CN218672137U - Back pressure machine heating system - Google Patents
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- CN218672137U CN218672137U CN202222989135.8U CN202222989135U CN218672137U CN 218672137 U CN218672137 U CN 218672137U CN 202222989135 U CN202222989135 U CN 202222989135U CN 218672137 U CN218672137 U CN 218672137U
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Abstract
The present disclosure relates to a heating system of a backpressure machine, which comprises a backpressure machine, a cooler and a temperature reduction device, wherein a steam inlet of the backpressure machine is communicated with a steam supply device; the cooler is provided with a first channel for steam to flow through and a second channel for low-temperature medium to flow through, so that the steam and the low-temperature medium exchange heat through the cooler, an inlet of the first channel is communicated with a steam exhaust port of the back pressure machine through a first steam supply pipeline, an outlet of the first channel is communicated with an external heat supply system through a first steam exhaust pipeline, and an inlet and an outlet of the second channel are both communicated with the low-temperature medium supply system; the temperature reduction device is connected to the first steam supply pipeline in a bypassing mode, so that steam flowing through the temperature reduction device can be cooled, and the cooled steam is guided to the external heating system, the problem that the external heating system wastes certain due to high steam temperature can be avoided, the heat utilization requirement of industrial users can be met while the safe and stable operation of the back pressure machine heating system is guaranteed.
Description
Technical Field
The disclosure relates to the technical field of back pressure machine heat supply, in particular to a back pressure machine heat supply system.
Background
With the maturity and development of steam turbine heat supply transformation technology, more and more domestic power plants transform the generating set to enlarge the heat supply area of the generating set, improve heat economy. In order to ensure the heat demand of industrial users, various domestic power plants generally convey a high-quality extraction steam source into a backpressure machine and drive the backpressure machine to do work, and can convey exhaust steam after the backpressure machine does work to the industrial users to supply heat to the industrial users while realizing power generation.
In the related art, as the quality of steam is continuously improved, the exhaust steam temperature of the back press is also increased, the exhaust steam temperature of the back press is often far higher than the heat demand of industrial users, superheated steam is directly conveyed to the industrial users, great impact is caused to the heating system of the industrial users, and meanwhile the heat economy of a unit cannot be exerted to the maximum.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a backpressure machine heating system, this backpressure machine heating system can solve outside heating system in the correlation technique because the higher problem that causes certain waste of steam temperature, when having guaranteed backpressure machine heating system safety and stability operation, can also satisfy industrial user's heat demand.
In order to achieve the above object, the present disclosure provides a heating system for a back pressure machine, including: the steam inlet of the back press is communicated with a steam supply device; the cooler is provided with a first channel for steam to flow through and a second channel for low-temperature medium to flow through so that the steam and the low-temperature medium exchange heat through the cooler, an inlet of the first channel is communicated with a steam exhaust port of the back press through a first steam supply pipeline, an outlet of the first channel is communicated with an external heat supply system through a first steam exhaust pipeline, and an inlet and an outlet of the second channel are both communicated with the low-temperature medium supply system; and the temperature reducing device is connected to the first steam supply pipeline in a bypassing manner, so that the steam flowing through the temperature reducing device can be cooled and the cooled steam is guided to the external heat supply system.
Optionally, the cooler includes an outer cylinder and an inner cylinder located inside the outer cylinder, the outer cylinder and the inner cylinder are arranged coaxially to form the first channel between an inner wall of the outer cylinder and an outer wall of the inner cylinder, and the second channel is formed inside the inner cylinder.
Optionally, the flow direction of the steam in the first channel is opposite to the flow direction of the cryogenic medium in the second channel.
Optionally, the cryogenic medium supply system comprises a cryogenic medium conveying flow path, and a first stop valve, a heater and a second stop valve which are sequentially communicated in series along the flow direction of the cryogenic medium in the cryogenic medium conveying flow path, wherein an inlet of the second channel is communicated with the cryogenic medium conveying flow path through a first flow path, a connection position of the first flow path and the cryogenic medium conveying flow path is located at the upstream of the first stop valve, an outlet of the second channel is communicated with the cryogenic medium conveying flow path through a second flow path, and a connection position of the second flow path and the cryogenic medium conveying flow path is located at the downstream of the second stop valve; and a third stop valve is arranged on the first flow path, and a fourth stop valve is arranged on the second flow path.
