CN212389396U - System for realizing multi-combined supply of steam, gas and water of coal-fired generator set - Google Patents
System for realizing multi-combined supply of steam, gas and water of coal-fired generator set Download PDFInfo
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- CN212389396U CN212389396U CN202021952013.6U CN202021952013U CN212389396U CN 212389396 U CN212389396 U CN 212389396U CN 202021952013 U CN202021952013 U CN 202021952013U CN 212389396 U CN212389396 U CN 212389396U
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Abstract
The utility model discloses a system for realize coal-fired generating set vapour gas water confession that allies oneself with more, including boiler, high pressure jar, intermediate pressure jar, low temperature multiple-effect sea water desalination device and backpressure steam turbine, the pivot coaxial coupling of high pressure jar, intermediate pressure jar and low pressure jar drives the generator electricity generation jointly. The exhaust steam of the boiler is conveyed to a high-pressure cylinder to do work; after exhaust steam of the high-pressure cylinder is reheated by the boiler, one part of the exhaust steam is conveyed to the intermediate-pressure cylinder to do work, and the other part of the exhaust steam is used as host heat and is re-extracted steam and conveyed to the back pressure steam turbine and the temperature and pressure reducer and is output as industrial steam; the utility model discloses a set up the backpressure steam turbine and drag the air compressor work and externally supply compressed air, the backpressure machine through-flow sets up rotatory baffle and draws gas and supply industrial steam outward, and the exhaust is supplied with low temperature multiple-effect sea water desalination and is prepared fresh water outer supply, has realized being transferred to the comprehensive energy service base by traditional coal-electricity, promotes coastal area coal-electricity viability and sustainable development ability under the new trend.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the energy comprehensive utilization field relates to a system for realize that coal-fired generating set vapour gas water allies oneself with confession more.
[ background of the invention ]
With the development of global economy, energy and environmental protection situation, the current coal-fired power plant will face more strict environmental protection requirements and severe market operation situation, which mainly shows that: 1) the electric quantity scheduling is adjusted from nameplate scheduling to energy-saving scheduling step by step, and the coal-fired power station is required to continuously save energy and reduce consumption; 2) the thermal power generation hours are reduced, and the profitability of the power generation side is reduced; 3) renewable energy utilization rate is low, the demand of thermal power generating unit on flexibility peak regulation is urgent, the coal-fired power station is gradually transformed from the current power supply main power to the peak regulation main power, the low-load frequency and frequent peak regulation are the main current situations of the coal-fired power station in a period of the future, and the duration of the current situations depends on the power development of new energy such as wind power, light water and the like and the industrial production of energy storage technologies. At present, the maximum peak-to-valley difference in China is about 25% of the highest load, and the peak regulation requirement of the current power system is about 45% by adding a wind-light power supply accounting for 20%. The coal-electricity enterprises need to actively change concepts: 1) gradual angle matching rotation from the main power of a power supply: the annual utilization time is between hours and 4000 hours. 2) Transformation of pure power supply to comprehensive energy supply base gradually: electricity, heat, steam, gas, cold, water.
Fresh water resources in coastal areas are short, the project cost of main flow south-to-north water transfer is relatively high, the supply is not in demand, and seawater desalination is used as an important guarantee for local water resources. The main technical route of seawater desalination comprises a thermal method and a membrane method, the membrane method has the main defects of large floor area, large chemical consumption, seawater temperature-dependent performance and the like, and the application prospect is slightly lower than that of the thermal method.
[ Utility model ] content
An object of the utility model is to solve the problem among the prior art, provide a system that realizes coal-fired generating set vapour gas water antithetical couplet confession.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a system for realizing multi-combined supply of steam, gas and water of a coal-fired generator set comprises:
the exhaust steam of the boiler is conveyed to the high-pressure cylinder to do work;
the high-pressure cylinder is used for reheating the exhaust steam of the high-pressure cylinder by a boiler, one part of the exhaust steam is conveyed to the intermediate pressure cylinder to do work, and the other part of the exhaust steam is used as host heat and is re-extracted steam and conveyed to the back pressure steam turbine, the temperature and pressure reducer and is output as industrial steam;
the exhaust steam of the intermediate pressure cylinder is conveyed to the low pressure cylinder to do work;
the low-pressure cylinder is used for heating exhaust steam of the low-pressure cylinder through a water supply system with a condenser and then refluxing the exhaust steam to the boiler to form exhaust steam circulation;
the inlet of the low-temperature multi-effect seawater desalination device is connected with an original seawater taking pump, and the outlet of the low-temperature multi-effect seawater desalination device is connected with a fresh water delivery pump; the fresh water delivery pump pressurizes and outputs the desalinated seawater, one part of the desalinated seawater is output as finished water, one part of the desalinated seawater is consumed by the coal-fired unit and delivered to a water supply system, and the last part of the desalinated seawater is delivered to a temperature and pressure reducing device as temperature reducing water;
the steam exhaust of the backpressure steam turbine is output as industrial steam, and the working exhaust steam is conveyed to the temperature and pressure reducing device; an output shaft of the backpressure steam turbine is connected with an air compressor.
