CN219654781U - 9H-level dual-fuel combined cycle unit gas sealing water supply system - Google Patents
9H-level dual-fuel combined cycle unit gas sealing water supply system Download PDFInfo
- Publication number
- CN219654781U CN219654781U CN202320480750.8U CN202320480750U CN219654781U CN 219654781 U CN219654781 U CN 219654781U CN 202320480750 U CN202320480750 U CN 202320480750U CN 219654781 U CN219654781 U CN 219654781U
- Authority
- CN
- China
- Prior art keywords
- supply system
- water supply
- sealing water
- gas sealing
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 146
- 238000007789 sealing Methods 0.000 title claims abstract description 70
- 239000000446 fuel Substances 0.000 title claims abstract description 26
- 239000002737 fuel gas Substances 0.000 claims abstract description 39
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 239000000498 cooling water Substances 0.000 claims abstract description 10
- 230000001502 supplementing effect Effects 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 58
- 230000009977 dual effect Effects 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The 9H-level dual-fuel combined cycle unit fuel gas sealing water supply system comprises a sealing water supply system body, wherein the sealing water supply system body consists of a closed cooling water expansion water tank, a fuel gas sealing water supply system module and a fuel gas injection/water injection control module interface of the fuel gas sealing water supply system body are sequentially connected through pipelines, the closed cooling water expansion water tank is respectively connected with a closed water mother pipe and the fuel gas sealing water supply system module through water supplementing constant-pressure pipelines, the fuel gas sealing water is conveyed into the fuel gas sealing water supply system module for treatment, and the fuel gas sealing water is conveyed to the fuel gas injection/water injection control module interface of the fuel gas sealing water supply system module after pressurization.
Description
Technical Field
The utility model relates to the technical field of design of gas-steam combined cycle power stations, in particular to a 9H-level dual-fuel combined cycle unit gas sealing water supply system.
Background
The gas turbine is a sign of national industrial level and technical skill, develops the gas turbine industry and technology, and has great strategic significance for promoting national industrial structure adjustment and transformation and upgrading and improving economic development quality and benefit.
For a gas-steam combined cycle unit adopting natural gas and light diesel oil dual fuel, according to the requirements of certain type 9H grade gas turbine suppliers, when the gas turbine runs under the gas working condition, high-pressure desalted water is injected into a fuel/water injection system header pipe to serve as sealing water, so that the desalted water pressure in the fuel/water injection system is ensured to be higher than the gas pressure of a combustion chamber, and the water seal is established to prevent gas from leaking into the fuel/water injection system header pipe, so that the stability and safety of combustion are improved.
Therefore, a sealing water supply system is required to be designed, which can stably provide desalted water with the pressure of 2.3-2.64 MPa, and the flow rate can meet 1-2L/min.
Considering this demineralized water pressure range, we have the following options regarding the source of demineralized water:
(1) The condensate pipeline behind the condensate pump can provide desalted water in the pressure range by arranging a pressure reducing valve. However, the sealing water system can operate in a unit single-cycle mode or a combined cycle mode so as to ensure the stability and safety of combustion when the gas working condition operates, the condensed water pipeline is only put into operation in the combined cycle mode, the condensed water pipeline is not put into operation in the single-cycle mode, and sealing water can not be still provided in the single-cycle mode;
(2) The pressure of the demineralized water main pipe in the factory is about 0.3MPa to 0.9MPa, and the demineralized water in the pressure range can be provided by arranging a booster water pump. However, the demineralized water in the demineralized water main pipe of the factory is from a water-converting demineralized water pump, the demineralized water pump does not need to operate when the unit normally operates, and only needs to operate when the unit needs to supplement water, and the sealing water is required to continuously operate under the gas operation working condition, if the sealing water with the small flow rate of 1-2L/min is required to be provided, the demineralized water pump also needs to be started, the sealing water quantity is very small, and is greatly smaller than the design flow rate of the demineralized water pump, so that the operation is unstable;
(3) If the closed cooling water expansion tank is adopted to supplement water and fix pressure pipeline from the closed water pipe as the water source (the pressure is about 0.1MPa to 0.3 MPa) of the sealing water, the pressure-increasing water pump is arranged to provide desalted water in the pressure range, and the sealing water quantity is very small, only 1.44m is consumed every 24 hours 3 Demineralized water, whereas the closed expansion tank has 10m 3 Has enough time to buffer the demineralized water consumption and timely supplement the closed cooling water.
