CN218624356U - Pressure reduction adjustment two-stage industrial steam supply system based on steam heat source - Google Patents
Pressure reduction adjustment two-stage industrial steam supply system based on steam heat source Download PDFInfo
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- CN218624356U CN218624356U CN202222373144.4U CN202222373144U CN218624356U CN 218624356 U CN218624356 U CN 218624356U CN 202222373144 U CN202222373144 U CN 202222373144U CN 218624356 U CN218624356 U CN 218624356U
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Abstract
The present disclosure provides a two-stage industrial steam supply system with pressure reduction regulation based on a steam heat source, comprising: the liquid inlet end of the pressure reducing valve is connected with the liquid inlet end of main steam of a boiler of the cogeneration unit; and the hot side steam inlet end of the second heat exchanger is connected with the reheated steam outlet end of the cogeneration unit, the hot side steam outlet end of the second heat exchanger is connected with the steam inlet end of the low-pressure steam consuming equipment, 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 high-pressure steam consuming equipment. In this disclosed pressure reduction regulation doublestage industry steam supply system based on steam heat source, can satisfy different vapour demands, and high pressure supplies vapour ability to promote greatly, avoids receiving the influence of factors such as reheat overtemperature, degree of depth peak regulation.
Description
Technical Field
The disclosure relates to the technical field of industrial steam supply, in particular to a pressure reduction adjustment double-stage industrial steam supply system based on a steam heat source.
Background
Steam is one of raw materials needed by production processes in various industries, and although more industries only need low-pressure steam, part of the industries need high-pressure steam of more than 4MPa, such as: chemical industry, petroleum industry and the like. For steam production, a conventional scheme is that a small-scale steam boiler is built by a steam enterprise to meet the steam demand, but the problem of air pollution is easily caused by the fact that a large number of small-scale steam boilers are arranged, the efficiency of the steam boiler built by the enterprise is low, and the production cost of the enterprise is increased seriously. Therefore, large cogeneration units are required for centralized steam supply.
At present, the cogeneration unit usually adopts main steam to supply vapour, but this kind of mode receives the restriction of boiler reheat overtemperature easily, leads to the steam supply less, and when facing the degree of depth peak regulation, the steam supply ability of cogeneration unit still can further descend, can't satisfy the vapour demand, and simultaneously, the mode that only adopts main steam to supply vapour still is difficult to satisfy the vapour demand of using of low pressure steam.
Disclosure of Invention
The present disclosure is directed to solving, at least to some extent, one of the technical problems in the related art.
To this end, it is an object of the present disclosure to provide a reduced pressure regulated dual stage industrial steam supply system based on a steam heat source.
To achieve the above objects, the present disclosure provides a pressure-reducing regulation two-stage industrial steam supply system based on a steam heat source, comprising: a cogeneration unit; the liquid inlet end of the pressure reducing valve is connected with the liquid inlet end of main boiler steam of the cogeneration unit; 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 liquid outlet end of the pressure reducing valve; and the hot side steam inlet end of the second heat exchanger is connected with the reheated steam outlet end of the cogeneration unit, the hot side steam outlet end of the second heat exchanger is connected with the steam inlet end of the low-pressure steam consuming equipment, 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 high-pressure steam consuming equipment.
Optionally, the industrial steam supply system further includes: and the temperature and pressure reducing device is arranged between the steam outlet end of the hot side of the second heat exchanger and the steam inlet end of the low-pressure steam equipment, the steam inlet end of the temperature and pressure reducing device is connected with the steam outlet end of the hot side of the second heat exchanger, and the steam outlet end of the temperature and pressure reducing device is connected with the steam inlet end of the low-pressure steam equipment.
Optionally, the dual-stage industrial steam supply system further includes: first flow control valve, first flow control valve sets up the feed liquor end of relief pressure valve with the boiler owner steam feed liquor end of combined heat and power generation unit links to each other between, the feed liquor end of first flow control valve with the boiler owner steam feed liquor end of combined heat and power generation unit links to each other, the play liquid end of first flow control valve with the feed liquor end of relief pressure valve links to each other.
Optionally, the dual-stage industrial steam supply system further includes: 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 high-pressure steam equipment, 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 high-pressure steam equipment.
Optionally, the dual-stage industrial steam supply system further includes: 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; and the fourth flow regulating valve is arranged between the steam outlet end of the temperature and pressure reducing device and the steam inlet end of the low-pressure steam equipment, the steam inlet end of the fourth flow regulating valve is connected with the steam outlet end of the temperature and pressure reducing device, and the steam outlet end of the fourth flow regulating valve is connected with the steam inlet end of the low-pressure steam equipment.