The utility model discloses further improvement lies in:
the water supply system comprises a condenser, a condensate pump, a low-pressure heater group, a water supply pump and a high-pressure heater group which are connected in sequence; the inlet of the condenser is connected with the exhaust of the low-pressure cylinder; pressurizing a part of desalinated seawater by a fresh water delivery pump and delivering the desalinated seawater to an inlet pipeline of a condensate pump; the outlet of the high-pressure heater group is connected with the boiler.
The fresh water delivery pump is connected with the temperature and pressure reducing device through a first valve group.
And the low-temperature multi-effect seawater desalting device is connected with a water ring vacuum pump set for pumping out non-condensable gas.
And the rotating shafts of the high pressure cylinder, the intermediate pressure cylinder and the low pressure cylinder are coaxially connected and drive the generator to generate power together.
The hot re-extraction steam of the main engine is output as part of exhaust steam of the industrial steam through a second valve group and a fourth valve group; conveying a portion of the exhaust steam to a back pressure turbine through a third valve group; and a part of the exhausted steam is conveyed to the temperature and pressure reducing device through the second valve group and the fifth valve group.
A seventh valve group is arranged at the acting steam exhaust end of the backpressure steam turbine; and an eighth valve group is arranged at an inlet of the intermediate pressure cylinder.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a set up the backpressure steam turbine and drag the air compressor work and externally supply compressed air, the backpressure machine through-flow sets up rotatory baffle and draws gas and supply industrial steam outward, and the exhaust is supplied with low temperature multiple effect sea water desalination and is prepared fresh water and supply outward, on the basis of selling electricity alone at present, has increased products such as industry steam supply, compressed air and fresh water, has realized changeing the type to comprehensive energy service base by traditional coal-electricity, promotes coastal area coal-electricity viability and sustainable development ability under the new trend.
[ description of the drawings ]
Fig. 1 is a schematic diagram of the system of the present invention.
Wherein, 1-a boiler; 2-high pressure cylinder; 3-a medium pressure cylinder; 4-low pressure cylinder; 5-a generator; 6-a condenser; 7-a condensate pump; 8-low pressure heater group; 9-a water supply pump; 10-high pressure heater group 11-back pressure steam turbine; 12-an air compressor; 13-a raw seawater pump; 14-low-temperature multi-effect seawater desalination device; 15-a fresh water delivery pump; 16-water ring vacuum pump set; 17-temperature and pressure reduction device; 18-a first valve group; 19-a second valve group; 20-a third valve group; 21-fourth valve group; 22-fifth valve group; 23-sixth valve group; 24-a seventh valve group; 25-eighth valve group.
[ detailed description ] embodiments
In order to make the technical solution of the present invention better understood, the following figures in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments, and do not limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
In the context of the present disclosure, when a layer/element is referred to as being "on" another layer/element, it can be directly on the other layer/element or intervening layers/elements may be present. In addition, if a layer/element is "on" another layer/element in one orientation, then that layer/element may be "under" the other layer/element when the orientation is reversed.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the utility model discloses realize coal-fired generating set vapour gas water system of supplying more, including boiler 1, high-pressure cylinder 2, intermediate pressure jar 3, low pressure jar 4, low temperature multiple-effect sea water desalination device 14 and backpressure steam turbine 11, the pivot coaxial coupling of high-pressure cylinder 2, intermediate pressure jar 3 and low pressure jar 4 drives generator 5 electricity generation jointly. The exhaust steam of the boiler 1 is conveyed to the high-pressure cylinder 2 to do work; after exhaust steam of the high-pressure cylinder 2 is reheated by the boiler 1, one part of the exhaust steam is transmitted to the intermediate-pressure cylinder 3 to do work, and the other part of the exhaust steam is transmitted to the back pressure turbine 11, the temperature and pressure reducer 17 and is output as industrial steam as main machine hot re-extraction steam; the exhaust steam of the intermediate pressure cylinder 3 is conveyed to the low pressure cylinder 4 to do work; the exhaust steam of the low pressure cylinder 4 is heated by a water supply system with a condenser 6 and then flows back to the boiler 1 to form exhaust steam circulation; the steam exhaust of the back pressure turbine 11 is output as industrial steam, and the working exhaust is conveyed to the temperature and pressure reducing device 17; an output shaft of the back pressure turbine 11 is connected with an air compressor 12. The hot re-extraction steam of the main engine is output as part of exhaust steam of the industrial steam through a second valve group 19 and a fourth valve group 21; a part of the exhaust steam is sent to the back pressure turbine 11 through the third valve group 20; a part of the exhaust steam is supplied to the temperature and pressure reducing device 17 through the second valve group 19 and the fifth valve group 22.
