CN117927931A - Master pipe main steam system - Google Patents

Abstract

The utility model relates to a main steam system of parent tube system, including first boiler, first turbine, second boiler, second turbine, main line and governing system, governing system sets up on the main line, first boiler with first turbine passes through first branch road and links to each other, second boiler with second turbine passes through the second branch road and links to each other, main line intercommunication in first branch road with the second branch road, wherein, temperature and the pressure of medium are higher than in the first branch road medium temperature and pressure in the second branch road, governing system is used for adjusting the process main line medium temperature and pressure. Through the technical scheme, the main steam system for the main pipe provided by the disclosure has good applicability and safety.

Description

Master pipe main steam system

Technical Field

The disclosure relates to the technical field of thermal power generation, in particular to a main steam system of a main pipe.

Background

The thermal power plant is accompanied with economic development, presents a situation of staged construction, and has the characteristics of main steam parameter rise and different boiler types along with the development of thermal power technology. The main steam system of the thermal power plant refers to a system before steam generated by a boiler enters a steam turbine generator unit to do work, and a main pipe system plays a very strong role in guaranteeing the thermal power generator unit (such as condensation, back pressure and the like) mainly supplying heat. In the related art, both centralized master control and switching master control require that the outlet steam parameters of two boilers are consistent, so that when any boiler has a problem, the heat supply can be continued through the other boiler, and the system is not suitable for a main steam system with boilers of different types.

Disclosure of Invention

The main steam system of the main pipe has good applicability and safety.

In order to achieve the above object, the present disclosure provides a main steam system for manufacturing a main pipe, including a first boiler, a first turbine, a second boiler, a second turbine, a main pipe and a regulating system, wherein the regulating system is disposed on the main pipe, the first boiler and the first turbine are connected through a first branch, the second boiler and the second turbine are connected through a second branch, the main pipe is communicated with the first branch and the second branch, wherein the temperature and the pressure of a medium in the first branch are higher than those in the second branch, and the regulating system is used for regulating the temperature and the pressure of the medium passing through the main pipe.

Optionally, the regulating system comprises a pressure reducing valve, a regulator and a warm water pipeline, wherein the pressure reducing valve is arranged at the upstream of the regulator, the warm water pipeline is communicated with the regulator and is provided with a warm water regulating valve, and the warm water regulating valve is used for selectively communicating or blocking the warm water pipeline and the regulator.

Optionally, the regulating system includes a first drainage system, the first drainage system includes a first drainage pipeline, a first drainage bypass and a first steam trap, the both ends of first drainage pipeline communicate respectively the pressure reducing valve upstream and the regulator downstream, a steam trap sets up on the first drainage pipeline, a drainage bypass communicate in the first drainage pipeline, and a drainage bypass with the communication point of first drainage pipeline is located the upper reaches of steam trap, a drainage bypass is provided with first open and close valve for selectively communicating or blocking first drainage bypass with first drainage pipeline.

Optionally, the regulating system further comprises a safety valve provided on the regulator and arranged near an end of the regulator.

Optionally, the temperature regulating system comprises a first thermometer, a second thermometer and a pressure gauge which are arranged on the main pipeline, wherein the first thermometer is arranged at the upstream of the pressure reducing valve, and the second thermometer and the pressure gauge are respectively arranged on the regulator and are close to the tail end of the regulator.

Optionally, the main steam system of the main pipe system comprises a check valve and a flow meter, wherein the check valve is arranged on the main pipe, and the flow meter is arranged at the downstream of the regulating system and close to the regulating system.

Optionally, the main steam system of main pipe system includes the second drainage system, the second drainage system includes second drainage pipeline, second drainage bypass and second steam trap, the both ends of second drainage pipeline communicate respectively the upstream and the low reaches of check valve, the second steam trap sets up on the second drainage pipeline, the second drainage bypass intercommunication in the second drainage pipeline, and the second drainage bypass with the connected point of second drainage pipeline is located the upper reaches of second steam trap, the second drainage bypass is provided with the second open and close valve for selectively communicate or block second drainage bypass with the second drainage pipeline.