Optionally, the dual-stage industrial steam supply system further includes: the first switch valve is arranged between the steam inlet end at the hot side of the first heat exchanger and the connection of the steam outlet end of the main steam of the cogeneration unit, the steam inlet end of the first switch valve is connected with the steam outlet end of the main steam of the cogeneration unit, and the steam outlet end of the first switch valve is connected with the steam inlet end at the hot side of the first heat exchanger; and the second switch valve is arranged between the hot side steam inlet end of the second heat exchanger and the reheated steam outlet end of the cogeneration unit, the steam inlet end of the second switch valve is connected with the reheated 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 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 intermediate pressure cylinder is connected with the steam outlet end of the reheated 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.
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; and the liquid inlet end of the deaerator is connected with the liquid outlet end of the hot side of the condenser and the liquid outlet end of the hot side of the first heat exchanger, and the liquid outlet end of the deaerator is connected with the liquid inlet end of the main steam of the boiler and the liquid inlet end of the pressure reducing valve.
Optionally, the cogeneration unit further comprises: the condensate pump is arranged between the liquid inlet end of the deaerator and the liquid outlet end at the hot side of the condenser, the liquid inlet end of the condensate pump is connected with the liquid outlet end at the hot side of the condenser, and the liquid outlet end of the condensate pump is connected with the liquid inlet end of the deaerator; the feed pump, the feed pump sets up the play liquid end of oxygen-eliminating device with the main steam feed liquor end of boiler reaches between the feed liquor end of relief pressure valve links to each other, the feed liquor end of feed pump with the play liquid end of oxygen-eliminating device links to each other, the play liquid end of feed pump with the main steam feed liquor end of boiler reaches the feed liquor end of relief pressure valve links to each other.
Optionally, the cogeneration unit further comprises: the hot side steam inlet end of the high-pressure heater is connected with the steam outlet end of the high-pressure cylinder and the steam outlet end of the medium-pressure cylinder respectively, 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 water feed pump and the connection of the main steam liquid inlet end of the boiler and the liquid inlet end of the pressure reducing valve, the cold side liquid inlet end of the high-pressure heater is connected with the liquid outlet end of the water feed pump, and the cold side liquid outlet end of the high-pressure heater is connected with the main steam liquid inlet end of the boiler and the liquid inlet end of the pressure reducing valve; the low pressure feed water heater, low pressure feed water heater's hot side steam inlet end respectively with the steam outlet end of intermediate pressure jar reaches the steam outlet end of low pressure jar links to each other, low pressure feed water heater's hot side play liquid end with the hot side steam inlet end of condenser links to each other, low pressure feed water heater's cold side sets up condensate pump's play liquid end with between the feed liquor end of oxygen-eliminating device links to each other, low pressure feed water heater's feed liquor cold side end with condensate pump's play liquid end links to each other, low pressure feed water heater's cold side play liquid end with the feed liquor end of oxygen-eliminating device links to each other.
The technical scheme provided by the disclosure can comprise the following beneficial effects:
part of main steam of the cogeneration unit passes through the hot side of the first heat exchanger, and part of reheated steam of the cogeneration unit passes through the hot side of the second heat exchanger, so that part of deoxygenated water of the cogeneration unit is heated into saturated steam by the main steam at the hot side of the first heat exchanger when passing through the cold side of the first heat exchanger, the saturated steam is heated into superheated steam by the reheated steam at the hot side of the second heat exchanger when passing through the cold side of the second heat exchanger, the superheated steam is supplied to high-pressure steam equipment for use, and the reheated steam at the hot side of the second heat exchanger is supplied to low-pressure steam equipment for use after the heating of the saturated steam is completed, so that double-stage centralized steam supply is realized, and different steam requirements are met.