Optionally, a first regulating valve, a fifth stop valve and a first flow meter are further sequentially communicated in series on the first flow path along the flow direction of the low-temperature medium, and the first regulating valve is located downstream of the third stop valve; the low-temperature medium conveying flow path is also provided with a first check valve, and the first check valve is positioned at the upstream of the connection position of the low-temperature medium conveying flow path and the first flow path.
Optionally, an auxiliary flow path is further communicated with the low-temperature medium conveying flow path, a connection point of a water inlet of the auxiliary flow path and the low-temperature medium conveying flow path is located upstream of the third stop valve, a connection point of a water outlet of the auxiliary flow path and the low-temperature medium conveying flow path is located downstream of the fifth stop valve, and a sixth stop valve is disposed on the auxiliary flow path.
Optionally, the temperature reducing device comprises a temperature reducer, a steam inlet of the temperature reducer is communicated with the first steam supply pipeline through a second steam supply pipeline, a steam outlet of the temperature reducer is communicated with the first steam exhaust pipeline through a second steam exhaust pipeline, and a water inlet of the temperature reducer is communicated with the cooling water supply device through a first water supply pipeline; the first steam supply pipeline is provided with a first isolation valve, the first isolation valve is positioned at the downstream of the joint of the first steam supply pipeline and the second steam supply pipeline, and the second steam supply pipeline is provided with a second isolation valve.
Optionally, a third isolation valve is further disposed on the first steam exhaust pipeline, and the third isolation valve is located at one end where the outlet of the first channel is located and at an upstream of a connection between the first steam exhaust pipeline and the second steam exhaust pipeline.
Optionally, an eighth stop valve, a throttle valve, a second regulating valve, a seventh stop valve, a second flow meter and a second check valve are sequentially communicated in series with the first water supply pipeline along the flow direction of the cooling water; and the first water supply pipeline is also communicated with a second water supply pipeline, the joint of the water inlet of the second water supply pipeline and the first water supply pipeline is positioned at the upstream of the eighth stop valve, the joint of the water outlet of the second water supply pipeline and the first water supply pipeline is positioned at the downstream of the seventh stop valve, and the second water supply pipeline is provided with a ninth stop valve.
Optionally, a third check valve is further disposed on the first steam supply pipeline, and the third check valve is located at an end close to the steam outlet of the back-pressing machine and upstream of a connection between the first steam supply pipeline and the temperature reduction device.
Through the technical scheme, this backpressure machine heating system that this disclosure provided promptly, this heating system communicates the steam vent of backpressure machine in the import of the first passageway of cooler through first steam supply pipeline, and the second passageway and the low temperature medium feed system intercommunication of this cooler, thus, can make the low temperature medium in the low temperature medium feed system flow into in the cooler and carry out the heat exchange with the high-temperature steam of flowing through this cooler, thereby can realize the cooling to high-temperature steam, and carry the steam after with cooling to outside heating system via first steam discharge pipeline, and then can avoid outside heating system to appear because the higher problem that causes certain waste of steam temperature, whole heating system safety and stability's operation has been guaranteed. Meanwhile, the heat in the superheated steam can be effectively absorbed through a low-temperature medium such as condensed water or boiler feed water, so that the heated condensed water or boiler feed water can be used for subsequent thermodynamic cycle, the energy loss is reduced, and the system heat economy is high. In addition, first steam supply pipeline still other side has connect the heat sink, and this heat sink can cool down the steam of flow through the heat sink and guide the steam after the cooling to outside heating system in, makes like this when the problem that for example the trouble can not normally work appears in the cooler, can also regard as reserve steam transmission route through one side at this heat sink place, has guaranteed when the cooler overhauls the maintenance operation, and heating system still can stable operation, and the suitability is high.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a schematic structural diagram of a heating system of a back pressure machine provided in an exemplary embodiment of the present disclosure.