Optionally, the main steam system of main pipe system includes first automatic valve, first motorised valve and second motorised valve, first automatic valve sets up the output of first turbine is used for closing first turbine, first motorised valve and second motorised valve set up respectively on the first branch, first motorised valve is close to first boiler setting up for selectively communicate or block first boiler and first branch, second motorised valve is close to first turbine setting for selectively communicate or block first turbine and first branch.

Optionally, the main steam system of main pipe system includes second automatic valve, third motorised valve and fourth motorised valve, the second automatic valve sets up the output of second steam turbine is in order to be used for closing the second steam turbine, third motorised valve with fourth motorised valve sets up respectively on the second branch, the third motorised valve is close to the second boiler sets up for selectively communicate or block the second boiler with the second branch, the fourth motorised valve is close to the second steam turbine sets up for selectively communicate or block the second steam turbine with the second branch.

Optionally, the main steam system of the main pipe system comprises a first isolation valve and a second isolation valve, wherein the first isolation valve is arranged close to the first branch pipe and used for selectively communicating or blocking the first branch pipe with the main pipe, and the second isolation valve is arranged close to the first branch pipe and used for selectively communicating the second branch pipe with the main pipe.

According to the technical scheme, in the main pipe main steam system provided by the disclosure, parameters of the first boiler and the first steam turbine connected through the first branch are larger than parameters of the second boiler and the second steam turbine connected through the second branch, that is, the pressure and the temperature of steam in the first branch are higher than those of the second branch, wherein the first branch and the second branch are communicated through the main pipeline, and the main pipeline is provided with the regulating system, so that when the first steam turbine on the first branch breaks down, steam generated by the first boiler flows into the main pipeline through the first branch, is cooled and depressurized through the regulating system and enters the second branch, and then enters the second steam turbine for use, and the first boiler is prevented from being forced to stop due to the fact that the first steam turbine breaks down; when the second boiler on the second branch breaks down, the steam generated by the first boiler is cooled and depressurized through the regulating system to enter the second branch and then enter the second steam turbine for use, so that the condition that the second steam turbine is stopped due to the fact that the second boiler breaks down is avoided, and the applicability and safety of the main steam system of the main pipe system can be improved.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

Fig. 1 is a schematic structural diagram of a main steam system of a main pipe provided in an embodiment of the present disclosure.

Description of the reference numerals

100-Main pipeline; 110-a first boiler; 120-a first turbine; 130-a first leg; 210-a second boiler; 220-a second turbine; 230-a second leg; 300-a regulating system; 310-a pressure reducing valve; 320-regulator; 330-warm water pipeline; 331-a warm water regulating valve; 340-a safety valve; 350-a first thermometer; 360-a second thermometer; 370-manometer; 400-a first hydrophobic system; 410-a first hydrophobic line; 420-a first hydrophobic bypass; 421-a first on-off valve; 430-a first steam trap; 510-check valve; 520-flowmeter; 600-a second hydrophobic system; 610-a second hydrophobic line; 620-a second hydrophobic bypass; 621-a second opening/closing valve; 630-second steam trap; 710-a first automatic valve; 720-a first electrically operated valve; 730-a second electrically operated valve; 810-a second automatic valve; 820-a third electrically operated valve; 830-fourth electrically operated valve; 910-a first isolation valve; 920-second isolation valve.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise stated, use of terms such as "inner" and "outer" generally refer to "inner" and "outer" with respect to the outline of the corresponding component, and the terms "first", "second", etc. are used to distinguish one element from another without order or importance. Furthermore, in the following description, when referring to the drawings, the same reference numerals in different drawings denote the same or similar elements unless otherwise explained. The foregoing definitions are provided for the purpose of illustrating and explaining the present disclosure and should not be construed as limiting the present disclosure.