The liquid inlet of the main steam inlet end of the boiler of the cogeneration unit is used as a water source, and the main steam and the reheated steam of the cogeneration unit are used as heat sources, so that the high-pressure steam supply capacity of the two-stage industrial steam supply system is greatly improved, the two-stage industrial steam supply system can still stably supply high-pressure steam when the main steam amount of the cogeneration unit is reduced, and the influence of factors such as reheating overtemperature, depth peak regulation and the like is avoided; the pressure reducing valve heats partial liquid inlet of the main steam inlet end of the boiler into superheated steam through the cold side of the first heat exchanger and the cold side of the second heat exchanger, the pressure of the superheated steam can meet the use requirement of high-pressure steam equipment, and the pressure regulation of the superheated steam can be realized by controlling the pressure threshold value of the pressure reducing valve, so that the high-pressure steam requirements of different parameters are met; the double-stage industrial steam supply system is only provided with the pressure reducing valve, the first heat exchanger and the second heat exchanger on the cogeneration unit, has a simple structure, 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 above 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 of which:
FIG. 1 is a schematic structural diagram of a pressure reducing and regulating dual-stage industrial steam supply system based on a steam heat source according to an embodiment of the disclosure;
as shown in the figure: 1. the heat and power cogeneration unit comprises a cogeneration unit 2, a pressure reducing valve 3, a first heat exchanger 4, a second heat exchanger 5, a temperature and pressure reducing device 6, a first flow regulating valve 7, a second flow regulating valve 8, a third flow regulating valve 9, a fourth flow regulating valve 10, a first switch valve 11, a second switch valve 12, a boiler 13, a high pressure cylinder 14, an intermediate pressure cylinder 15, a low pressure cylinder 16, a condenser 17, a deaerator 18, a condensate pump 19, a feed pump 20, a high pressure heater 21 and a low pressure heater.
Detailed Description
Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present disclosure, and are not to be construed as limiting the present disclosure. Rather, the embodiments of the disclosure include all changes, modifications and equivalents coming within the spirit and terms of the claims appended thereto.
As shown in fig. 1, the embodiment of the present disclosure provides a pressure reduction regulation two-stage industrial steam supply system based on a steam heat source, which includes a cogeneration unit 1, a pressure reducing valve 2, a first heat exchanger 3 and a second heat exchanger 4, wherein a liquid inlet end of the pressure reducing valve 2 is connected to a main steam inlet end of a boiler of the cogeneration unit 1, a hot side steam inlet end of the first heat exchanger 3 is connected to a main steam outlet end of the cogeneration unit 1, a hot side liquid outlet end of the first heat exchanger 3 is connected to a condensed water liquid outlet end of the cogeneration unit 1, a cold side liquid inlet end of the first heat exchanger 3 is connected to a liquid outlet end of the pressure reducing valve 2, a hot side steam inlet end of the second heat exchanger 4 is connected to a reheat steam outlet end of the cogeneration unit 1, a hot side steam outlet end of the second heat exchanger 4 is connected to a steam inlet end of a low-pressure steam-using device, a cold side steam inlet end of the second heat exchanger 4 is connected to a cold side steam outlet end of the first heat exchanger 3, and a cold side steam outlet end of the second heat exchanger 4 is connected to a steam inlet end of a high-pressure steam-using device.
It can be understood that part of main steam of the cogeneration unit 1 passes through the hot side of the first heat exchanger 3, and part of reheated steam of the cogeneration unit 1 passes through the hot side of the second heat exchanger 4, so that the feed liquid of the main steam feed end of the part of the boiler of the cogeneration unit 1 is heated into saturated steam by the main steam at the hot side of the first heat exchanger 3 when passing through the cold side of the first heat exchanger 3, the saturated steam is heated into superheated steam by the reheated steam at the hot side of the second heat exchanger 4 when passing through the cold side of the second heat exchanger 4, the superheated steam is supplied to high-pressure steam equipment, and the reheated steam at the hot side of the second heat exchanger 4 is supplied to low-pressure steam equipment after the saturated steam is heated, thereby realizing double-stage centralized steam supply and meeting different steam requirements.
The liquid inlet of the main steam inlet end of the boiler of the cogeneration unit 1 is used as a water source, and the main steam and the reheated steam of the cogeneration unit 1 are used as heat sources, so that the high-pressure steam supply capacity of the two-stage industrial steam supply system is greatly improved, the two-stage industrial steam supply system can still stably supply the high-pressure steam when the main steam quantity of the cogeneration unit 1 is reduced, and the influence of factors such as reheating overtemperature, depth peak regulation and the like is avoided.
After the pressure reducing valve 2 heats part of liquid inlet of the main steam inlet end of the boiler to superheated steam through the cold side of the first heat exchanger 3 and the cold side of the second heat exchanger 4, the pressure of the liquid inlet can meet the use requirement of high-pressure steam equipment, and the pressure threshold of the pressure reducing valve 2 is controlled to realize the pressure regulation of the superheated steam, so that the high-pressure steam requirements of different parameters are met.
The double-stage industrial steam supply system is only provided with the pressure reducing valve 2, the first heat exchanger 3 and the second heat exchanger 4 on the cogeneration unit 1, has 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.
