CN218117870U - Two-stage industrial steam supply system based on steam heat source - Google Patents
Two-stage industrial steam supply system based on steam heat source Download PDFInfo
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- CN218117870U CN218117870U CN202222392448.5U CN202222392448U CN218117870U CN 218117870 U CN218117870 U CN 218117870U CN 202222392448 U CN202222392448 U CN 202222392448U CN 218117870 U CN218117870 U CN 218117870U
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Abstract
The present disclosure provides a two-stage industrial steam supply system based on a steam heat source, comprising: the hot side steam inlet end of the second heat exchanger is connected with the reheated steam outlet 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 high-pressure steam equipment; 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. In the two-stage industrial steam supply system based on the steam heat source, different steam requirements can be met, the high-pressure steam supply capacity is greatly improved, and the influence of reheating over-temperature, deep peak regulation and other factors is avoided.
Description
Technical Field
The disclosure relates to the technical field of industrial steam supply, in particular to a two-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 atmospheric pollution is easily caused by the fact that a large number of small-scale steam boilers are arranged, the efficiency of the self-built steam boiler of the enterprise is low, and the production cost of the enterprise is increased seriously. Therefore, a large cogeneration unit is 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 dual stage industrial steam supply system based on a steam heat source.
To achieve the above objects, the present disclosure provides a dual-stage industrial steam supply system based on a steam heat source, comprising: a 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 deaerated water liquid outlet end of the cogeneration unit; the hot side steam inlet end of the second heat exchanger is connected with the reheated steam outlet 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 high-pressure steam equipment; and 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: the variable-frequency booster pump is arranged between a cold side liquid inlet end of the first heat exchanger and a deoxygenated water outlet end of the cogeneration unit, a liquid inlet end of the variable-frequency booster pump is connected with the deoxygenated water outlet end of the cogeneration unit, and a liquid outlet end of the variable-frequency booster pump is connected with a cold side liquid inlet end of the first heat exchanger.
Optionally, the dual-stage industrial steam supply system further includes: the liquid inlet end of the first flow regulating valve is connected with the deoxygenated water 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 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 reheating 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 cold side 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 liquid outlet end of the hot side of the condenser, the liquid inlet end of the condensate pump is connected with the liquid outlet end of 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 deaerating water pump is arranged between the liquid outlet end of the deaerator and the main steam liquid inlet end of the boiler, the liquid inlet end of the deaerating water pump is connected with the liquid outlet end of the deaerator, and the liquid outlet end of the deaerating 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 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 deaerating water pump and the main steam liquid inlet end of the boiler, the liquid inlet cold side end of the high-pressure heater is connected with the liquid outlet end of the deaerating 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; low pressure feed water heater, low pressure feed water heater's hot side steam inlet end respectively with the play steam end of intermediate pressure jar reaches the play steam end of low pressure jar links to each other, low pressure feed water heater's hot side steam outlet end with condensate pump's feed liquor end 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 cold side feed liquor 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 passes through the temperature and pressure reduction device for reducing the temperature and the pressure after heating the saturated steam, so that low-temperature low-pressure steam is supplied to low-pressure steam equipment for use, thereby realizing double-stage concentrated steam supply and meeting different steam requirements.
