CN215061312U - Regulating system of low-pressure steam pipe network - Google Patents
Regulating system of low-pressure steam pipe network Download PDFInfo
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- CN215061312U CN215061312U CN202021956147.5U CN202021956147U CN215061312U CN 215061312 U CN215061312 U CN 215061312U CN 202021956147 U CN202021956147 U CN 202021956147U CN 215061312 U CN215061312 U CN 215061312U
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Abstract
The utility model relates to a high pressure steam recycle's of pure condensing steam turbine technical field, concretely relates to governing system of low pressure steam pipe network. This governing system includes pure condensing steam turbine unit, and pure condensing steam turbine unit includes a plurality of cylinders, still includes: one end of the main pipeline is communicated with a cylinder in the pure condensing type steam turbine set, the other end of the main pipeline is communicated with a low-pressure steam pipe network, and the cylinder is a cylinder with steam temperature higher than that of the low-pressure steam pipe network; the check valve is arranged on the main pipeline and used for preventing steam from flowing back to the cylinder; the electric regulating valve is arranged on the main pipeline and is used for regulating the pressure of the low-pressure steam pipe network; and a drain line, the drain line comprising: one end of the drain pipe is communicated with the main pipeline; and the drain valve is arranged on the drain pipe and used for discharging the condensed water in the main pipeline to the outside of the pipeline. The utility model discloses the steam supply volume of low pressure steam pipe network is adjusted to the high pressure steam after utilizing the steam turbine to do work, has improved the generated energy of steam turbine simultaneously.
Description
Technical Field
The utility model relates to a high pressure steam recycle's of pure condensing steam turbine technical field, concretely relates to governing system of low pressure steam pipe network.
Background
Referring to fig. 1, high-pressure steam generated by a dry quenching high-pressure boiler 1 is divided into two parts, one part of the high-pressure steam is sent to a steam turbine set power generation system comprising a steam turbine 10 for power generation, high-grade heat energy is converted into low-grade heat energy and mechanical energy through the steam turbine set power generation system, the mechanical energy is converted into electric energy for heat and electricity for production, and condensed water is discharged into a water tank 3; the other part is sent to a low-pressure steam pipe network 11 through the temperature and pressure reducing device 2 and sent to a whole plant for use, and the company steam pressure is adjusted.
The turbine needs to be coordinated and matched with complete equipment consisting of a boiler (or other steam generator), a generator (or other driven machinery), a condenser, a heater, a pump and the like.
The steam turbine includes a condensing steam turbine and a condensing steam turbine. The condensing steam turbine means that steam is discharged into a condenser after working in the steam turbine except for a few leaked steam. The extraction condensing steam turbine means that if some steam which has done work in the steam turbine is extracted from the steam turbine under one or two pressures, the steam is supplied to industrial or heating, and the rest steam still enters a condenser.
In practice, the inventors found that the above prior art has the following disadvantages:
for a condensing steam turbine, when the pressure of a low-pressure steam pipe network is reduced, the amount of steam supplied by a temperature and pressure reducing device needs to be increased, but the amount of high-pressure steam supplied to the steam turbine is reduced, so that the corresponding amount of power generation is reduced, and the power generation efficiency of the steam turbine is affected.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the utility model is to provide an governing system of low pressure steam pipe network, the technical scheme who adopts specifically as follows:
the utility model provides an governing system of low pressure steam pipe network, this governing system includes pure condensing steam turbine group, pure condensing steam turbine group includes a plurality of cylinders, and this governing system still includes:
one end of the main pipeline is communicated with a cylinder in the pure condensing type steam turbine set, the other end of the main pipeline is communicated with a low-pressure steam pipe network, and the cylinder is a cylinder with steam temperature higher than that of the low-pressure steam pipe network;
the check valve is arranged on the main pipeline and is used for preventing steam from flowing back to the cylinder;
the electric regulating valve is arranged on the main pipeline and is used for regulating the pressure of the low-pressure steam pipe network; and
a drain line, the drain line comprising:
one end of the drain pipe is communicated with the main pipeline;
and the drain valve is arranged on the drain pipe and used for discharging the condensed water in the main pipeline to the outside of the pipeline.
Further, the drain line includes:
the first drain pipeline comprises a first drain pipe and a first drain valve arranged on the first drain pipe, and the first drain pipe is communicated with the main pipeline close to the cylinder; and
and the second drain pipeline comprises a second drain pipe and a second drain valve arranged on the second drain pipe, and the second drain pipe is communicated with the main pipeline close to the low-pressure steam pipe network.
Furthermore, the drain pipeline also comprises a sewage disposal pool for collecting the condensed water drained by the drain valve.
Further, the adjustment system further comprises: and the stop valve is arranged on the main pipeline.