Description of the reference numerals
1-back press; 110-steam inlet; 120-steam exhaust port; 2-a cooler; 210-a first channel; 220-a second channel; 230-an outer barrel; 240-inner cylinder; 3-a first steam supply pipeline; 310-a first isolation valve; 320-a third non-return valve; 4-a first exhaust line; 410-a third isolation valve; 5-an external heating system; 6-cryogenic medium supply system; 610-cryogenic medium transport flow path; 611 — a first stop valve; 612-a heater; 613-second stop valve; 614-first non-return valve; 620 — a first flow path; 621-a third stop valve; 622 — first regulating valve; 623-a fifth stop valve; 624-first flow meter; 630-a second flow path; 631-a fourth stop valve; 640-an auxiliary flow path; 641-a sixth stop valve; 7-a temperature reducing device; 710-a desuperheater; 720-second steam supply pipeline; 721-a second isolation valve; 730-a second exhaust line; 740-a first water supply line; 741-a throttle valve; 742-a second regulating valve; 743-a seventh stop valve; 744-a second flow meter; 745-a second non-return valve; 746-eighth stop valve; 750-cooling water supply means; 760-a second water supply line; 761-a ninth stop valve; 8-steam supply device.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise specified, "inner and outer" refer to inner and outer relative to the contour of the component or structure itself. In addition, it should be noted that terms such as "first", "second", and the like are used for distinguishing one element from another, and have no order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.
According to the heat supply system of the back pressure machine provided by the present disclosure, referring to fig. 1, the heat supply system includes a back pressure machine 1, a cooler 2 and a temperature reduction device 7, wherein a steam inlet 110 of the back pressure machine 1 is communicated with a steam supply device 8; the cooler 2 is provided with a first channel 210 for steam to flow through and a second channel 220 for low-temperature medium to flow through, so that the steam and the low-temperature medium exchange heat through the cooler 2, the inlet of the first channel 210 is communicated with the steam outlet 120 of the back-pressing machine 1 through a first steam supply pipeline 3, the outlet of the first channel 210 is communicated with an external heat supply system 5 through a first steam exhaust pipeline 4, and the inlet and the outlet of the second channel 220 are both communicated with a low-temperature medium supply system 6; the temperature reducing device 7 is connected to the first steam supply pipeline 3, so that the steam flowing through the temperature reducing device 7 can be cooled and the cooled steam is guided to the external heating system 5.
Through the technical scheme, this heating system is the backpressure machine heating system that this disclosure provided, this heating system communicates the steam vent 120 of backpressure machine 1 in the import of the first passageway 210 of cooler 2 through first steam supply pipeline 3, and the second passageway 220 and the low temperature medium feed system 6 intercommunication of this cooler 2, thus, can make the low temperature medium in the low temperature medium feed system 6 flow into in the cooler 2 and carry out the heat exchange with the high temperature steam that flows through this cooler 2, thereby can realize the cooling to high temperature steam, and carry the steam after cooling to outside heating system 5 via first steam discharge pipeline 4, and then can avoid outside heating system 5 to appear because the higher problem that causes certain waste of steam temperature, whole heating system safety and stability's operation has been guaranteed. Meanwhile, the heat in the superheated steam can be effectively absorbed through a low-temperature medium such as condensed water or boiler feed water, so that the heated condensed water or boiler feed water can be used for subsequent thermodynamic cycle, the energy loss is reduced, and the system heat economy is high. In addition, first steam supply pipeline 3 still by-pass has connect attemperator 7, and this attemperator 7 can cool down the steam that flows through attemperator 7 and lead the steam after the cooling to in the external heating system 5, makes like this when cooler 2 appears the problem that for example the trouble can not normally work, can also regard as reserve steam transmission route through one side that this attemperator 7 belonged to, has guaranteed when cooler 2 overhauls the maintenance operation, and heating system still can stable operation, and the suitability is high.
It should be noted that the steam supply device 8 may be, for example, a steam storage device, and the steam source of the steam storage device may be, for example, extraction steam such as main steam extraction, hot re-extraction, and communicating pipe extraction, and the disclosure is not limited thereto.
The cooler 2 may be configured in any suitable manner according to the actual application requirement, for example, in some embodiments, as shown in fig. 1, the cooler 2 may include an outer cylinder 230 and an inner cylinder 240 located inside the outer cylinder 230, the outer cylinder 230 and the inner cylinder 240 are coaxially arranged to form a first passage 210 between an inner wall of the outer cylinder 230 and an outer wall of the inner cylinder 240, and a second passage 220 is formed inside the inner cylinder 240, so that steam flowing through the first passage 210 and a low-temperature medium flowing through the second passage 220 can be efficiently heat-exchanged, the overall structure is simple, and the manufacturing cost is low.