It should be noted that the first heat exchanger 3 and the second heat exchanger 4 both include a hot side and a cold side for heat exchange, and the hot side and the cold side can directly exchange heat or indirectly exchange heat through a heat exchange medium or the like.
The pressure threshold of the pressure reducing valve 2 may be controlled manually or automatically.
The high-pressure steam refers to high-parameter steam with the pressure of more than 4MPa, and the low-pressure steam refers to low-parameter steam with the pressure of 1-3 MPa.
As shown in fig. 1, in some embodiments, the industrial steam supply system further includes a temperature and pressure reducing device 5, where the temperature and pressure reducing device 5 is disposed between the connection between the steam outlet end of the hot side of the second heat exchanger 4 and the steam inlet end of the low-pressure steam consuming equipment, the steam inlet end of the temperature and pressure reducing device 5 is connected to the steam outlet end of the hot side of the second heat exchanger 4, and the steam outlet end of the temperature and pressure reducing device 5 is connected to the steam inlet end of the low-pressure steam consuming equipment.
It can be understood that steam at the steam outlet end of the hot side of the second heat exchanger 4 passes through the temperature and pressure reduction device 5 to reduce the temperature and pressure to form low-temperature low-pressure steam, so that the steam utilization requirement of low-pressure steam utilization equipment is met, and the temperature regulation and the pressure regulation of the steam at the steam outlet end of the hot side of the second heat exchanger 4 can be realized by controlling the temperature threshold value and the pressure threshold value of the temperature and pressure reduction device 5, so that the low-pressure and low-temperature steam utilization requirements of different parameters are met.
The temperature and pressure reducing device 5 may be the temperature and pressure reducing valve 2 or other temperature and pressure reducing devices. The temperature and pressure reducing device 5 can reduce the temperature by cooling water, cooling oil, or the like.
The temperature threshold and the pressure threshold of the temperature and pressure reduction device 5 can be controlled manually or automatically.
As shown in fig. 1, in some embodiments, the two-stage industrial steam supply system further includes a first flow regulating valve 6, the first flow regulating valve 6 is disposed between the inlet end of the pressure reducing valve 2 and the inlet end of the main steam of the boiler of the cogeneration unit 1, the inlet end of the first flow regulating valve 6 is connected to the inlet end of the main steam of the boiler of the cogeneration unit 1, and the outlet end of the first flow regulating valve 6 is connected to the inlet end of the pressure reducing valve 2.
It can be understood that partial feed liquor at the main steam feed end of the boiler of the cogeneration unit 1 enters the pressure reducing valve 2, the cold side of the first heat exchanger 3 and the cold side of the second heat exchanger 4 after passing through the first flow regulating valve 6, so that the flow regulation of the superheated steam is realized by controlling the opening degree of the first flow regulating valve 6, and the use requirements of the high-pressure steam with different flows are further met.
It should be noted that the first flow regulating valve 6 may be a manual regulating valve or an automatic regulating valve, and a flow meter may be further disposed on a pipeline between a liquid inlet end of the pressure reducing valve 2 and a liquid inlet end of main steam of a boiler of the cogeneration unit 1, so as to cooperate with the first flow regulating valve 6 to realize accurate regulation of flow.
As shown in fig. 1, in some embodiments, the dual-stage industrial steam supply system further includes a second flow regulating valve 7, the second flow regulating valve 7 is disposed between the cold-side steam outlet of the second heat exchanger 4 and the steam inlet of the high-pressure steam consuming equipment, the steam inlet of the second flow regulating valve 7 is connected to the cold-side steam outlet of the second heat exchanger 4, and the steam outlet of the second flow regulating valve 7 is connected to the steam inlet of the high-pressure steam consuming equipment.
It can be understood that the superheated steam at the cold side steam outlet end of the second heat exchanger 4 enters the high-pressure steam consuming equipment after passing through the second flow regulating valve 7, so that the flow of the superheated steam is regulated by controlling the opening degree of the second flow regulating valve 7, and the flow of the superheated steam is regulated more accurately by matching the second flow regulating valve 7 with the first flow regulating valve 6.
It should be noted that the second flow regulating valve 7 may be a manual regulating valve or an automatic regulating valve, and a flow meter may also be disposed on a pipeline between the cold side steam outlet of the second heat exchanger 4 and the steam inlet of the high pressure steam equipment, so as to cooperate with the second flow regulating valve 7 to realize accurate regulation of flow.