In order to achieve the above object, the present disclosure provides a main steam system for manufacturing a main pipe, comprising a first boiler 110, a first turbine 120, a second boiler 210, a second turbine 220, a main pipe 100 and a regulating system 300, wherein the regulating system 300 is disposed on the main pipe 100, the first boiler 110 and the first turbine 120 are connected through a first branch 130, the second boiler 210 and the second turbine 220 are connected through a second branch 230, the main pipe 100 is communicated with the first branch 130 and the second branch 230, wherein the temperature and pressure of the medium in the first branch 130 are higher than the temperature and pressure of the medium in the second branch 230, and the regulating system 300 is used for regulating the temperature and pressure of the medium passing through the main pipe 100.

According to the technical scheme, in the main pipe system main steam system provided by the disclosure, parameters of the first boiler 110 and the first steam turbine 120 connected through the first branch 130 are larger than parameters of the second boiler 210 and the second steam turbine 220 connected through the second branch 230, that is, the pressure and the temperature of steam in the first branch 130 are higher than those of the second branch 230, wherein the first branch 130 and the second branch 230 are communicated through the main pipe 100, and the main pipe 100 is provided with the regulating system 300, so that when the first steam turbine 120 on the first branch 130 fails, the steam generated by the first boiler 110 flows into the main pipe 100 through the first branch 130, is cooled and depressurized through the regulating system 300 and then enters the second branch 230, and then enters the second steam turbine 220 for use, thereby avoiding forced stopping of the first boiler 110 due to failure of the first steam turbine 120; when the second boiler 210 on the second branch 230 fails, the steam generated by the first boiler 110 is cooled and depressurized through the adjusting system 300 to enter the second branch 230 and then enter the second steam turbine 220 for use, so as to avoid the occurrence of the condition that the second steam turbine 220 is stopped due to the failure of the second boiler 210, thereby improving the applicability and safety of the main steam system of the main pipe system.

In the main steam system of the main pipe provided in the present disclosure, the adjusting system 300 may be configured in any suitable form to achieve cooling and depressurization of the steam in the first branch 130, which is not particularly limited in the present disclosure. As an exemplary embodiment, referring to fig. 1, the regulating system 300 may include a pressure reducing valve 310, a regulator 320, and a warm water pipe 330, the pressure reducing valve 310 may be disposed upstream of the regulator 320, the warm water pipe 330 may be connected to the regulator 320 and provided with a warm water regulating valve 331, the warm water regulating valve 331 may be used to selectively connect or intercept the warm water pipe 330 and the regulator 320, wherein the pressure reducing valve 310 may be configured as an on-off valve for controlling the amount of high parameter steam introduced into the regulator 320 from the main pipe 100, the warm water pipe 330 may be used to introduce low temperature water into the regulator 320, and the warm water pipe 330 may be further provided with a warm water regulating valve 331 to enable controlling the amount of warm water introduced into the regulator 320, such that the purpose of regulating the pressure and temperature of the steam introduced into the regulator 320 can be achieved by the cooperation of the pressure reducing valve 310 and the warm water pipe 330.

In the main steam system for mother pipe provided in the present disclosure, as an exemplary embodiment, referring to fig. 1, the conditioning system 300 may further include a first drain system 400, the first drain system 400 including a first drain pipe 410, a first drain bypass 420, and a first steam trap 430, both ends of the first drain pipe 410 may be respectively connected upstream of the pressure reducing valve 310 and downstream of the regulator 320, the first steam trap 430 is disposed on the first drain pipe 410, the first drain bypass 420 may be connected to the first drain pipe 410, and a connection point of the first drain bypass 420 and the first drain pipe 410 is located upstream of the first drain pipe 430, and a first on-off valve 421 may be disposed on the first drain bypass 420 for selectively connecting or blocking the first drain bypass 420 and the first drain pipe 410, the first drain system 400 is used for performing a drain operation on a pipe upstream of the regulator 320, in particular, when the system is not used for a long time or is put into use for the first time, a heating pipe operation is generally required, by controlling the first drain bypass 420 to be opened, and thus the first drain pipe 420 can be closed by controlling the first drain bypass 420 to flow out through the first drain pipe 420; after the system is operated for a period of time, the condensed water is reduced to a trace amount due to the temperature rise in the pipeline, at this time, the first drain bypass 420 is closed by controlling the first on-off valve 421, and the first drain pipeline 410 is opened by controlling the first drain trap 430 and keeps the automatic drain trap in an operating state, so that the drain water in the pipeline upstream of the regulator 320 can enter the pipeline downstream of the regulator 320 through the first drain pipeline, and the condensed water can be gasified due to the pressure drop in the pipeline after entering the downstream of the regulator 320 because the air pressure and the temperature of the steam in the pipeline are higher than the air pressure and the temperature of the steam in the pipeline downstream of the regulator 320, and finally enters the second steam turbine 220 along with the steam in the pipeline downstream of the regulator 320 for achieving the purpose of recovering the condensed water.