In addition, in some embodiments, referring to fig. 1, the flow direction of the steam in the first channel 210 may be opposite to the flow direction of the low-temperature medium in the second channel 220, i.e., arranged in a counter-flow manner, so as to improve the cooling efficiency of the cooler 2. In addition, fig. 1 exemplarily shows a flow direction of the steam, a flow direction of the low-temperature medium, and a flow direction of the cooling water, where thick arrows indicate the flow direction of the steam, and thin arrows indicate the flow directions of the low-temperature medium and the cooling water.
In some embodiments, referring to fig. 1, the low temperature medium supply system 6 may include a low temperature medium delivery flow path 610 and a first stop valve 611, a heater 612 and a second stop valve 613 which are sequentially communicated in series in a flow direction of the low temperature medium in the low temperature medium delivery flow path 610, an inlet of the second passage 220 is communicated with the low temperature medium delivery flow path 610 through the first flow path 620, a connection of the first flow path 620 with the low temperature medium delivery flow path 610 is located upstream of the first stop valve 611, an outlet of the second passage 220 is communicated with the low temperature medium delivery flow path 610 through the second flow path 630, and a connection of the second flow path 630 with the low temperature medium delivery flow path 610 is located downstream of the second stop valve 613, the first flow path 620 is provided with a third stop valve 621, and the second flow path 630 is provided with a fourth stop valve 631, so that when the cooler 2 is in normal operation, the low temperature medium can be delivered into the cooler 2 through the first flow path 620 and cooled by the high temperature steam flowing through the cooler 2, and the low temperature medium can be condensed to be discharged as a low temperature coolant circulation water for example, and the low temperature coolant is discharged as a subsequent low temperature coolant circulation water.
In addition, when the cooler 2 has a problem that it cannot normally operate, such as a failure, for example, in order to ensure the normal operation of the low-temperature medium side, at this time, the operator may operate to adjust the third stop valve 621 and the fourth stop valve 631 to a closed state and open the first stop valve 611 and the second stop valve 613 accordingly, so that the low-temperature medium can be delivered into the heater 612 through the low-temperature medium delivery passage 610, and the heated low-temperature medium can be discharged, thereby ensuring that the low-temperature medium supply system 6 can still stably operate, and having high applicability and good stability. The specific structure of the heater 612 may be designed according to the actual application requirement, and the purpose is to heat the low-temperature medium flowing through the low-temperature medium conveying flow path 610, and a person skilled in the art may select any known heater according to the actual situation, and the disclosure is not limited in detail herein.
In some embodiments, referring to fig. 1, a first regulating valve 622, a fifth stop valve 623 and a first flow meter 624 may further be sequentially connected in series on the first flow path 620 in the flow direction of the low-temperature medium, and the first regulating valve 622 is located downstream of the third stop valve 621, so that the valve body opening of the first regulating valve 622 can be operatively adjusted according to actual needs, the flow rate of the low-temperature medium flowing through the cooler 2 is controlled, and the cooler 2 is guaranteed to have high cooling efficiency all the time. The first flow meter 624 is arranged, so that an operator can conveniently monitor the flow of the low-temperature medium in the first flow path 620, and the opening degree of the valve body of the first regulating valve 622 can be adaptively adjusted according to the monitored flow value, so that the good cooling effect of the cooler 2 can be ensured.
In addition, as shown in fig. 1, a first check valve 614 may be further disposed on the low temperature medium delivery flow path 610, and the first check valve 614 is located upstream of a connection point of the low temperature medium delivery flow path 610 and the first flow path 620, so as to prevent the low temperature medium from flowing back and ensure stable operation of the low temperature medium supply system.
Furthermore, in some embodiments, referring to fig. 1, an auxiliary flow path 640 may be further communicated with the low-temperature medium delivery flow path 610, a connection between the water inlet of the auxiliary flow path 640 and the low-temperature medium delivery flow path 610 is located upstream of the third stop valve 621, a connection between the water outlet of the auxiliary flow path 640 and the low-temperature medium delivery flow path 610 is located downstream of the fifth stop valve 623, and a sixth stop valve 641 is provided in the auxiliary flow path 640, so that when, for example, trouble shooting occurs in the first regulating valve 622, temporary supply of the low-temperature medium through the auxiliary flow path 640 can be achieved by closing the third stop valve 621 and the fifth stop valve 623 and opening the sixth stop valve 641, thereby gaining time for the work of the trouble shooting and ensuring stable operation of the cooler 2. It should be noted that fig. 1 also exemplarily shows that the number of the sixth stop valves 641 on the auxiliary flow path 640 is two, and the purpose is to ensure that the auxiliary flow path 640 can be better ensured to be sealed by the two sixth stop valves 641 to prevent the leakage problem when the auxiliary flow path 640 is in the closed state.