Therefore, the water supplementing constant-pressure pipeline from the closed cooling water expansion water tank to the closed water pipe is an ideal water source for the fuel gas sealing water. Therefore, a 9H-level dual-fuel combined cycle unit gas seal water supply system is designed.
Disclosure of Invention
The utility model provides a 9H-level dual-fuel combined cycle unit gas sealing water supply system which is simple in structure, convenient to use and stable in operation.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the 9H-level dual-fuel combined cycle unit fuel gas sealing water supply system comprises a sealing water supply system body, wherein the sealing water supply system body consists of a closed cooling water expansion water tank, a fuel gas sealing water supply system module and a fuel gas injection/water injection control module interface of the fuel gas sealing water supply system body are sequentially connected through pipelines, the closed cooling water expansion water tank is respectively connected with a closed water mother pipe and the fuel gas sealing water supply system module through water supplementing constant-pressure pipelines, the fuel gas sealing water is conveyed into the fuel gas sealing water supply system module for treatment, and the fuel gas sealing water is conveyed to the fuel gas injection/water injection control module interface of the fuel gas sealing water supply system module after pressurization.
As preferable: the gas sealing water supply system module of the gas turbine consists of two diaphragm pump branches connected in parallel, and each diaphragm pump branch is sequentially provided with a first inlet and outlet isolation valve, an inlet filter, a diaphragm pump, a second inlet and outlet isolation valve, an outlet pulse buffer and an outlet check valve, wherein the outlet pulse buffer is used for relieving liquid pressure pulse so as to ensure stable liquid conveying, the inlet filter is used for filtering solid particles, and the diaphragm pump is used for improving the pressure of desalted water under the condition of tiny flow.
As preferable: the two-way diaphragm pump branch is also connected with a branch pipe in parallel, the branch pipe is provided with a recirculation valve which is used for guaranteeing the minimum flow of the diaphragm valve, a closed water pipeline between the fuel gas sealing water supply system module and the fuel gas filling/water injection control module interface of the fuel gas sealing water supply system module of the fuel gas engine is provided with a back pressure regulating valve and a branch pipeline with a safety valve, wherein the recirculation valve is used for guaranteeing the minimum flow of the diaphragm valve, the back pressure regulating valve is used for keeping the pressure range required by the system and stabilizing the pressure range on a given value, and the safety valve is used for guaranteeing that the diaphragm pump is not damaged when the pipeline is overpressurized.
As preferable: the number of the fuel gas sealing water supply system modules of the fuel machine is two, each fuel gas sealing water supply system module of the fuel machine is connected with a fuel gas filling/water injection control module interface, each fuel gas sealing water supply system module of the fuel machine consists of two diaphragm pump branches which are connected in parallel, wherein one diaphragm pump branch is used for normal operation, and the other diaphragm pump branch is used for standby.
As preferable: the material of the overflow part of the diaphragm pump is SS316.
As preferable: the diaphragm valve outlet main pipe is also provided with a shockproof pressure gauge, an instrument pipe, accessories and the like. The 9H-level dual-fuel combined cycle unit gas sealing water supply system has the advantages of simple structure, convenience in use, stability in operation and the like, and the diaphragm pump branch in the gas sealing water supply system module of the gas turbine is operated once and is ready for operation, so that the overall service life can be prolonged, and the overall working efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
The utility model is further described below with reference to the drawings and specific examples, which are not intended to be limiting. As shown in fig. 1, the gas sealing water supply system of the 9H-level dual-fuel combined cycle unit comprises a sealing water supply system body, wherein the sealing water supply system body consists of a closed cooling water expansion water tank 1, a gas sealing water supply system module 4 of the gas turbine and a fuel injection/water injection control module interface 6 of the gas turbine, the sealing water expansion water tank 1 is sequentially connected with a closed water pipe 2 and the gas sealing water supply system module 4 of the gas turbine through a water supplementing constant-pressure pipeline 3, the gas sealing water is conveyed into the gas sealing water supply system module 4 of the gas turbine for treatment, and the gas sealing water is conveyed to the fuel injection/water injection control module interface 6 of the gas turbine after pressurization.