As shown in fig. 1, in some embodiments, the two-stage industrial steam supply system further includes a third flow regulating valve 8 and a fourth flow regulating valve 9, the third flow regulating valve 8 is disposed between a hot-side liquid outlet end of the first heat exchanger 3 and a condensed water liquid outlet end of the cogeneration unit 1, a liquid inlet end of the third flow regulating valve 8 is connected to a hot-side liquid outlet end of the first heat exchanger 3, a liquid outlet end of the third flow regulating valve 8 is connected to a condensed water liquid outlet end of the cogeneration unit 1, the fourth flow regulating valve 9 is disposed between a steam outlet end of the temperature and pressure reducing device 5 and a steam inlet end of the low-pressure steam equipment, a steam inlet end of the fourth flow regulating valve 9 is connected to a steam outlet end of the temperature and pressure reducing device 5, and a steam outlet end of the fourth flow regulating valve 9 is connected to a steam inlet end of the low-pressure steam equipment.
It can be understood that the outlet liquid at the outlet end of the hot side of the first heat exchanger 3 enters the outlet end of condensed water of the cogeneration unit 1 after passing through the third flow control valve 8, so that the flow of main steam at the hot side of the first heat exchanger 3 is adjusted by controlling the opening degree of the third flow control valve 8, and the steam at the outlet end of the temperature and pressure reducing device 5 enters the steam inlet end of the low-pressure steam equipment after passing through the fourth flow control valve 9, so that the flow of reheated steam at the hot side of the second heat exchanger 4 is adjusted by controlling the opening degree of the fourth flow control valve 9. Therefore, the temperature of the superheated steam is controlled by the arrangement of the third flow regulating valve 8 and the fourth flow regulating valve 9, so that the use requirements of high-pressure steam with different temperatures are met.
It should be noted that the third flow regulating valve 8 may be a manual regulating valve or an automatic regulating valve, and a flow meter may also be arranged on a pipeline between the connection of the hot side liquid outlet end of the first heat exchanger 3 and the condensed water liquid outlet end of the cogeneration unit 1, so as to cooperate with the third flow regulating valve 8 to realize accurate regulation of the flow rate.
The fourth flow regulating valve 9 may be a manual regulating valve or an automatic regulating valve, and a flow meter may be provided on a pipeline between the steam outlet of the temperature and pressure reducing device 5 and the steam inlet of the low-pressure steam consuming apparatus, so as to cooperate with the fourth flow regulating valve 9 to realize accurate regulation of flow.
As shown in fig. 1, in some embodiments, the two-stage industrial steam supply system further includes a first switch valve 10 and a second switch valve 11, the first switch valve 10 is disposed between the steam inlet end of the hot side of the first heat exchanger 3 and the steam outlet end of the main steam of the cogeneration unit 1, the steam inlet end of the first switch valve 10 is connected to the steam outlet end of the main steam of the cogeneration unit 1, the steam outlet end of the first switch valve 10 is connected to the steam inlet end of the hot side of the first heat exchanger 3, the second switch valve 11 is disposed between the steam inlet end of the hot side of the second heat exchanger 4 and the steam outlet end of the reheat steam of the cogeneration unit 1, the steam inlet end of the second switch valve 11 is connected to the steam outlet end of the reheat steam of the cogeneration unit 1, and the steam outlet end of the second switch valve 11 is connected to the steam inlet end of the hot side of the second heat exchanger 4.
It can be understood that the first switch valve 10 is used for switching between the hot side steam inlet end of the first heat exchanger 3 and the main steam outlet end of the cogeneration unit 1, the second switch valve 11 is used for switching between the hot side steam inlet end of the second heat exchanger 4 and the reheated steam outlet end of the cogeneration unit 1, and by the arrangement of the first switch valve 10 and the second switch valve 11, the flow directions of the main steam and the reheated steam of the cogeneration unit 1 are conveniently controlled, and the cogeneration unit 1 can be stably switched between power generation and steam supply.
The first on-off valve 10 may be a manual on-off valve or an electric on-off valve.
The second on-off valve 11 may be a manual on-off valve or an electric on-off valve.
When the reducing valve 2, the temperature and pressure reducing device 5, the first flow regulating valve 6, the second flow regulating valve 7, the third flow regulating valve 8, the fourth flow regulating valve 9, the first switch valve 10 and the second switch valve 11 are all electrically controlled, the two-stage industrial steam supply system can further comprise a controller, and the output end of the controller is electrically connected with the input ends of the reducing valve 2, the temperature and pressure reducing device 5, the first flow regulating valve 6, the second flow regulating valve 7, the third flow regulating valve 8, the fourth flow regulating valve 9, the first switch valve 10 and the second switch valve 11 respectively. It can be understood that the overall automatic control of the double-stage industrial steam supply system is facilitated through the arrangement of the controller, and the overall use of the double-stage industrial steam supply system is more convenient.