In some embodiments, referring to fig. 1, the temperature reducing device 7 may include a temperature reducer 710, a steam inlet of the temperature reducer 710 may be communicated with the first steam supply pipeline 3 through a second steam supply pipeline 720, a steam outlet of the temperature reducer 710 may be communicated with the first steam discharge pipeline 4 through a second steam discharge pipeline 730, and a first isolation valve 310 may be disposed on the first steam supply pipeline 3, and the first isolation valve 310 is located downstream of a connection of the first steam supply pipeline 3 and the second steam supply pipeline 720, and a second isolation valve 721 is disposed on the second steam supply pipeline 720, so that when a problem that the cooler 2 cannot normally operate, such as a fault, occurs, it is possible to open the second isolation valve 310 by closing the first isolation valve 310, so as to achieve guiding of high-temperature steam into the temperature reducer 710 through the second steam supply pipeline 720, and a water inlet of the temperature reducer 710 is communicated with the cooling water supply device 750 through the first water supply pipeline 740, so as to continuously provide stable cooling water for the temperature reducer 750, so as to enable cooling water to be supplied to the cooling system 710, and to reduce the temperature of the cooling water, thereby facilitating maintenance of the cooling system and maintenance of the cooling system by directly supplying water for cooling system, and facilitating the cooling water supply of the cooling system 730.
It should be noted that the cooling water supply device 750 may be, for example, a water storage device, and the water outlet of the desuperheater 710 may also be communicated with a water storage tank (not shown in the figure) so as to discharge the cooling water after heat exchange, thereby ensuring high cooling efficiency of the desuperheater 710. In addition, the cooling water may be desuperheated water, or may be other cooling medium such as industrial water or others, and the disclosure is not limited thereto.
Further, in some embodiments, referring to fig. 1, a third isolation valve 410 may be further disposed on the first steam exhaust pipeline 4, and the third isolation valve 410 is located at an end close to the outlet of the first channel 210 and upstream of the connection between the first steam exhaust pipeline 4 and the second steam exhaust pipeline 730, so that when an operator performs maintenance operation on the cooler 2, the third isolation valve 410 and the first isolation valve 310 are both in a closed state at the same time, the problem of steam leakage can be effectively avoided, the safety of the operator can be guaranteed, and it can be guaranteed that when steam is delivered to the external heating system 5 through the second steam supply pipeline 720, the steam is prevented from flowing back into the cooler 2.
In some embodiments, as shown in fig. 1, an eighth cut-off valve 746, a throttle valve 741, a second regulating valve 742, a seventh cut-off valve 743, a second flow meter 744, and a second non-return valve 745 may be sequentially connected in series to the first water supply line 740 in a flow direction of the cooling water, so that it is possible to adaptively regulate the flow rate of the cooling water in the first water supply line 740 according to actual needs through the throttle valve 741 and the second regulating valve 742, and to prevent the cooling water from flowing back through the second non-return valve 745. In addition, the second flow meter 744 facilitates the monitoring of the flow rate of the cooling water in the first water supply line 740 by an operator, so that the opening degrees of the valve bodies of the throttle valve 741 and the second regulating valve 742 can be adaptively adjusted according to actual needs.
In addition, in consideration of convenience in the case of trouble-shooting, for example, of the throttle valve 741 and the second regulating valve 742, the first water supply line 740 may be further communicated with a second water supply line 760, a connection between a water inlet of the second water supply line 760 and the first water supply line 740 is located upstream of the eighth cut-off valve 746, a connection between a water outlet of the second water supply line 760 and the first water supply line 740 is located downstream of the seventh cut-off valve 743, and the second water supply line 760 is provided with a ninth cut-off valve 761, so that by closing the eighth cut-off valve 746 and the seventh cut-off valve 743 and simultaneously opening the ninth cut-off valve 761, supply of cold water and hot water can be temporarily performed through the second water supply line 760, thereby providing time for the maintenance work and ensuring a stable operation of the heating system. It should be noted that fig. 1 also exemplarily shows that the number of the ninth stop valves 761 on the second water supply line 760 is two, which is to ensure that the second water supply line 760 can be better ensured to be sealed by the two ninth stop valves 761 when the second water supply line 760 is in the closed state, so as to prevent the leakage of the cooling water.