The inlet of the low-temperature multi-effect seawater desalination device 14 is connected with an original seawater water taking pump 13, and the outlet is connected with a fresh water delivery pump 15; the fresh water delivery pump 15 pressurizes and outputs the desalinated seawater, one part of the desalinated seawater is output as finished water, one part of the desalinated seawater is consumed by the coal-fired unit and delivered to a water supply system, and the last part of the desalinated seawater is delivered to a temperature-reducing pressure reducer 17 as temperature-reducing water; the water supply system comprises a condenser 6, a condensate pump 7, a low-pressure heater group 8, a water supply pump 9 and a high-pressure heater group 10 which are connected in sequence; the inlet of the condenser 6 is connected with the exhaust steam of the low-pressure cylinder 4; a fresh water delivery pump 15 pressurizes and delivers a part of desalinated seawater to an inlet pipeline of the condensate pump 7; the outlet of the high-pressure heater group 10 is connected to the boiler 1. The fresh water delivery pump 15 is connected with the temperature and pressure reducing device 17 through a first valve group. The low-temperature multi-effect seawater desalination device 14 is connected with a water ring vacuum pump set 16 for pumping out non-condensable gas. A seventh valve group 24 is arranged at the acting steam exhaust end of the backpressure steam turbine 11; an eighth valve group 25 is provided at the inlet of the intermediate cylinder 3.
The utility model discloses a theory of operation:
the new steam at the outlet of the boiler 1 sequentially passes through a high-pressure cylinder 2 of a steam turbine to do work and then returns to a reheater of the boiler 1 to be heated for a second time, and then is divided into two parts, one part of the new steam continuously enters an intermediate pressure cylinder 3 and a low-pressure cylinder 4 to do work to drive a generator 5 to generate electricity, the other part of the new steam enters a backpressure steam turbine 11 to do work to drive an air compressor 12 to produce high-pressure air and supply the high-pressure air to the outside, a rotating partition plate is arranged in the backpressure steam turbine 12 in a through-flow mode, the extracted steam is supplied with industrial steam outside, the backpressure steam turbine 11 exhausts the steam and reduces the temperature, then enters a low-temperature multi-effect seawater desalination device 14 to heat seawater supplied by an original seawater taking water pump 13, the produced finished. In order to maintain the operation vacuum of the seawater desalination device, a water ring vacuum pump set 16 is configured to pump out non-condensable gas. The condensed water of the seawater desalination device 14 and the industrial steam supply and make-up water enter the condenser 6 together, and the condensed water discharged from the low-pressure cylinder pass through the condensed water pump 7, the low-pressure heater group 8, the feed pump 9 and the high-pressure heater group 10 together and then enter the boiler to absorb heat, so that the system circulation is completed. In addition, the back pressure turbine dragging air compressor 12 is provided with a bypass system, the second valve group 19, the fourth valve group 21 and the fifth valve group 22 are closed in normal operation, when the back pressure turbine dragging air compressor 12 fails and stops running, the third valve group 20, the sixth valve group 23 and the seventh valve group 24 are closed, the second valve group 19, the fourth valve group 21 and the fifth valve group 22 are opened, the hot re-extraction steam is used for reducing temperature and pressure and externally supplying industrial steam and a seawater desalination device, and at the moment, a compressed air product is stopped to supply. When the hot re-extraction flow is increased, the thrust of the steam turbine needs to be balanced, the safety of the last two stages of blades of the high-pressure cylinder 2 is guaranteed, and the hot re-extraction pressure is maintained by the aid of the eighth valve group 25.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (7)
1. The utility model provides a system for realize coal-fired generating set vapour gas water allies oneself with confession which characterized in that includes:
the boiler (1), the exhaust steam of the boiler (1) is conveyed to the high-pressure cylinder (2) to do work;
the high-pressure steam cylinder (2) is used for reheating the exhaust steam of the high-pressure steam cylinder (2) by the boiler (1), one part of the exhaust steam is conveyed to the intermediate pressure steam cylinder (3) to do work, and the other part of the exhaust steam is used as host heat re-extraction steam and is conveyed to the backpressure steam turbine (11), the temperature and pressure reducer (17) and is output as industrial steam;
the exhaust steam of the intermediate pressure cylinder (3) is conveyed to the low pressure cylinder (4) to do work;
the low-pressure cylinder (4), the exhaust steam of the low-pressure cylinder (4) is heated by a water supply system with a condenser (6) and then flows back to the boiler (1) to form exhaust steam circulation;
the system comprises a low-temperature multi-effect seawater desalination device (14), wherein the inlet of the low-temperature multi-effect seawater desalination device (14) is connected with an original seawater water taking pump (13), and the outlet of the low-temperature multi-effect seawater desalination device is connected with a fresh water delivery pump (15); the fresh water delivery pump (15) pressurizes and outputs the desalinated seawater, one part of the desalinated seawater is output as finished water, one part of the desalinated seawater is consumed by the coal-fired unit and is delivered to a water supply system, and the last part of the desalinated seawater is delivered to a temperature and pressure reducing device (17) as temperature reducing water;
the steam exhaust of the back pressure turbine (11) is output as industrial steam, and the working exhaust is conveyed to the temperature and pressure reducing device (17); an output shaft of the backpressure steam turbine (11) is connected with an air compressor (12).