In the main steam system for a main pipe provided in the present disclosure, as an exemplary embodiment, referring to fig. 1, the conditioning system 300 may further include a safety valve 340, and the safety valve 340 may be disposed on the regulator 320 and disposed near an end of the regulator 320 for detecting a steam pressure in the regulator 320, and the disposition of the safety valve 340 near the end of the regulator 320 may enable the first time detection of the steam pressure at the outlet of the regulator 320, avoid occurrence of an outlet overpressure phenomenon, and improve safety of the main steam system for a main pipe.

The temperature regulating system may further include a first thermometer 350, a second thermometer 360 and a pressure gauge 370 disposed on the main pipe 100, the first thermometer 350 may be disposed upstream of the pressure reducing valve 310, and the second thermometer 360 and the pressure gauge 370 may be disposed on the regulator 320 and near the end of the regulator 320, respectively, for detecting the temperature and pressure of the steam flowing through the regulator 320, so that a worker responds to an abnormal situation in time, thereby improving the safety of the main steam system.

In the main steam system of the main pipe provided in the present disclosure, as an exemplary embodiment, referring to fig. 1, the main steam system of the main pipe may include a check valve 510 and a flow meter 520, the check valve 510 may be disposed on the main pipe 100, the flow meter 520 may be disposed downstream of the conditioning system 300 and close to the conditioning system 300, wherein the flow meter 520 is used to detect an outlet flow rate of the regulator 320, and the check valve 510 is used to prevent a situation in which steam having a lower temperature and pressure generated from the second boiler 210 due to pressure non-uniformity in the main pipe 100 is fleed into the first steam turbine 120 when the first boiler 110 fails to supply steam having a higher temperature and pressure.

In the main steam system of the present disclosure, as an exemplary embodiment, referring to fig. 1, the main steam system of the main pipe may include a second drain system 600, the second drain system 600 may include a second drain pipe 610, a second drain bypass 620, and a second drain 630, both ends of the second drain pipe 610 may communicate upstream and downstream of the check valve 510, respectively, the second drain 630 may be disposed on the second drain pipe 610, the second drain bypass 620 may communicate with the second drain pipe 610, and a communication point of the second drain bypass 620 and the second drain pipe 610 may be located upstream of the second drain 630, and the second drain bypass 620 may be provided with a second open/close valve 621 for selectively communicating or blocking the second drain bypass 620 and the second drain pipe 610. The second drain system 600 is used for draining the pipe downstream of the regulator 320, specifically, when the system is not used for a long time or is put into use for the first time, a heating pipe operation is generally required, at this time, the second drain bypass 620 is opened by controlling the second on-off valve 621, and the second drain pipe 610 is closed by controlling the second drain trap 630, so that condensed water in the pipe can flow out through the second drain bypass 620; after the system is operated for a period of time, the condensed water is reduced to a trace amount due to the temperature rise in the pipeline, at this time, the second drain bypass 620 is closed by controlling the second drain pipe 621, and the first drain pipe 410 is opened by controlling the second drain pipe 630 and the second drain pipe 630 is kept in an operating state, so that the drain water in the pipeline upstream of the check valve 510 can enter the pipeline downstream of the check valve 510 through the first drain pipe, and the condensed water can be gasified due to the pressure reduction in the pipeline after entering the downstream of the check valve 510 because the air pressure and the temperature of the steam in the pipeline upstream of the check valve 510 are higher than those in the pipeline downstream of the check valve 510, and finally enter the second steam turbine 220 together with the steam in the pipeline downstream of the regulator 320 for achieving the purpose of condensed water recovery.

