of low-pressure heater with the play liquid end of condensate pump links to each other, the cold side play liquid end of low-pressure heater with the feed liquor end of deaerator links to each other.
CN202211095552.6A 2022-09-06 2022-09-06 Industrial steam supply system based on steam heat source Pending CN116255213A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211095552.6A CN116255213A (en) 2022-09-06 2022-09-06 Industrial steam supply system based on steam heat source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211095552.6A CN116255213A (en) 2022-09-06 2022-09-06 Industrial steam supply system based on steam heat source

Publications (1)

Publication Number Publication Date
CN116255213A true CN116255213A (en) 2023-06-13

Family

ID=86678131

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211095552.6A Pending CN116255213A (en) 2022-09-06 2022-09-06 Industrial steam supply system based on steam heat source

Country Status (1)

Country Link
CN (1) CN116255213A (en)

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