The high-pressure steam supply capacity of the two-stage industrial steam supply system is greatly improved by taking the deoxygenated water of the cogeneration unit as a water source and taking the main steam and the reheated steam of the cogeneration unit as heat sources, so that the two-stage industrial steam supply system can still stably supply the high-pressure steam when the main steam quantity of the cogeneration unit is reduced, and the influence of factors such as reheating overtemperature, deep peak regulation and the like is avoided; the double-stage industrial steam supply system is only provided with the first heat exchanger, the second heat exchanger and the temperature and pressure reducing device on the cogeneration unit, has 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 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 of which:
FIG. 1 is a schematic structural diagram of a 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 heat and power cogeneration unit 2, a first heat exchanger 3, a second heat exchanger 4, a temperature and pressure reducing device 5, a variable-frequency booster pump 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 deaerating water 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. On the contrary, the embodiments of the disclosure include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
As shown in fig. 1, the embodiment of the present disclosure provides a two-stage industrial steam supply system based on a steam heat source, including a cogeneration unit 1, a first heat exchanger 2, a second heat exchanger 3, and a temperature and pressure reducing device 4, where a hot-side steam inlet end of the first heat exchanger 2 is connected to a main steam outlet end of the cogeneration unit 1, a hot-side water outlet end of the first heat exchanger 2 is connected to a condensed water outlet end of the cogeneration unit 1, a cold-side liquid inlet end of the first heat exchanger 2 is connected to a deoxygenated water outlet end of the cogeneration unit 1, a hot-side steam inlet end of the second heat exchanger 3 is connected to a reheated steam outlet end of the cogeneration unit 1, a cold-side steam inlet end of the second heat exchanger 3 is connected to a cold-side steam outlet end of the first heat exchanger 2, a cold-side steam outlet end of the second heat exchanger 3 is connected to a steam inlet end of a high-pressure steam-using device, a steam inlet end of the temperature and pressure reducing device 4 is connected to a hot-side steam outlet end of the low-pressure 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 reheated steam of the cogeneration unit 1 passes through the hot side of the second heat exchanger 3, so that part of the deoxygenated water of the cogeneration unit 1 is heated into saturated steam by the main steam at the hot side of the first heat exchanger 2 when passing through the cold side of the first heat exchanger 2, the saturated steam is heated into superheated steam by the reheated steam at the hot side of the second heat exchanger 3 when passing through the cold side of the second heat exchanger 3, the superheated steam is supplied to the high-pressure steam equipment, and the reheated steam at the hot side of the second heat exchanger 3 passes through the temperature reduction and pressure reduction device 4 after the saturated steam is heated, so as to form low-temperature low-pressure steam to be supplied to the low-pressure steam equipment, thereby realizing two-stage concentrated steam supply and meeting different steam consumption requirements.
The high-pressure steam supply capacity of the two-stage industrial steam supply system is greatly improved by taking the deaerated water of the cogeneration unit 1 as a water source and taking the main steam and the reheated steam of the cogeneration unit 1 as heat sources, the two-stage industrial steam supply system is guaranteed to be still capable of stably supplying 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.
The double-stage industrial steam supply system is only provided with the first heat exchanger 2, the second heat exchanger 3 and the temperature and pressure reduction device 4 on the combined heat and power generation unit 1, is simple in structure, convenient to install and low in modification cost, and guarantees safe operation of the combined heat and power generation unit 1 while improving steam supply capacity.
It should be noted that the first heat exchanger 2 and the second heat exchanger 3 both include a hot side and a cold side for heat exchange, and the hot side and the cold side can directly exchange heat therebetween, or can indirectly exchange heat via a heat exchange medium or the like.
The temperature and pressure reducing device 4 is used for temperature regulation and pressure regulation of steam at the steam outlet end at the hot side of the second heat exchanger 3, and the temperature and pressure reducing device 4 can be a temperature and pressure reducing valve or other temperature and pressure reducing equipment. The temperature and pressure reducing device 4 can reduce the temperature by cooling water, cooling oil, or the like.
The temperature and pressure reducing device 4 may be controlled manually or electrically.
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 two-stage industrial steam supply system further includes a variable frequency booster pump 5, the variable frequency booster pump 5 is disposed between the cold-side liquid inlet end of the first heat exchanger 2 and the deoxygenated water outlet end of the cogeneration unit 1, the liquid inlet end of the variable frequency booster pump 5 is connected to the deoxygenated water outlet end of the cogeneration unit 1, and the liquid outlet end of the variable frequency booster pump 5 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 5 boosts and conveys part of 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 to ensure that the deoxygenated water is sequentially heated into saturated steam and superheated steam, so as to meet the requirement of high-pressure steam utilization; moreover, the pressure of the superheated steam is adjusted by controlling the frequency of the variable-frequency booster pump 5, so that the steam demand of different high pressures is met.
It should be noted that, under the transportation of the variable frequency booster pump 5, the superheated steam pressure passing through the cold side of the first heat exchanger 2 and the cold side of the second heat exchanger 3 can reach above 4MPa, and the steam demand of the industries such as chemical industry and petroleum can be met.