In the parent pipe main steam system provided in the present disclosure, as an exemplary embodiment, referring to fig. 1, the parent pipe main steam system includes a first automatic valve 710, a first electric valve 720 and a second electric valve 730, the first automatic valve 710 may be disposed at an output end of the first turbine 120 for closing the first turbine 120, the first electric valve 720 and the second electric valve 730 may be disposed on the first branch 130, respectively, the first electric valve 720 may be disposed near the first boiler 110 for selectively communicating or blocking the first boiler 110 and the first branch 130, and the second electric valve 730 may be disposed near the first turbine 120 for selectively communicating or blocking the first turbine 120 and the first branch 130, wherein the first automatic valve 710 may be rapidly responsive to close the first turbine 120 when an abnormality occurs in the first turbine 120, and the first electric valve 720 and the second electric valve 730 may be respectively used to cut off communication between the first boiler 110 and the first turbine 120 and the first branch 130, so as to enable isolation of the first boiler 110 or the first turbine 120 from operating and maintenance personnel when a failure of the first boiler 110 occurs. For example, when the first turbine 120 fails, the first automatic valve 710 responds rapidly to close the first turbine 120, and closes the second electric valve 730 to block the connection between the first turbine 120 and the first branch 130, so that the first electric valve 720 is kept open, and the steam generated by the first boiler 110 can smoothly enter the first branch 130 and then flow into the main pipeline 100, thus the first turbine 120 is cut off without affecting the system operation, and the maintenance operation is facilitated for the staff.

In the main steam system of the present disclosure, as an exemplary embodiment, referring to fig. 1, the main steam system of the present disclosure includes a second automatic valve 810, a third electric valve 820, and a fourth electric valve 830, the second automatic valve 810 may be disposed at an output end of the second steam turbine 220 for closing the second steam turbine 220, the third electric valve 820 and the fourth electric valve 830 may be disposed on the second branch 230, respectively, the third electric valve 820 may be disposed near the second boiler 210 for selectively communicating or blocking the second boiler 210 and the second branch 230, and the fourth electric valve 830 may be disposed near the second steam turbine 220 for selectively communicating or blocking the second steam turbine 220 and the second branch 230, wherein the second automatic valve 810 may be rapidly responsive to close the second steam turbine 220 when an abnormality occurs in the second steam turbine 220, and the third electric valve 820 and the fourth electric valve 830 may be respectively used to cut off communication between the second boiler 210 and the second steam turbine 220 to enable isolation of the second steam turbine 220 from working personnel when the second boiler 210 or the second steam turbine 220 fails to perform maintenance work and the maintenance operation of the second steam turbine 220. For example, when the second boiler 210 fails, the third electric valve 820 is closed to stop the connection between the second boiler 210 and the second branch 230, and the fourth electric valve 830 is kept open, so that the steam in the main pipeline 100 can smoothly flow into the second branch 230 and then enter the second steam turbine 220 for use, and thus, the second boiler 210 is cut off without affecting the system operation, and the maintenance work is facilitated for the staff.