As shown in fig. 1, in some embodiments, the cogeneration unit 1 includes a boiler 12, a high pressure cylinder 13, an intermediate pressure cylinder 14 and a low pressure cylinder 15, wherein a main steam outlet of the boiler 12 is connected to a hot side steam inlet of the first heat exchanger 3, a reheat steam outlet of the boiler 12 is connected to a hot side steam inlet of the second heat exchanger 4, a steam inlet of the high pressure cylinder 13 is connected to a main steam outlet of the boiler 12, a steam outlet of the high pressure cylinder 13 is connected to a reheat steam inlet of the boiler 12, a steam inlet of the intermediate pressure cylinder 14 is connected to a reheat steam outlet of the boiler 12, and a steam inlet of the low pressure cylinder 15 is connected to a steam outlet of the intermediate pressure cylinder 14.
It can be understood that, after the boiler 12 heats water into main steam, a part of the main steam enters the hot side of the first heat exchanger 3 through the pressure reducing valve 2, the other part of the main steam enters the high pressure cylinder 13 to do work and generate power, the steam after doing work in the high pressure cylinder 13 enters the boiler 12 again to be reheated to form high temperature reheated steam, a part of the high temperature reheated steam enters the hot side of the second heat exchanger 4, the other part of the high temperature reheated steam enters the intermediate pressure cylinder 14 to do work and generate power, and the steam after doing work in the intermediate pressure cylinder 14 enters the low pressure cylinder 15 to do work and generate power. Therefore, the cogeneration unit 1 generates power by using the main steam and the high-temperature reheat steam, and meets the power demand.
It should be noted that when the two-stage industrial steam supply system supplies steam at a high pressure and does not need to supply steam at a low pressure, the steam at the steam outlet end of the hot side of the second heat exchanger 4 can be directly conveyed to the low-pressure cylinder 15 to do work and generate power without passing through the temperature and pressure reducing device 5.
As shown in fig. 1, in some embodiments, the cogeneration unit 1 further includes a condenser 16 and a deaerator 17, a hot side steam inlet end of the condenser 16 is connected to a steam outlet end of the low pressure cylinder 15, a cold side of the condenser 16 is fed with cooling water, a liquid inlet end of the deaerator 17 is connected to a hot side liquid outlet end of the condenser 16 and a hot side liquid outlet end of the first heat exchanger 3, and a liquid outlet end of the deaerator 17 is connected to a main steam liquid inlet end of the boiler 12 and a liquid inlet end of the pressure reducing valve 2.
It can be understood that steam after doing work in the low-pressure cylinder 15 enters the hot side of the condenser 16, and under the cooling of cooling water in the cold side of the condenser 16, steam after doing work in the low-pressure cylinder 15 condenses into condensed water for recycling, and the condensed water enters the deaerator 17 for deaerating to reduce the oxygen content in the condensed water, thereby reducing the corrosion of the condensed water to each component in the two-stage industrial steam supply system, and effectively prolonging the service life of the two-stage industrial steam supply system.
As shown in fig. 1, in some embodiments, the cogeneration unit 1 further includes a condensate pump 18 and a feed pump 19, the condensate pump 18 is disposed between a liquid inlet end of the deaerator 17 and a liquid outlet end of a hot side of the condenser 16, a liquid inlet end of the condensate pump 18 is connected to the liquid outlet end of the hot side of the condenser 16, a liquid outlet end of the condensate pump 18 is connected to a liquid inlet end of the deaerator 17, the feed pump 19 is disposed between a liquid outlet end of the deaerator 17 and a liquid inlet end of the main steam of the boiler 12 and a liquid inlet end of the pressure reducing valve 2, a liquid inlet end of the feed pump 19 is connected to the liquid outlet end of the deaerator 17, and a liquid outlet end of the feed pump 19 is connected to a liquid inlet end of the main steam of the boiler 12 and a liquid inlet end of the pressure reducing valve 2.
It can be understood that the condensate pump 18 pressurizes and conveys the condensate at the liquid outlet end of the hot side of the condenser 16 to the deaerator 17, and the feed pump 19 pressurizes and conveys the deaerated water at the liquid outlet end of the deaerator 17 to the boiler 12 and the pressure reducing valve 2, so that stable deaerating, recycling and industrial steam supply of the condensate are guaranteed through the arrangement of the condensate pump 18 and the feed pump 19.