Further, the adjustment system further comprises:
the first pressure gauge is mounted on the main pipeline close to the cylinder and used for monitoring the pressure of steam in the main pipeline close to the cylinder.
Further, the adjustment system further comprises:
and the second pressure gauge is arranged on the main pipeline close to the low-pressure steam pipe network and used for monitoring the pressure of the steam in the main pipeline close to the low-pressure steam pipe network.
Further, the adjustment system further comprises:
the first thermometer is arranged on the main pipeline close to the cylinder and used for monitoring the temperature of the steam in the main pipeline close to the cylinder.
Further, the adjustment system further comprises:
and the second thermometer is arranged on the main pipeline close to the low-pressure steam pipe network and used for monitoring the temperature of the steam in the main pipeline close to the low-pressure steam pipe network.
Further, the adjustment system further comprises:
and the flowmeter is arranged on the main pipeline close to the low-pressure steam pipe network and used for monitoring the flow of the steam in the main pipeline close to the low-pressure steam pipe network.
Further, the outer side of the main pipeline is sequentially coated with a heat preservation layer and a protective layer for heat preservation.
The utility model discloses following beneficial effect has:
the embodiment of the utility model provides a through on the cylinder of steam turbine and install the trunk line between the low pressure pipe network, when the pressure of low pressure steam pipe network reduces, through setting up check valve, electrical control valve and the mutually supporting relation of hydrophobic pipeline on the trunk line, the steam supply volume of low pressure steam pipe network is adjusted to the high-pressure steam after utilizing the steam turbine to do work, has improved the generated energy of steam turbine simultaneously. Because the regulating function of the regulating system replaces the supply of steam to the low-pressure steam pipe network through the temperature and pressure reducing device, a part of high-pressure steam originally supplied to the temperature and pressure reducing device is supplied to the steam turbine, and therefore the power generation capacity of the steam turbine is improved. Meanwhile, the technical problem that steam is required to be diffused to consume in order to avoid the over-rotating speed operation of the steam turbine due to the high steam pressure of the steam turbine is solved.
Drawings
In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive work.
FIG. 1 is a schematic structural view showing a flow direction of high-pressure steam generated from a dry quenching high-pressure boiler in the prior art;
fig. 2 is a schematic structural diagram of a regulating system of a low-pressure steam pipe network according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional structure diagram of a cylinder and main pipe interface according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional structure diagram of a cylinder and main pipe interface according to another embodiment of the present invention.
In the figure: 11. low pressure steam pipe network, 12, main pipe, 13, check valve, 14, electrical control valve, 15, drain pipe, 16, stop valve, 21, first manometer, 22, first thermometer, 23, second manometer, 24, second thermometer, 25, flowmeter, 26, heat preservation, 27, the inoxidizing coating, 10, pure condensing steam turbine group, 101, the cylinder, 102, the through-hole, 151, first trap, 152, first trap, 153, first drain trap, 154, the second trap, 155, the second drain trap, 156, the second blowdown pond.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description will be given, in conjunction with the accompanying drawings and preferred embodiments, of a regulating system for a low pressure steam pipe network, its specific embodiments, structures, features and effects. In the following description, different "one embodiment" or "another embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
It will be understood that when an element is referred to as being "disposed" or "connected" to another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The following describes specifically the specific scheme of the regulating system of the low-pressure steam pipe network provided by the present invention with reference to the accompanying drawings.
Please refer to fig. 2-4, when the pressure of low pressure steam pipe network reduced, steam not enough can cause the influence for company's production, and sufficient in order to solve the assurance low pressure steam pipe network pressure, the technical problem that the high pressure steam volume of supplying with the steam turbine simultaneously is not reducing, the utility model provides a governing system of low pressure steam pipe network adjusts the pressure of low pressure steam pipe network through this governing system, guarantees simultaneously that the stability of steam turbine owner steam pressure and the security of steam turbine operation (main steam pressure is influential to the steam turbine load). The regulating system comprises a pure condensing type steam turbine set 10, a main pipeline 12, a check valve 13, an electric regulating valve 14 and a drainage pipeline 15.
Specifically, the pure condensing steam turbine 10 includes a plurality of cylinders, a hole is formed in a selected cylinder, the cylinder 101 is communicated with the low-pressure steam pipe network 11 through the main pipe 12, and the steam temperature of the perforated cylinder 101 is higher than that of the low-pressure steam pipe network 11. The main pipe 12 is provided with a check valve 13, an electric control valve 14, and a drain line 15. The check valve 13 is used to prevent steam from flowing back into the cylinder 101, so as to achieve the purpose of unidirectional supply of steam from the cylinder 101 to the low-pressure steam pipe network 11. The electric control valve 14 is used for adjusting the pressure of the low-pressure steam pipe network 11, and the pressure of the low-pressure steam pipe network 11 is adjusted in real time through remote control, so that the pressure balance of the low-pressure steam pipe network 11 is kept. The drain line 15 is used for draining condensed water in the main pipeline 12, so that high-pressure steam is prevented from being condensed into water to block the main pipeline 12, and a draining effect is achieved. Specifically, the drain line 15 includes a drain pipe and a drain valve, one end of the drain pipe is communicated with the main pipe 12, and the other end of the drain pipe is communicated with the drain valve.