In some embodiments, referring to fig. 1, a third check valve 320 may be further disposed on the first steam supply pipeline 3, and the third check valve 320 is located near an end where the steam outlet 120 of the back press 1 is located and upstream of a connection between the first steam supply pipeline 3 and the temperature reduction device 7, so as to prevent steam discharged from the steam outlet 120 of the back press 1 from flowing back, which is beneficial to ensure stable operation of the heating system. It should be noted that, the isolation valve, the throttle valve, the stop valve and the regulating valve may be controlled manually or automatically by an upper computer, for example, to open and close the valve body accordingly, which is not limited in this disclosure.
Based on the above embodiments, the present disclosure exemplarily describes the working process of the heating system of the back pressure machine, which is as follows: it should be noted that at this time, the isolation valve and the stop valve on the pipeline are both in a closed state, and the throttle valve and the regulating valve are both adjusted to a preset working position correspondingly;
when the cooler 2 is operating normally, at this time, the first isolation valve 310, the third isolation valve 410, the third stop valve 621, the fifth stop valve 623, and the fourth stop valve 631 are opened, so that the steam in the steam supply device 8-the backpressure machine 1-the first steam supply pipeline 3-the first passage 210-the first exhaust pipeline 4-the external heat supply system 5 of the cooler 2; meanwhile, the low-temperature medium-low-temperature medium conveying flow path 610-the first flow path 620-the second channel 220-the second flow path 630-the low-temperature medium conveying flow path 610 of the cooler 2 in the low-temperature medium supply system 6 are used for subsequent thermodynamic cycle, in the process, heat exchange can be realized between high-temperature steam and the low-temperature medium, so that cooling of the high-temperature steam can be realized, the cooled steam is conveyed to the external heating system 5 through the first exhaust pipeline 4, the problem that certain waste is caused due to high steam temperature of the external heating system 5 can be avoided, and safe and stable operation of the whole heating system is guaranteed.
When the cooler 2 is in trouble shooting, at this time, the first isolation valve 310, the third isolation valve 410, the third stop valve 621, the fifth stop valve 623 and the fourth stop valve 631 are closed, and the second isolation valve 721, the first stop valve 611, the second stop valve 613, the eighth stop valve 746 and the seventh stop valve 743 are opened correspondingly, so that the steam in the steam supply device 8, the backpressure machine 1, the first steam supply pipeline 3, the second steam supply pipeline 720, the desuperheater 710, the second steam exhaust pipeline 730, the first steam exhaust pipeline 4 and the external heat supply system 5 can be enabled; meanwhile, in the process of cooling water in the cooling water supply device 750, the first water supply pipeline 740 and the desuperheater 710, heat exchange can be achieved between high-temperature steam and the cooling water, so that cooling of the high-temperature steam can be achieved, the cooled steam is conveyed to the external heating system 5 through the second steam exhaust pipeline 730, and the heating system can still stably operate when the cooler 2 is overhauled and maintained. And the low-temperature medium in the low-temperature medium supply system 6, namely the low-temperature medium conveying flow path 610 and the heater 612, is discharged for subsequent thermodynamic cycle, so that the low-temperature medium supply system 6 can still stably work.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A backpressure machine heating system is characterized by comprising:
the steam inlet of the back press is communicated with a steam supply device;
the cooler is provided with a first channel for steam to flow through and a second channel for low-temperature medium to flow through, so that the steam and the low-temperature medium exchange heat through the cooler, an inlet of the first channel is communicated with a steam exhaust port of the back pressure machine through a first steam supply pipeline, an outlet of the first channel is communicated with an external heat supply system through a first steam exhaust pipeline, and an inlet and an outlet of the second channel are both communicated with a low-temperature medium supply system; and
the temperature reducing device is connected to the first steam supply pipeline in a bypassing mode, so that the temperature of steam flowing through the temperature reducing device can be reduced, and the cooled steam is guided to the external heat supply system.