The main steam system of the main pipe may further include a first isolation valve 910 and a second isolation valve 920, wherein the first isolation valve 910 may be disposed close to the first branch 130 for selectively communicating or blocking the first branch 130 with the main pipe 100, and the second isolation valve 920 may be disposed close to the first branch 130 for selectively communicating the second branch 230 with the main pipe 100, so that after the main steam system of the main pipe is used, the first branch 130 and the second branch 230 may be disconnected from the main pipe 100 by closing the first isolation valve 910 and the second isolation valve 920, thereby facilitating a worker to complete a system exit operation.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (10)

1. The utility model provides a main steam system of main pipe system, its characterized in that includes first boiler, first turbine, second boiler, second turbine, main line and governing system, governing system sets up on the main line, first boiler with first turbine passes through first branch road and links to each other, second boiler with second turbine passes through the second branch road and links to each other, main line intercommunication in first branch road with the second branch road, wherein, temperature and the pressure of medium are higher than in the first branch road medium are in the second branch road are used for adjusting temperature and the pressure of medium through the main line.

2. The main steam system of a parent pipe according to claim 1, wherein the regulating system comprises a pressure reducing valve, a regulator and a warm water line, the pressure reducing valve being arranged upstream of the regulator, the warm water line being in communication with the regulator and being provided with a warm water regulating valve for selectively communicating or blocking the warm water line with the regulator.

3. The main steam system according to claim 2, wherein the regulating system comprises a first drain system, the first drain system comprises a first drain pipe, a first drain bypass and a first steam trap, two ends of the first drain pipe are respectively communicated with the upstream of the pressure reducing valve and the downstream of the regulator, the first steam trap is arranged on the first drain pipe, the first drain bypass is communicated with the first drain pipe, and a communication point of the first drain bypass and the first drain pipe is located on the upstream of the first steam trap, and a first opening and closing valve is arranged on the first drain bypass and used for selectively communicating or blocking the first drain bypass and the first drain pipe.

4. The main steam system of claim 2, wherein the conditioning system further comprises a relief valve disposed on the conditioner and disposed proximate an end of the conditioner.

5. The main pipe system of claim 2, wherein the conditioning system comprises a first thermometer, a second thermometer and a pressure gauge disposed on the main pipe, the first thermometer being disposed upstream of the pressure relief valve, the second thermometer and the pressure gauge being disposed on the regulator and disposed proximate to ends of the regulator, respectively.

6. The main pipe system of claim 1, wherein the main pipe system comprises a check valve disposed on the main pipe and a flow meter disposed downstream of and proximate to the conditioning system.

7. The main steam system according to claim 6, wherein the main steam system comprises a second drain system, the second drain system comprises a second drain pipe, a second drain bypass and a second steam trap, two ends of the second drain pipe are respectively communicated with the upstream and downstream of the check valve, the second steam trap is arranged on the second drain pipe, the second drain bypass is communicated with the second drain pipe, and a communication point of the second drain bypass and the second drain pipe is located on the upstream of the second steam trap, and a second opening and closing valve is arranged on the second drain bypass and used for selectively communicating or blocking the second drain bypass and the second drain pipe.

8. The parent pipe main steam system as set forth in claim 1, wherein the parent pipe main steam system comprises a first automatic valve, a first electrically operated valve, and a second electrically operated valve, the first automatic valve being disposed at an output of the first turbine for shutting down the first turbine,

The first electric valve and the second electric valve are respectively arranged on the first branch, the first electric valve is close to the first boiler and used for selectively communicating or blocking the first boiler with the first branch, and the second electric valve is close to the first turbine and used for selectively communicating or blocking the first turbine with the first branch.

9. The main pipe system according to claim 1, wherein the main pipe system comprises a second automatic valve, a third electric valve and a fourth electric valve, the second automatic valve being arranged at an output end of the second turbine for shutting down the second turbine,

The third electric valve and the fourth electric valve are respectively arranged on the second branch, the third electric valve is close to the second boiler and used for selectively communicating or blocking the second boiler and the second branch, and the fourth electric valve is close to the second turbine and used for selectively communicating or blocking the second turbine and the second branch.

10. The parent pipe main steam system of any one of claims 1-9, comprising a first isolation valve disposed proximate to the first branch for selectively communicating or blocking the first branch with the main conduit and a second isolation valve disposed proximate to the first branch for selectively communicating the second branch with the main conduit.