Referring to fig. 2, as an example, when the steam temperature in the low-pressure steam pipe network 11 is 182 ℃ and the pressure is 0.4MPa, a cylinder with the steam temperature greater than 190 ℃ and the pressure greater than 0.4MPa is selected to form a through hole 102, and the main pipe 12 is welded in the through hole 102.
Specifically, in the present embodiment, the temperature and pressure of the steam in the tenth stage cylinder 101 of the condensing turbine are higher than those of the steam in the low-pressure steam pipe network 11, and the water content of the steam in the tenth stage cylinder is lower than that of the steam in the low-pressure steam pipe network 11, so that the quality of the steam is better. The temperature of the steam in the tenth stage cylinder 101 is 190-220 degrees and the pressure is 0.4-0.64 MPa, so the tenth stage cylinder 101 of the condensing turbine is selected to be most suitable for punching to install the main pipe 12.
As an example, when the main pipe adopts a pipe of DN100, the check valve 13 adopts a check valve of DN100 matched with the main pipe. The electric control valve adopts DN 100.
To sum up, the embodiment of the utility model provides a pair of governing system of low pressure steam pipe network, through on the cylinder of steam turbine and install the trunk line between the low pressure pipe network, when the pressure of low pressure steam pipe network reduces, through setting up the mutually supporting relation of check valve, electrical control valve and hydrophobic pipeline on the trunk line, the steam supply volume of low pressure steam pipe network is adjusted to the high-pressure steam after utilizing the steam turbine to do work, has improved the generated energy of steam turbine simultaneously. Because the regulating function of the regulating system replaces the supply of steam to the low-pressure steam pipe network through the temperature and pressure reducing device, a part of high-pressure steam originally supplied to the temperature and pressure reducing device is supplied to the steam turbine, and therefore the power generation capacity of the steam turbine is improved. Meanwhile, the technical problem that steam is required to be diffused to consume in order to avoid the over-rotating speed operation of the steam turbine due to the high steam pressure of the steam turbine is solved.
As the utility model discloses a another preferred embodiment, because the in-process that steam flows in trunk line 12, the temperature can reduce, the phenomenon of the vapor condensation of different degrees can appear in the different positions of trunk line 12, consequently this embodiment sets up hydrophobic pipeline 15 respectively in the one end that trunk line 12 is close to the cylinder and the one end that is close to low pressure steam pipe network 11 to the timely comdenstion water with in trunk line 12 is discharged. Specifically, a first drain pipe 152 line 15 is provided at one end of the main pipe 12 close to the cylinder 101, and a second drain pipe 155 line 15 is provided at one end of the main pipe 12 close to the low-pressure steam pipe network 11. First trap 152 way 15 includes first trap 152 and first trap 151, and first trap 151 sets up on first trap 152, and first trap 152 communicates with main pipe 12 near cylinder 101 for the comdenstion water in the main pipe 12 near cylinder 101 discharges. Second trap 155 way 15 includes second trap 155 and second trap 154, and second trap 154 sets up on second trap 155, and second trap 155 communicates with main pipeline 12 that is close to low pressure steam pipe network 11 for the comdenstion water in the main pipeline 12 that the discharge is close to low pressure steam pipe network 11 prevents that high pressure steam from condensing into water and blockking up main pipeline 12.
As one example, the first and second traps are each implemented as the trap of DN 25.
As another preferred embodiment of the present invention, the drain line 15 further comprises a drainage basin for collecting the condensed water discharged from the drain valve. When the main pipe 12 is provided with the drain pipes 15 at one end close to the cylinder and one end close to the low pressure steam pipe network 11, a first drain tank 153 for collecting the condensed water discharged from the first drain valve 151 and a second drain tank 156 for collecting the condensed water discharged from the second drain valve 154 are correspondingly provided.
As another preferred embodiment of the present invention, the adjusting system further comprises a stop valve, which is installed on the main pipe. With the flow direction of steam as the reference, on the main pipeline, high-pressure steam passes through the stop valve firstly and then passes through the pressure gauge, the thermometer and the flowmeter. This stop valve generally is normally open state, need close when the pipeline overhauls to convenient maintenance pipeline and valve, including manometer, thermometer, flowmeter.
As an example, the stop valve is a DN100 stop valve, and is disposed at a middle position of the main pipeline.