As shown in fig. 1, in some embodiments, the cogeneration unit 1 further includes a high-pressure heater 20 and a low-pressure heater 21, a hot side steam inlet end of the high-pressure heater 20 is connected to a steam outlet end of the high-pressure cylinder 13 and a steam outlet end of the intermediate pressure cylinder 14, a hot side steam outlet end of the high-pressure heater 20 is connected to a steam inlet end of the deaerator 17, a cold side of the high-pressure heater 20 is disposed between a steam outlet end of the water feed pump 19 and a main steam inlet end of the boiler 12 and a steam inlet end of the pressure reducing valve 2, a cold side steam inlet end of the high-pressure heater 20 is connected to a liquid outlet end of the water feed pump 19, a cold side liquid outlet end of the high-pressure heater 20 is connected to a main steam inlet end of the boiler 12 and a liquid inlet end of the pressure reducing valve 2, a hot side steam inlet end of the low-pressure heater 21 is connected to a steam outlet end of the intermediate pressure cylinder 14 and a steam outlet end of the low-pressure cylinder 15, a hot side liquid outlet end of the low-pressure heater 21 is connected to a hot side steam inlet end of the condenser 16, a cold side steam inlet end of the low-pressure heater 21 is disposed between a liquid inlet end of the condensed deaerator 18 and a liquid outlet end of the low-pressure condenser 17.
It can be understood that part of the steam of the intermediate pressure cylinder 14 and part of the steam of the low pressure cylinder 15 pass through the hot side of the low pressure heater 21 and then enter the hot side steam inlet end of the condenser 16, so that the condensed water is heated by the steam at the hot side of the low pressure heater 21 when passing through the cold side of the low pressure heater 21, and the heated condensed water enters the deaerator 17; meanwhile, part of the steam of the high pressure cylinder 13 and part of the steam of the intermediate pressure cylinder 14 pass through the hot side of the high pressure heater 20 and then enter the deaerator 17, and thus, when deaerated water passes through the cold side of the high pressure heater 20, the deaerated water is heated to high temperature water by the steam of the hot side of the high pressure heater 20, and the high temperature water enters the boiler 12 and the pressure reducing valve 2. Through the setting of high pressure feed water heater 20 and low pressure feed water heater 21, can effectively reduce the energy loss of boiler 12, improve the heating efficiency of oxygen-removed water.
When steam supply is needed, the first switch valve 10, the second switch valve 11, the pressure reducing valve 2, the temperature and pressure reducing device 5, the first flow regulating valve 6, the second flow regulating valve 7, the third flow regulating valve 8 and the fourth flow regulating valve 9 are opened, meanwhile, based on high-pressure steam demands of different parameters, the pressure of superheated steam can be regulated by controlling the pressure threshold value of the pressure reducing valve 2, the flow of the superheated steam can be regulated by controlling the opening degrees of the first flow regulating valve 6 and the second flow regulating valve 7, the temperature of the superheated steam can be regulated by controlling the opening degrees of the third flow regulating valve 8 and the fourth flow regulating valve 9, and based on low-pressure steam demands of different parameters, the temperature threshold value and the pressure threshold value of the temperature and pressure reducing device 5 can be controlled to regulate the temperature and the pressure of the low-pressure steam.
When steam supply is not required, the first on-off valve 10, the second on-off valve 11, the pressure reducing valve 2, the temperature and pressure reducing device 5, the first flow rate adjusting valve 6, the second flow rate adjusting valve 7, the third flow rate adjusting valve 8, and the fourth flow rate adjusting valve 9 may be closed, so that the cogeneration unit 1 only generates electricity.
It should be noted that, in the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present disclosure, "a plurality" means two or more unless otherwise specified.
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 in the process, and alternate 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 herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.
Claims (10)
1. A pressure reducing regulation two-stage industrial steam supply system based on a steam heat source is characterized by comprising:
a cogeneration unit;
the liquid inlet end of the pressure reducing valve is connected with the liquid inlet end of main boiler steam of the cogeneration unit;
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 liquid outlet end of the pressure reducing valve;
and the hot side steam inlet end of the second heat exchanger is connected with the reheated steam outlet end of the cogeneration unit, the hot side steam outlet end of the second heat exchanger is connected with the steam inlet end of the low-pressure steam consuming equipment, 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 high-pressure steam consuming equipment.
2. The dual stage regulated pressure reducing industrial steam supply system according to claim 1 further comprising:
and the temperature and pressure reducing device is arranged between the steam outlet end of the hot side of the second heat exchanger and the steam inlet end of the low-pressure steam equipment, the steam inlet end of the temperature and pressure reducing device is connected with the steam outlet end of the hot side of the second heat exchanger, and the steam outlet end of the temperature and pressure reducing device is connected with the steam inlet end of the low-pressure steam equipment.