The gas sealing water supply system module of the gas turbine consists of two diaphragm pump branches 18 which are connected in parallel, wherein a first inlet and outlet isolation valve 9, an inlet filter 11, a diaphragm pump 8, a second inlet and outlet isolation valve 10, an outlet pulse buffer 12 and an outlet check valve 13 are sequentially arranged on each diaphragm pump branch, the outlet pulse buffer 12 is used for relieving liquid pressure pulse so as to ensure stable liquid conveying, the inlet filter 11 is used for filtering solid particles, and the diaphragm pump 8 is used for improving the pressure of the desalted water under the condition of small flow.
The two diaphragm pump branches 18 are also connected in parallel with a branch pipe 5, the branch pipe 5 is provided with a recirculation valve 14, the recirculation valve 14 is used for guaranteeing the minimum flow rate of the diaphragm valve, a closed water pipeline 17 between the fuel gas sealing water supply system module 4 and the fuel gas filling/water injection control module interface 6 of the fuel machine is provided with a back pressure regulating valve 15 and a branch pipeline 16 with a safety valve 19, the recirculation valve 14 is used for guaranteeing the minimum flow rate of the diaphragm valve, the back pressure regulating valve 15 is used for keeping the pressure range required by the system and stabilizing the pressure range at a given value, and the safety valve 19 is used for guaranteeing that the diaphragm pump is not damaged when the pipeline is overpressurized.
The number of the gas sealing water supply system modules 4 of the gas turbine is two, each gas sealing water supply system module 4 of the gas turbine is connected with a gas injection/water injection control module interface 6, each gas sealing water supply system module 4 of the gas turbine is composed of two diaphragm pump branches 18 connected in parallel, one diaphragm pump branch 18 is used for normal operation, and the other diaphragm pump branch 18 is used for standby.
The utility model has the advantages of simple structure, convenient use, stable operation and the like, and the diaphragm pump branch in the gas sealing water supply system module of the gas turbine can be transported and prepared at one time, thus the whole service life can be prolonged, and the whole working efficiency can be improved. The material of the flow-through part of the diaphragm pump 8 is SS316.
The diaphragm valve outlet main pipe is also provided with a shockproof pressure gauge, an instrument pipe, accessories and the like. Each gas engine fuel gas sealing water supply system is provided with an electric control cabinet, can provide signals such as system operation, stop, fault and the like for the power plant DCS control system, and can receive starting and stopping instructions of the power plant DCS control system.
The preferred embodiments of the present utility model are provided only to help illustrate the present utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof. The above disclosure is only a few specific embodiments of the present utility model, but the present utility model is not limited thereto, and any changes that can be thought by those skilled in the art should fall within the protection scope of the present utility model.
Claims (5)
1. The utility model provides a 9H level dual fuel combined cycle unit gas seal water supply system, includes seal water supply system body, its characterized in that: the sealing water supply system body is composed of a closed cooling water expansion water tank (1), a gas sealing water supply system module (4) of the gas turbine and an oiling/water injection control module interface (6) of the gas turbine, the closed cooling water expansion water tank (1) is connected with a closed water main pipe (2) and the gas sealing water supply system module (4) of the gas turbine respectively through water supplementing and constant pressure pipelines (3), the gas sealing water is conveyed into the gas sealing water supply system module (4) of the gas turbine for treatment, and the gas sealing water is conveyed to the oiling/water injection control module interface (6) of the gas turbine after pressurization.
2. The 9H stage dual fuel combined cycle unit gas seal water supply system of claim 1, wherein: the gas sealing water supply system module of the gas turbine consists of two diaphragm pump branches (18) which are connected in parallel, wherein a first inlet and outlet isolation valve (9), an inlet filter (11), a diaphragm pump (8), a second inlet and outlet isolation valve (10), an outlet pulse buffer (12) and an outlet check valve (13) are sequentially arranged on each diaphragm pump branch, the outlet pulse buffer (12) is used for relieving liquid pressure pulse so as to ensure stable liquid conveying, the inlet filter (11) is used for filtering solid particles, and the diaphragm pump (8) is used for improving the pressure of desalted water under the condition of tiny flow.