As another preferred embodiment of the present invention, for better monitoring the steam pressure in the main pipe 12 close to the cylinder 101, a first pressure gauge 21 is installed on the main pipe 12 close to the cylinder 101.
As another preferred embodiment of the present invention, for better monitoring of the steam pressure in the main pipe 12 close to the low pressure steam pipe network 11, a second pressure gauge 23 is installed on the main pipe 12 close to the low pressure steam pipe network 11.
As another preferred embodiment of the present invention, a first thermometer 22 is installed on the main pipe 12 near the cylinder 101 for better monitoring the temperature of the steam in the main pipe 12 near the cylinder 101.
As another preferred embodiment of the present invention, for better monitoring of the steam temperature in the main pipe 12 close to the low pressure steam pipe network 11, a second thermometer 24 is installed on the main pipe 12 close to the low pressure steam pipe network 11.
As another preferred embodiment of the present invention, for monitoring the flow of steam in the main pipe 12 close to the low pressure steam pipe network 11, the flow meter 25 is installed on the main pipe 12 close to the low pressure steam pipe network 11 to facilitate the adjustment.
Referring to fig. 3, as another preferred embodiment of the present invention, in order to reduce the temperature decrease of the steam in the main pipe 12 and reduce the energy loss, an insulating layer 26 and a protective layer 27 for thermal insulation are sequentially coated on the outer side of the main pipe 12.
As an example, the insulation layer 26 may be insulation wool and the protective layer 27 may be aluminum skin.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides an governing system of low pressure steam pipe network, this governing system include pure condensing steam turbine group, pure condensing steam turbine group includes a plurality of cylinders, its characterized in that, this governing system still includes:
one end of the main pipeline is communicated with a cylinder in the pure condensing type steam turbine set, the other end of the main pipeline is communicated with a low-pressure steam pipe network, and the cylinder is a cylinder with steam temperature higher than that of the low-pressure steam pipe network;
the check valve is arranged on the main pipeline and is used for preventing steam from flowing back to the cylinder;
the electric regulating valve is arranged on the main pipeline and is used for regulating the pressure of the low-pressure steam pipe network; and
a drain line, the drain line comprising:
one end of the drain pipe is communicated with the main pipeline;
and the drain valve is arranged on the drain pipe and used for discharging the condensed water in the main pipeline to the outside of the pipeline.
2. The system of claim 1, wherein the drain line comprises:
the first drain pipeline comprises a first drain pipe and a first drain valve arranged on the first drain pipe, and the first drain pipe is communicated with the main pipeline close to the cylinder; and
and the second drain pipeline comprises a second drain pipe and a second drain valve arranged on the second drain pipe, and the second drain pipe is communicated with the main pipeline close to the low-pressure steam pipe network.
3. The system of claim 1 or 2, wherein the drain line further comprises a drain for collecting condensate drained by the trap.
4. A system for regulating a network of low pressure steam pipes according to claim 1 or 2, characterized in that it further comprises: and the stop valve is arranged on the main pipeline.
5. A system for regulating a network of low pressure steam pipes according to claim 1 or 2, characterized in that it further comprises:
the first pressure gauge is mounted on the main pipeline close to the cylinder and used for monitoring the pressure of steam in the main pipeline close to the cylinder.
6. The system of claim 5, further comprising:
and the second pressure gauge is arranged on the main pipeline close to the low-pressure steam pipe network and used for monitoring the pressure of the steam in the main pipeline close to the low-pressure steam pipe network.
7. A system for regulating a network of low pressure steam pipes according to claim 1 or 2, characterized in that it further comprises:
the first thermometer is arranged on the main pipeline close to the cylinder and used for monitoring the temperature of the steam in the main pipeline close to the cylinder.
8. The system of claim 7, further comprising:
and the second thermometer is arranged on the main pipeline close to the low-pressure steam pipe network and used for monitoring the temperature of the steam in the main pipeline close to the low-pressure steam pipe network.
9. The system of claim 1, further comprising:
and the flowmeter is arranged on the main pipeline close to the low-pressure steam pipe network and used for monitoring the flow of the steam in the main pipeline close to the low-pressure steam pipe network.
10. The system of claim 1, wherein the main pipe is sequentially coated with an insulating layer and a protective layer for thermal insulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021956147.5U CN215061312U (en) | 2020-09-09 | 2020-09-09 | Regulating system of low-pressure steam pipe network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021956147.5U CN215061312U (en) | 2020-09-09 | 2020-09-09 | Regulating system of low-pressure steam pipe network |
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| CN215061312U true CN215061312U (en) | 2021-12-07 |
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| CN202021956147.5U Active CN215061312U (en) | 2020-09-09 | 2020-09-09 | Regulating system of low-pressure steam pipe network |
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