2. The system for realizing the multi-combined supply of the steam, the gas and the water of the coal-fired power generating unit according to claim 1, wherein the water supply system comprises a condenser (6), a condensate pump (7), a low-pressure heater group (8), a water supply pump (9) and a high-pressure heater group (10) which are connected in sequence; an inlet of the condenser (6) is connected with the exhaust steam of the low pressure cylinder (4); a fresh water delivery pump (15) pressurizes and delivers a part of desalinated seawater to an inlet pipeline of a condensate pump (7); the outlet of the high-pressure heater group (10) is connected with the boiler (1).
3. The system for realizing the multi-combined supply of the steam, the gas and the water of the coal-fired power generating unit according to claim 1, wherein the fresh water delivery pump (15) is connected with the temperature and pressure reducing device (17) through a first valve group.
4. The system for realizing the multi-combined supply of the steam, the gas and the water of the coal-fired power generating unit according to claim 1, wherein a water ring vacuum pump set (16) for pumping out non-condensable gas is connected to the low-temperature multi-effect seawater desalting plant (14).
5. The system for realizing the multi-combined supply of the steam, the gas and the water of the coal-fired generator set according to claim 1, wherein rotating shafts of the high pressure cylinder (2), the intermediate pressure cylinder (3) and the low pressure cylinder (4) are coaxially connected to drive a generator (5) to generate electricity.
6. The system for realizing the multi-combined supply of the steam, the gas and the water of the coal-fired generator set according to claim 1, wherein the main engine hot re-extraction steam is output as a part of exhaust steam of industrial steam through a second valve group (19) and a fourth valve group (21); -feeding a part of the exhaust steam to the back pressure turbine (11) through a third valve group (20); a part of the exhaust steam is conveyed to the temperature and pressure reducing device (17) through a second valve group (19) and a fifth valve group (22).
7. The system for realizing the multi-combined supply of the steam, the gas and the water of the coal-fired power generating set according to claim 1, wherein a seventh valve set (24) is arranged at the working exhaust end of the backpressure steam turbine (11); an eighth valve group (25) is arranged at the inlet of the intermediate pressure cylinder (3).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810263A (en) * | 2020-02-27 | 2020-10-23 | 西安西热节能技术有限公司 | System for realizing multi-combined supply of steam, gas and water of coal-fired generator set |
| CN113266440A (en) * | 2021-06-11 | 2021-08-17 | 兖矿鲁南化工有限公司 | Steam control system and method |
| CN113431653A (en) * | 2021-07-23 | 2021-09-24 | 山东丰源生物质发电股份公司 | Industrial steam equipment with first-stage steam extraction and external supply for steam turbine |
| CN115163230A (en) * | 2022-09-09 | 2022-10-11 | 山东核电有限公司 | Nuclear power unit seawater desalination system |
-
2020
- 2020-09-04 CN CN202021952013.6U patent/CN212389396U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810263A (en) * | 2020-02-27 | 2020-10-23 | 西安西热节能技术有限公司 | System for realizing multi-combined supply of steam, gas and water of coal-fired generator set |
| CN113266440A (en) * | 2021-06-11 | 2021-08-17 | 兖矿鲁南化工有限公司 | Steam control system and method |
| CN113431653A (en) * | 2021-07-23 | 2021-09-24 | 山东丰源生物质发电股份公司 | Industrial steam equipment with first-stage steam extraction and external supply for steam turbine |
| CN113431653B (en) * | 2021-07-23 | 2022-11-04 | 山东丰源生物质发电股份公司 | Industrial steam equipment with first-stage steam extraction and external supply for steam turbine |
| CN115163230A (en) * | 2022-09-09 | 2022-10-11 | 山东核电有限公司 | Nuclear power unit seawater desalination system |
| CN115163230B (en) * | 2022-09-09 | 2022-11-29 | 山东核电有限公司 | Nuclear power unit seawater desalination system |
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