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 a liquid inlet end of the variable-frequency booster pump 5 and a liquid outlet end of the deaerated water of the cogeneration unit 1, the liquid inlet end of the first flow regulating valve 6 is connected to the liquid outlet end of the deaerated water of the cogeneration unit 1, and the liquid outlet end of the first flow regulating valve 6 is connected to the liquid inlet end of the variable-frequency booster pump 5.
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 control valve 6, so that the flow control of the superheated steam is realized by controlling the opening degree of the first flow control 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 electric regulating valve, and a flow meter may be further disposed on a pipeline between a liquid inlet end of the variable frequency booster pump 5 and a deoxygenated water outlet end of the cogeneration unit 1, so as to cooperate with the first flow regulating valve 6 to achieve 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 3 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 3, 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 3 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 electric regulating valve, and a flow meter may also be disposed on a pipeline between the cold-side steam outlet of the second heat exchanger 3 and the steam inlet of the high-pressure steam consuming device, 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 2 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 2, 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 4 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 4, 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 2 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 regulation of main steam at the hot side of the first heat exchanger 2 is realized 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 4 enters the steam inlet end of the low-pressure steam equipment after passing through the fourth flow control valve 9, so that the flow regulation of the reheated steam at the hot side of the second heat exchanger 3 is realized 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 electric 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 2 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 electric regulating valve, and a flow meter may be provided on a pipeline between the steam outlet of the temperature and pressure reducing device 4 and the steam inlet of the low-pressure steam consuming apparatus 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 2 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 2, the second switch valve 11 is disposed between the steam inlet end of the hot side of the second heat exchanger 3 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 3.
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 2 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 3 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 temperature and pressure reduction device 4, 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 temperature and pressure reduction device 4, the variable-frequency booster pump 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 controller is arranged, so that the overall automatic control of the double-stage industrial steam supply system is facilitated, 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 2, a reheat steam outlet of the boiler 12 is connected to a hot side steam inlet of the second heat exchanger 3, 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 the water into the main steam, a part of the main steam enters the hot side of the first heat exchanger 2, the other part of the main steam enters the high pressure cylinder 13 to do work and generate power, the steam which does work in the high pressure cylinder 13 enters the boiler 12 again to be reheated, so as to form reheated steam, a part of the reheated steam enters the hot side of the second heat exchanger 3, the other part of the reheated steam enters the intermediate pressure cylinder 14 to do work and generate power, and the steam which does 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 reheat steam, and satisfies the power demand.
It should be noted that when the two-stage industrial steam supply system performs high-pressure steam supply and does not need low-pressure steam supply, the steam at the steam outlet end of the hot side of the second heat exchanger 3 may be directly delivered to the low-pressure cylinder 15 to do work and generate power without passing through the temperature and pressure reducing device 4.
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 2, and a liquid outlet end of the deaerator 17 is connected to a main steam liquid inlet end of the boiler 12 and a cold side liquid inlet end of the first heat exchanger 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 an oxygen removal water pump 19, the condensate pump 18 is disposed between the liquid inlet end of the oxygen remover 17 and the liquid outlet end of the hot side of the condenser 16, the liquid inlet end of the condensate pump 18 is connected to the liquid outlet end of the hot side of the condenser 16, the liquid outlet end of the condensate pump 18 is connected to the liquid inlet end of the oxygen remover 17, the oxygen removal water pump 19 is disposed between the liquid outlet end of the oxygen remover 17 and the liquid inlet end of the main steam of the boiler 12, the liquid inlet end of the oxygen removal water pump 19 is connected to the liquid outlet end of the oxygen remover 17, and the liquid outlet end of the oxygen removal water pump 19 is connected to the liquid inlet end of the main steam of the boiler 12.
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 deaerator pump 19 pressurizes and conveys the deaerated water at the liquid outlet end of the deaerator 17 to the boiler 12, so that the condensate pump 18 and the deaerator pump 19 are arranged to ensure stable deaerating and recycling of the condensate.
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 deaerating water pump 19 and a main steam inlet end of the boiler 12, a cold side steam inlet end of the high-pressure heater 20 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 steam outlet end of the low-pressure heater 21 is connected to a steam inlet end of the condensing water pump 18, a cold side of the low-pressure heater 21 is disposed between a steam outlet end of the condensing water pump 18 and a steam inlet end of the deaerator 17, a cold side of the low-pressure heater 21 is connected to a cold side steam outlet end of the condensing water pump 18, and a cold side of the deaerator 17.