3. The dual stage regulated pressure reducing industrial steam supply system according to claim 2 further comprising:
the liquid inlet end of the first flow regulating valve is connected with the main boiler steam liquid inlet 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 pressure reducing valve.
4. The dual stage regulated pressure reducing industrial steam supply system according to 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 high-pressure steam equipment, 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 high-pressure steam equipment.
5. The dual stage steam supply system with reduced pressure regulation based on a steam heat source of claim 2, 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;
and the fourth flow regulating valve is arranged between the steam outlet end of the temperature and pressure reducing device and the steam inlet end of the low-pressure steam equipment, the steam inlet end of the fourth flow regulating valve is connected with the steam outlet end of the temperature and pressure reducing device, and the steam outlet end of the fourth flow regulating valve is connected with the steam inlet end of the low-pressure steam equipment.
6. The dual stage regulated pressure reducing industrial steam supply system according to claim 5 further comprising:
the first switch valve is arranged between the steam inlet end at the hot side of the first heat exchanger and the connection of the steam outlet end of the main steam of the cogeneration unit, the steam inlet end of the first switch valve is connected with the steam outlet end of the main steam of the cogeneration unit, and the steam outlet end of the first switch valve is connected with the steam inlet end at the hot side of the first heat exchanger;
and the second switch valve is arranged between the hot side steam inlet end of the second heat exchanger and the reheated steam outlet end of the cogeneration unit, the steam inlet end of the second switch valve is connected with the reheated 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. A reduced pressure regulated dual stage 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 intermediate pressure cylinder is connected with the steam outlet end of the reheated 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.
8. The dual-stage industrial steam supply system with pressure reduction and regulation based on a steam heat source as set forth in 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;
and the liquid inlet end of the deaerator is connected with the liquid outlet end of the hot side of the condenser and the liquid outlet end of the hot side of the first heat exchanger, and the liquid outlet end of the deaerator is connected with the liquid inlet end of the main steam of the boiler and the liquid inlet end of the pressure reducing valve.
9. The steam heat source-based reduced pressure regulated dual stage industrial steam supply system of claim 8, wherein the cogeneration unit further comprises:
the condensate pump is arranged between the liquid inlet end of the deaerator and the liquid outlet end at the hot side of the condenser, the liquid inlet end of the condensate pump is connected with the liquid outlet end at the hot side of the condenser, and the liquid outlet end of the condensate pump is connected with the liquid inlet end of the deaerator;
the feed pump, the feed pump sets up the play liquid end of oxygen-eliminating device with the main steam feed liquor end of boiler reaches between the feed liquor end of relief pressure valve links to each other, the feed liquor end of feed pump with the play liquid end of oxygen-eliminating device links to each other, the play liquid end of feed pump with the main steam feed liquor end of boiler reaches the feed liquor end of relief pressure valve links to each other.
10. The steam heat source-based reduced pressure regulated dual stage industrial steam supply system of claim 9, wherein the cogeneration unit further comprises:
the hot side steam inlet end of the high-pressure heater is connected with the steam outlet end of the high-pressure cylinder and the steam outlet end of the medium-pressure cylinder respectively, 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 water feed pump and the connection of the main steam liquid inlet end of the boiler and the liquid inlet end of the pressure reducing valve, the cold side liquid inlet end of the high-pressure heater is connected with the liquid outlet end of the water feed pump, and the cold side liquid outlet end of the high-pressure heater is connected with the main steam liquid inlet end of the boiler and the liquid inlet end of the pressure reducing valve;
the low pressure heater, low pressure heater's hot side steam inlet end respectively with the steam outlet end of intermediate pressure jar reaches the steam outlet end of low pressure jar links to each other, low pressure heater's hot side play liquid end with the hot side steam inlet end of condenser links to each other, low pressure heater's cold side sets up condensate pump's play liquid end with between the feed liquor end of oxygen-eliminating device links to each other, low pressure heater's feed liquor cold side end with condensate pump's play liquid end links to each other, low pressure heater's cold side play liquid end with the feed liquor end of oxygen-eliminating device links to each other.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222373144.4U CN218624356U (en) | 2022-09-06 | 2022-09-06 | Pressure reduction adjustment two-stage industrial steam supply system based on steam heat source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222373144.4U CN218624356U (en) | 2022-09-06 | 2022-09-06 | Pressure reduction adjustment two-stage industrial steam supply system based on steam heat source |
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