2. The heating system of a backpressure machine according to claim 1, wherein the cooler comprises an outer cylinder and an inner cylinder located inside the outer cylinder, the outer cylinder and the inner cylinder are arranged coaxially to form the first channel between an inner wall of the outer cylinder and an outer wall of the inner cylinder, and the second channel is formed inside the inner cylinder.
3. The backpressure machine heating system of claim 1, wherein the flow direction of the steam in the first channel is opposite to the flow direction of the cryogenic medium in the second channel.
4. A backpressure-machine heating system according to any one of claims 1-3, wherein the low-temperature medium supply system comprises a low-temperature medium delivery flow path and a first stop valve, a heater and a second stop valve which are sequentially communicated in series along a low-temperature medium flow direction in the low-temperature medium delivery flow path, an inlet of the second channel is communicated with the low-temperature medium delivery flow path through a first flow path, and a connection position of the first flow path and the low-temperature medium delivery flow path is located upstream of the first stop valve, an outlet of the second channel is communicated with the low-temperature medium delivery flow path through a second flow path, and a connection position of the second flow path and the low-temperature medium delivery flow path is located downstream of the second stop valve;
and a third stop valve is arranged on the first flow path, and a fourth stop valve is arranged on the second flow path.
5. The heating system of the back pressure machine according to claim 4, wherein a first regulating valve, a fifth stop valve and a first flow meter are further sequentially communicated in series on the first flow path along the flow direction of the low-temperature medium, and the first regulating valve is located downstream of the third stop valve;
the low-temperature medium conveying flow path is also provided with a first check valve, and the first check valve is positioned at the upstream of the connection position of the low-temperature medium conveying flow path and the first flow path.
6. The heating system of the back pressure machine as claimed in claim 5, wherein an auxiliary flow path is further connected to the low temperature medium delivery flow path, a connection between the water inlet of the auxiliary flow path and the low temperature medium delivery flow path is located upstream of the third stop valve, a connection between the water outlet of the auxiliary flow path and the low temperature medium delivery flow path is located downstream of the fifth stop valve, and a sixth stop valve is provided on the auxiliary flow path.
7. A heating system of a back pressure machine according to any one of claims 1 to 3, wherein the temperature reducing device comprises a temperature reducer, a steam inlet of the temperature reducer is communicated with the first steam supply pipeline through a second steam supply pipeline, a steam outlet of the temperature reducer is communicated with the first steam exhaust pipeline through a second steam exhaust pipeline, and a water inlet of the temperature reducer is communicated with the cooling water supply device through a first water supply pipeline;
the first steam supply pipeline is provided with a first isolation valve, the first isolation valve is positioned at the downstream of the joint of the first steam supply pipeline and the second steam supply pipeline, and the second steam supply pipeline is provided with a second isolation valve.
8. The heating system of a back pressure machine of claim 7, wherein a third isolation valve is further disposed on the first exhaust conduit and is located at an end near the outlet of the first channel and upstream of the connection between the first exhaust conduit and the second exhaust conduit.
9. The heating system of the back pressure machine as claimed in claim 7, wherein the first water supply line is sequentially connected in series with an eighth stop valve, a throttle valve, a second regulating valve, a seventh stop valve, a second flow meter and a second check valve along the flow direction of the cooling water;
and the first water supply pipeline is also communicated with a second water supply pipeline, the joint of the water inlet of the second water supply pipeline and the first water supply pipeline is positioned at the upstream of the eighth stop valve, the joint of the water outlet of the second water supply pipeline and the first water supply pipeline is positioned at the downstream of the seventh stop valve, and the second water supply pipeline is provided with a ninth stop valve.
10. The heating system of the backpressure machine as claimed in claim 1, wherein a third check valve is further arranged on the first steam supply pipeline, and the third check valve is located at one end close to the steam outlet of the backpressure machine and upstream of the connection position of the first steam supply pipeline and the temperature reduction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222989135.8U CN218672137U (en) | 2022-11-08 | 2022-11-08 | Back pressure machine heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222989135.8U CN218672137U (en) | 2022-11-08 | 2022-11-08 | Back pressure machine heating system |
Publications (1)
| Publication Number | Publication Date |
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| CN218672137U true CN218672137U (en) | 2023-03-21 |
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