It can be understood that part of the steam at the steam outlet end of the intermediate pressure cylinder 14 and part of the steam at the steam outlet end of the low pressure cylinder 15 pass through the hot side of the low pressure heater 21 and then enter the liquid inlet end of the condensate pump 18, so that the condensate 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 condensate enters the deaerator 17; meanwhile, part of the steam at the steam outlet end of the high pressure cylinder 13 and part of the steam at the steam outlet end of the intermediate pressure cylinder 14 pass through the hot side of the high pressure heater 20 and then enter the deaerator 17, so that part of deaerated water is heated by the steam at the hot side of the high pressure heater 20 when passing through the cold side of the high pressure heater 20, and the heated deaerated water enters the boiler 12. 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 required, the first switch valve 10, the second switch valve 11, the temperature and pressure reducing device 4, the variable-frequency booster pump 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, the pressure of the superheated steam can be regulated by controlling the frequency of the variable-frequency booster pump 5, 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 based on different high-pressure steam demands, and the temperature and pressure of the low-pressure steam can be regulated by controlling the temperature threshold value and the pressure threshold value of the temperature and pressure reducing device 4 based on different low-pressure steam demands.
When steam supply is not needed, the first switch valve 10, the second switch valve 11, the temperature and pressure reducing device 4, the variable-frequency booster pump 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 all 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 of the process, and the scope of the preferred embodiments of the present disclosure includes other implementations 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.
Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not 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 two-stage industrial steam supply system based on a steam heat source, comprising:
a 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 deoxygenated water liquid outlet end of the cogeneration unit;
the hot side steam inlet end of the second heat exchanger is connected with the reheated steam outlet 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 high-pressure steam equipment;
and 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.
2. A dual stage industrial steam supply system based on a steam heat source as described in claim 1 further comprising:
the variable frequency booster pump sets up the cold side inlet end of first heat exchanger with the deoxidization water of cogeneration unit goes out between the liquid end links to each other, the inlet end of variable frequency booster pump with the deoxidization water of cogeneration unit goes out the liquid end and links to each other, the play liquid end of variable frequency booster pump with the cold side inlet end of first heat exchanger links to each other.
3. The dual stage steam heat source-based industrial steam supply system of claim 2, further comprising:
the liquid inlet end of the first flow regulating valve is connected with the deoxygenated water 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. A dual stage industrial steam supply system based on a steam heat source as described in 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. A dual stage steam heat source-based industrial steam supply system as recited in claim 1 further comprising:
the third flow regulating valve is arranged between a liquid outlet end at the hot side of the first heat exchanger and a condensed water outlet end of the cogeneration unit, a liquid inlet end of the third flow regulating valve is connected with a liquid outlet end at the hot side of the first heat exchanger, and a liquid outlet end of the third flow regulating valve is connected with a condensed water 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. A dual stage industrial steam supply system based on a steam heat source as described in 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. The dual stage steam supply system based on a steam heat source as recited in 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 steam supply system based on a steam heat source as recited 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 cold side of the first heat exchanger.
9. The dual stage steam heat source-based 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 deoxidization water pump, the deoxidization water pump sets up the play liquid end of oxygen-eliminating device with the main steam feed liquor end of boiler links to each other between, the feed liquor end of deoxidization water pump with the play liquid end of oxygen-eliminating device links to each other, the play liquid end of deoxidization water pump with the main steam feed liquor end of boiler links to each other.
10. The dual stage steam supply system based on a steam heat source as recited in 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 deaerating water pump and the main steam liquid inlet end of the boiler, the liquid inlet cold side end of the high-pressure heater is connected with the liquid outlet end of the deaerating 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;
low pressure feed water heater, low pressure feed water heater's hot side steam inlet end respectively with the play steam end of intermediate pressure jar reaches the play steam end of low pressure jar links to each other, low pressure feed water heater's hot side steam outlet end with condensate pump's feed liquor end 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 cold side feed liquor 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.
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| CN202222392448.5U CN218117870U (en) | 2022-09-06 | 2022-09-06 | 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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| CN202222392448.5U CN218117870U (en) | 2022-09-06 | 2022-09-06 | Two-stage industrial steam supply system based on steam heat source |
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