3. The 9H stage dual fuel combined cycle unit gas seal water supply system of claim 2, wherein: the two-way diaphragm pump branch (18) is also connected with a branch pipe (5) in parallel, the branch pipe (5) is provided with a recirculation valve (14), the recirculation valve (14) is used for guaranteeing the minimum flow rate of the diaphragm valve, a closed water pipeline (17) between the fuel gas sealing water supply system module (4) and the fuel gas filling/water injection control module interface (6) of the fuel gas sealing water supply system module is provided with a back pressure regulating valve (15) and a branch pipe (16) with a safety valve (19), wherein the recirculation valve (14) is used for guaranteeing the minimum flow rate of the diaphragm valve, the back pressure regulating valve (15) is used for keeping the required pressure range of the system and stabilizing the pressure range on a given value, and the safety valve (19) is used for guaranteeing that the diaphragm pump is not damaged when the pipeline is overpressurized.
4. The 9H stage dual fuel combined cycle unit gas seal water supply system of claim 2, wherein: the number of the fuel gas sealing water supply system modules (4) of the fuel machine is two, each fuel gas sealing water supply system module (4) is connected with a fuel gas oiling/water injection control module interface (6), each fuel gas sealing water supply system module (4) of the fuel machine is composed of two diaphragm pump branches (18) which are connected in parallel, one diaphragm pump branch (18) is used for normal operation, and the other diaphragm pump branch (18) is used for standby.
5. The 9H stage dual fuel combined cycle unit gas seal water supply system of claim 2, wherein: the material of the flow-through part of the diaphragm pump (8) is SS316.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320480750.8U CN219654781U (en) | 2023-03-14 | 2023-03-14 | 9H-level dual-fuel combined cycle unit gas sealing water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320480750.8U CN219654781U (en) | 2023-03-14 | 2023-03-14 | 9H-level dual-fuel combined cycle unit gas sealing water supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219654781U true CN219654781U (en) | 2023-09-08 |
Family
ID=87856662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320480750.8U Active CN219654781U (en) | 2023-03-14 | 2023-03-14 | 9H-level dual-fuel combined cycle unit gas sealing water supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219654781U (en) |
-
2023
- 2023-03-14 CN CN202320480750.8U patent/CN219654781U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112727604A (en) | Liquid/gas dual fuel supply system for gas turbine | |
| CN102230569A (en) | Liquefied natural gas storage system, gas filling device and gas supply device for engine | |
| CN104165266B (en) | A kind of pressure reduction formula liquefied natural gas filling station adds injection system and method thereof | |
| CN104088726A (en) | Novel vehicle-mounted natural gas supply system and stable gas supply method thereof | |
| CN219654781U (en) | 9H-level dual-fuel combined cycle unit gas sealing water supply system | |
| JP2016502102A (en) | Boiling water reactor start / stop hydrogen injection system and method | |
| CN109166638B (en) | Coolant hydrogenation system and method for small stack | |
| CN103591431A (en) | Outer circulation oil lubricating device for bearings of water-turbine generator sets | |
| CN210344994U (en) | Continuous stable oxygen system | |
| CN110725667B (en) | LNG well-flushing paraffin removal vehicle | |
| CN203939594U (en) | A kind of novel on-vehicle natural gas supply system | |
| CN210372863U (en) | LNG stores up station and utilizes high-pressure gas to unload car turbocharging system | |
| CN210179314U (en) | Marine LNG gas supply system | |
| CN208253191U (en) | A kind of liquefied natural gas liquid-supplying system | |
| CN101122223B (en) | Offshore platform rich natural gas re-injection system | |
| CN218293999U (en) | Oil supply device for coal-fired unit | |
| CN112944804A (en) | Method for supplying oxygen and nitrogen with small flow for air separation device | |
| CN102705701A (en) | Gas supply device for engine | |
| CN105298950A (en) | Fuel oil supply device with double pressurization oil tanks | |
| CN213685011U (en) | LNG receiving station sea water pump bearing cooling water system | |
| CN220269138U (en) | Nitrogen system for chemical industry | |
| CN213237490U (en) | Multi-fuel steam injection boiler system suitable for offshore heavy oil development | |
| CN219263970U (en) | LNG air feeder | |
| CN108278493B (en) | Natural gas oxygen pipeline network cooperative control management system | |
| CN217501824U (en) | Pressurization gas supply system for vehicle liquefied natural gas cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |