CN114321725A - High-pressure closed high-temperature circulating water supply device - Google Patents
High-pressure closed high-temperature circulating water supply device Download PDFInfo
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- CN114321725A CN114321725A CN202111519312.XA CN202111519312A CN114321725A CN 114321725 A CN114321725 A CN 114321725A CN 202111519312 A CN202111519312 A CN 202111519312A CN 114321725 A CN114321725 A CN 114321725A
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Abstract
The invention provides a high-pressure closed high-temperature circulating water supply device, wherein nitrogen is filled into a high-temperature water tank to pressurize to generate high-temperature water, a high-pressure water pump is arranged on a pipeline behind a water outlet of the high-temperature water tank to maintain high pressure on the high-temperature water, a back pressure adjustable valve is arranged at an outlet of a cooler of a circulating water return pipeline, and circulating water in a sampling rake pipeline between the high-pressure water pump and the back pressure adjustable valve is kept to be always high in pressure and adjustable in pressure; a cooler is arranged on the circulating water return pipeline, so that circulating water with increased temperature after passing through a sampling rake of the gas analysis system is reduced, and the whole system can operate for a long time; the high-temperature water tank and the heating element do not bear high pressure, so that the equipment cost can be reduced, the high-temperature water pressure of the sampling rake pipeline is high, the sampling rake pipeline can run continuously for a long time, and the special use requirements of the flue gas measurement and analysis system of the gas turbine and the aircraft engine test equipment are met.
Description
Technical Field
The invention belongs to the technical field of high-temperature circulating water supply, and particularly relates to a high-pressure closed high-temperature circulating water supply device.
Background
With the increasing requirements on emissions for environmental protection and seaworthiness, the requirements on emissions from ground gas turbines and aircraft engines are increasing. In the process of developing the ground gas turbine and the aircraft engine, the pollution emission of the combustion chamber components of the ground gas turbine and the aircraft engine needs to be tested and analyzed on test equipment to guide the design work of the combustion chamber components.
The test equipment of the combustor part adopts a flue gas measurement and analysis system to test and analyze the pollution emission and adopts a sampling rake to sample the exhaust gas. In order to obtain a test result with high reliability, a flue gas measurement and analysis system and a sampling rake of the test equipment are required to be consistent with the requirements of national and international pollutant emission test standard specifications as much as possible. The pollutant emission test standard requires that the temperature of the sample gas is near 160 ℃, the flue gas measurement and analysis system is arranged outside the combustion chamber part, and a sample gas heat preservation device can be arranged to meet the temperature requirement of the sample gas. For a typical F-grade ground gas turbine and a 10-ton thrust-grade aircraft engine, the temperature of high-temperature flue gas at the outlet of a combustion chamber can reach 1400 ℃ or even higher, a sampling rake needs to be cooled to avoid burning out of the high-temperature flue gas, and meanwhile, the temperature of the taken high-temperature sample gas needs to be reduced to about 160 ℃.
At present, in a conventional cooling system, the sampling rake is cooled by normal-temperature water, so that the sampling rake can not be ablated, but the situation that high-temperature sample gas in the sampling rake is reduced to about 160 ℃ and is reliably stabilized cannot be guaranteed, and the reliability of the final result of flue gas test analysis is low.
Disclosure of Invention
The invention provides a high-pressure closed high-temperature circulating water supply device, which solves the problem that the final result of flue gas test analysis is not high in reliability due to unstable temperature when a conventional cooling system cools a sampling rake by adopting normal-temperature water.
The invention provides a high-pressure closed high-temperature circulating water supply device, which comprises: the high-temperature water tank 1, the electric heater 21, the high-pressure water pump 2, the overflow valve 3, the cooler 7 and the cooler back backpressure valve 8;
a high-temperature water outlet, a high-temperature water return port, a nitrogen injection port and a primary water injection port are reserved on the high-temperature water tank 1; the nitrogen injection port is used for injecting nitrogen and pressurizing the pressure in the high-temperature water tank 1 to a first preset pressure; the electric heater 21 is arranged in the high-temperature water tank 1 and is used for heating normal-temperature water injected through the primary water injection port to a first preset temperature before the device is started;
a high-temperature water outlet of the high-temperature water tank 1 is connected with a water inlet of the high-pressure water pump 2, the high-pressure water pump 2 is used for pressurizing high-temperature water to a second preset pressure, and the second preset pressure is greater than the first preset pressure and meets the pressure requirement of a sampling position of the sampling rake 6;
one of the two water outlets of the high-pressure water pump 2 is connected with an overflow pipeline, pressurized high-temperature water flows back to the high-temperature water tank 1, and the other water outlet of the high-pressure water pump is connected with a circulating pipeline which comprises a water jacket and a cooler 7 which are sleeved on the sampling rake 6; the overflow pipeline is provided with the overflow valve 3 which is used for adjusting the water supply pressure of the high-pressure water pump 2 to the sampling rake 6; the cooler 7 is connected with a high-temperature water return port of the high-temperature water tank 1 through a cooler back pressure valve 8; the cooler back pressure valve 8 is used for keeping the pressure of the circulating pipeline to reach a second preset pressure.
Optionally, the first preset pressure is 0.4MPa, and the second preset pressure is 2.5-3.5 MPa.
Optionally, the cooler 7 is configured to cool the high-temperature water flowing out of the water jacket to a first preset temperature.
Optionally, the first preset temperature is 120 ℃ to 160 ℃.
Optionally, a liquid level meter 23 is arranged at the top of the high-temperature water tank 1 and used for monitoring the liquid level.
Optionally, the method further includes: a flow meter 4 and a regulating valve 5;
the flow meter 4 and the regulating valve 5 are installed on the circulation line for metering and regulating the high temperature water supplied to the water jacket on the sampling rake 6.
Optionally, a gas release safety valve 22 is arranged at the top of the high-temperature water tank 1 to prevent overpressure, and gas discharged by the safety valve is led to a safety valve gas release path 13.
Optionally, the low temperature side of the cooler 7 receives normal temperature water.
The invention provides a high-pressure closed high-temperature circulating water supply device.A high-temperature water tank is filled with nitrogen and pressurized to generate 120-160 ℃ high-temperature water, a variable water expansion space is created by utilizing the compressible characteristic of inert gas, the inert gas can absorb the volume expansion of the water when the water temperature changes, and the problem of unstable water pressure caused by a fixed expansion space is avoided; a high-pressure water pump is arranged on a pipeline behind a water outlet of the high-temperature water tank to add high pressure to high-temperature water, a back pressure adjustable valve is arranged at an outlet of a cooler of a circulating water return pipeline, and circulating water in a sampling rake pipeline between the high-pressure water pump and the back pressure adjustable valve is kept to be always high in pressure and adjustable in pressure; a cooler is arranged on the circulating water return pipeline, so that circulating water with increased temperature after passing through a sampling rake of the gas analysis system is reduced, and the whole system can operate for a long time; the high-pressure closed high-temperature circulating water supply device provided by the invention has the advantages that the structure is simple, the control principle is simple, the high-temperature water tank and the heating element do not bear high pressure, the equipment cost can be reduced, the high-temperature water pressure of the sampling rake pipeline is high (2.5-3.5MPa), the sampling rake can continuously run for a long time, and the special use requirements of a flue gas measurement and analysis system of gas turbine and aeroengine test equipment are met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a high-pressure closed high-temperature circulating water supply device according to the present invention;
FIG. 2 is a schematic view of the high temperature water tank of the present invention;
description of reference numerals:
1-high temperature water tank;
2-a high pressure water pump;
3-an overflow valve;
4-a flow meter;
5-adjusting the valve;
6-sampling rake;
7-a cooler;
8-a back backpressure valve of the cooler;
9-primary water injection path switching valve;
10-nitrogen gas injection way switch valve;
11-nitrogen gas circuit;
12-normal temperature waterway;
13-safety valve gas release circuit;
21-an electric heater;
22-a relief valve;
23-liquid level meter.
Detailed Description
The high-pressure closed high-temperature circulating water supply device provided by the invention is explained below with reference to the accompanying drawings.
Referring to the attached drawings 1-2, the invention provides a high-pressure closed high-temperature circulating water supply device, which generates high-temperature water at 120-160 ℃ by pressurizing a high-temperature water tank by adopting nitrogen; a high-temperature high-pressure water pump is arranged behind a water outlet of the water tank, an adjustable back pressure valve is arranged in front of a water return port of the water tank, high pressure of high-temperature water in a sampling rake pipeline is maintained, and test requirements are met. The whole system can continuously provide 120-160 ℃ high-temperature and high-pressure water, has the characteristics of simple system structure, simple control principle, small volume of a high-temperature water tank, adjustable high-temperature water pressure and the like, and meets the use requirements of a flue gas measurement and analysis system of gas turbine and aeroengine test equipment.
The invention provides a high-pressure closed high-temperature circulating water supply device, which comprises:
the equipment comprises a high-temperature circulating water path, a high-temperature water tank 1, a pressure safety valve, a high-temperature water outlet pipeline, a high-pressure water pump 2, an overflow valve 3, a flowmeter 4, an adjusting valve 5, a cooler 7, a cooler back backpressure valve 8 and a water return pipeline;
the nitrogen injection path is provided with a nitrogen injection path switch valve 10 and a nitrogen inlet pipeline;
the primary water injection path is provided with a primary water injection path switch valve 9 and a water injection pipeline.
An electric heater 21 is arranged in the high-temperature water tank 1 and used for heating the low-temperature liquid water in the high-temperature water tank 1 before the device is started, and heating the water to 120-160 ℃.
The top of the high-temperature water tank 1 is provided with an air relief valve 22 for preventing overpressure, the air relief valve 22 exhausts air to lead to a relief valve air relief path 13, and the top of the high-temperature water tank 1 is also provided with a liquid level meter 23 for monitoring the liquid level height, so that the liquid level height is ensured to be within a safety range, and the high-temperature water tank is ensured to be safe and reliable.
As shown in fig. 2, a high-temperature water outlet, a high-temperature water return port, a nitrogen gas injection port, and a primary water injection port are reserved in the high-temperature water tank 1. The high temperature water tank 1 is connected with a water outlet pipe through a high temperature water outlet, is connected with a water return pipe through a high temperature water return port, is connected with a primary water injection pipe through a primary water injection port, and is connected with a nitrogen pipe through a nitrogen injection port, preferably, the pressure in the water tank reaches a first preset pressure (for example, 0.4-0.6MPa after nitrogen is filled, and the high temperature water is still liquid water at 160 ℃.
Nitrogen is filled into the high-temperature water tank to pressurize to generate 120-160 ℃ high-temperature water, a variable water expansion space is created by utilizing the compressible characteristic of inert gas, the inert gas can absorb the volume expansion of water when the water temperature changes, and the problem of unstable water pressure caused by the fixed expansion space is avoided.
The water outlet pipeline of the high-temperature water tank 1 is connected with the high-pressure water pump 2, the high-pressure water pump 2 can resist the temperature of more than 200 ℃, and the high-pressure water pump 2 pressurizes the high-temperature water to 2.5-3.5MPa and then conveys the high-temperature water to a downstream pipeline.
Considering that the sampling rake 6 is directly inserted into the outlet of the combustion chamber component for sampling, because the exhaust pressure of the outlet of the combustion chamber is very high and reaches a second preset pressure (generally 2.5-3.5MPa), and the water jacket of the sampling rake 6 is very thin (generally 2-3mm thick) in order to strengthen heat exchange, the invention controls the sample gas at the inner side of the inner wall of the water jacket of the sampling rake and the circulating water pressure at the outer side to be at a same level as much as possible, so that the inner wall mainly bears temperature load and less stress load, protects the water jacket, and simultaneously, only the pressure of the circulating water path is increased, thereby avoiding the pressure in the high-temperature water tank 1 from being increased too high, simplifying the structure and improving the safety of the device.
The pipeline at the downstream of the high-pressure water pump is divided into two parts, one branch is connected with the high-temperature water tank through an overflow valve and is used for adjusting the pressure and the flow of the pipeline, and the other branch is sequentially connected with a flowmeter and a flow adjusting valve through the pipeline and is used for metering and adjusting the flow of the high-temperature water entering the sampling rake.
After metering and adjusting, high-temperature water with required flow enters the sampling rake water jacket to perform recuperative heat exchange with the sampled flue gas, so that the temperature is increased.
The high-temperature water with the increased temperature after the sampling rake enters a cooler, the temperature is reduced to 120-160 ℃, and the cooler can be a shell-and-tube heat exchanger, a plate heat exchanger, an air cooling heat exchanger and the like.
A back pressure adjustable valve is arranged behind the water outlet of the cooler to suppress pressure, and the back pressure adjustable valve is matched with a front high-pressure water pump to maintain the high pressure of high-temperature water in a sampling rake pipeline, so that the test requirement is met. The adjustable valve should be a valve capable of bearing a large pressure difference, preferably a single-seat valve, so as to keep the pressure of the front pipeline at a high pressure all the time and ensure that the pressure of the front pipeline is flexibly adjustable.
The circulating water backwater cooled by the cooler 7 and depressurized by the back pressure valve 8 of the cooler finally returns to the high-temperature water tank through the backwater pipeline to complete high-temperature water circulation.
The switch valve is arranged on the primary water injection pipeline, and a proper amount of pure water is injected into the water tank at the beginning, so that water injection is not needed in the normal working process of the high-pressure closed high-temperature circulating water supply device.
Fig. 1 is a schematic diagram of the high-pressure closed high-temperature circulating water supply apparatus according to the present invention, wherein water is taken from a normal-temperature water path 12 (the injected water is treated soft water), and is injected into a high-temperature water tank 1 through a primary water injection path switching valve 9. Nitrogen is filled through a nitrogen gas path 11 and a nitrogen gas injection path switching valve 10, and the high-temperature water tank 1 is pressurized to 0.4 MPa. Before the test, the injected water at normal temperature was heated to 120 ℃ to 160 ℃ by the electric heater 21.
The high-temperature water circulation flow is as follows: the water outlet of the high-temperature water tank 1 is connected with a high-pressure water pump 2 through a pipeline, and the high-temperature circulating water is pressurized to the pressure required by the sampling rake 6 through the high-pressure water pump 2. The high-temperature water pipeline behind the high-pressure water pump 2 is divided into two parts, one part adjusts the water supply pressure of the sampling rake 6 through an overflow valve 3 on the overflow pipeline, finally, overflow water flows back to the high-temperature water tank 1, and the other part supplies the water to the sampling rake 6 through the metering and adjustment of a flowmeter 4 and an adjusting valve 5. Before high-temperature water flowing out of the sampling rake water jacket 6 flows back to the high-temperature water tank 1, the temperature is reduced to 120-160 ℃ through the cooler 7, a cooler back pressure valve 8 is arranged at the water outlet of the cooler 7, and the pressure of a front pipeline is kept to be high all the time. After being cooled by the cooler 7 and regulated by the back pressure valve 8 of the cooler, the pressure of the circulating water is reduced, and the return water finally returns to the high-temperature water tank 1 through the return water pipeline to finish high-temperature water circulation.
Claims (8)
1. A high-pressure closed high-temperature circulating water supply device is characterized by comprising: the device comprises a high-temperature water tank (1), an electric heater (21), a high-pressure water pump (2), an overflow valve (3), a cooler (7) and a back backpressure valve (8) of the cooler;
a high-temperature water outlet, a high-temperature water return port, a nitrogen injection port and a primary water injection port are reserved on the high-temperature water tank (1); the nitrogen injection port is used for injecting nitrogen and pressurizing the pressure in the high-temperature water tank (1) to a first preset pressure; the electric heater (21) is arranged in the high-temperature water tank (1) and is used for heating normal-temperature water injected through the primary water injection port to a first preset temperature before the device is started;
a high-temperature water outlet of the high-temperature water tank (1) is connected with a water inlet of the high-pressure water pump (2), the high-pressure water pump (2) is used for pressurizing high-temperature water to a second preset pressure, and the second preset pressure is greater than the first preset pressure and meets the pressure requirement of a sampling position of the sampling rake (6);
one of the two water outlets of the high-pressure water pump (2) is connected with an overflow pipeline, pressurized high-temperature water flows back into the high-temperature water tank (1), the other water outlet of the high-pressure water pump is connected with a circulating pipeline, and the circulating pipeline comprises a water jacket and a cooler (7) which are sleeved on the sampling rake (6); the overflow valve (3) is arranged on the overflow pipeline and is used for adjusting the water supply pressure of the high-pressure water pump (2) to the sampling rake (6); the cooler (7) is connected with a high-temperature water return port of the high-temperature water tank (1) through a cooler back backpressure valve (8); and the cooler back pressure valve (8) is used for keeping the pressure of the circulating pipeline to reach a second preset pressure.
2. The apparatus according to claim 1, wherein the first predetermined pressure is 0.4MPa and the second predetermined pressure is 2.5-3.5 MPa.
3. The device according to claim 1, characterized in that the cooler (7) is adapted to cool the hot water flowing out of the water jacket to a first predetermined temperature.
4. The apparatus according to claim 1, wherein the first preset temperature is 120-160 ℃.
5. The device according to claim 1, characterized in that a level gauge (23) is arranged at the top of the hot water tank (1) for monitoring the liquid level.
6. The apparatus of claim 1, further comprising: a flow meter (4) and a regulating valve (5);
the flow meter (4) and the regulating valve (5) are arranged on the circulating pipeline and used for metering and regulating the high-temperature water supplied to the water jacket on the sampling rake (6).
7. The device according to claim 1, characterized in that the top of the high temperature water tank (1) is provided with a relief valve (22) for preventing overpressure, and the relief valve exhaust gas is led to a relief valve exhaust gas path (13).
8. The device according to claim 1, characterized in that the low temperature side of the cooler (7) receives normal temperature water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111519312.XA CN114321725A (en) | 2021-12-13 | 2021-12-13 | High-pressure closed high-temperature circulating water supply device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111519312.XA CN114321725A (en) | 2021-12-13 | 2021-12-13 | High-pressure closed high-temperature circulating water supply device |
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| CN202111519312.XA Pending CN114321725A (en) | 2021-12-13 | 2021-12-13 | High-pressure closed high-temperature circulating water supply device |
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|---|---|---|---|---|
| GB8418817D0 (en) * | 1984-07-24 | 1984-08-30 | Secr Defence | Combustion gas sampler and conditioner |
| CN106284519A (en) * | 2016-08-17 | 2017-01-04 | 中国科学院等离子体物理研究所 | A kind of constant temperature circulating water system |
| CN206221115U (en) * | 2016-09-30 | 2017-06-06 | 中航商用航空发动机有限责任公司 | The feeding pressure stabilizing device of aircraft engine test stand fuel service system |
| CN206638420U (en) * | 2017-04-12 | 2017-11-14 | 辽宁工业大学 | A kind of cooler for recycled exhaust gas experimental rig |
| CN107945896A (en) * | 2017-11-10 | 2018-04-20 | 中国科学院近代物理研究所 | A kind of application method of high temperature and pressure water flow bulk effect simulator |
| CN110345367A (en) * | 2019-07-09 | 2019-10-18 | 中国航发哈尔滨东安发动机有限公司 | A kind of lubricating oil pumping plant charge oil pressure and oil temperature supplying complex automatic control system |
| CN111579410A (en) * | 2020-05-14 | 2020-08-25 | 北京航空航天大学 | Ceramic matrix composite gas environment fatigue test system |
| CN213301679U (en) * | 2020-05-06 | 2021-05-28 | 湖南汉能科技有限公司 | Cooling water system for test bed of aero-engine combustion chamber |
| CN214121680U (en) * | 2020-12-30 | 2021-09-03 | 中国航发商用航空发动机有限责任公司 | Sampling device and aeroengine fuel sampling equipment |
-
2021
- 2021-12-13 CN CN202111519312.XA patent/CN114321725A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8418817D0 (en) * | 1984-07-24 | 1984-08-30 | Secr Defence | Combustion gas sampler and conditioner |
| CN106284519A (en) * | 2016-08-17 | 2017-01-04 | 中国科学院等离子体物理研究所 | A kind of constant temperature circulating water system |
| CN206221115U (en) * | 2016-09-30 | 2017-06-06 | 中航商用航空发动机有限责任公司 | The feeding pressure stabilizing device of aircraft engine test stand fuel service system |
| CN206638420U (en) * | 2017-04-12 | 2017-11-14 | 辽宁工业大学 | A kind of cooler for recycled exhaust gas experimental rig |
| CN107945896A (en) * | 2017-11-10 | 2018-04-20 | 中国科学院近代物理研究所 | A kind of application method of high temperature and pressure water flow bulk effect simulator |
| CN110345367A (en) * | 2019-07-09 | 2019-10-18 | 中国航发哈尔滨东安发动机有限公司 | A kind of lubricating oil pumping plant charge oil pressure and oil temperature supplying complex automatic control system |
| CN213301679U (en) * | 2020-05-06 | 2021-05-28 | 湖南汉能科技有限公司 | Cooling water system for test bed of aero-engine combustion chamber |
| CN111579410A (en) * | 2020-05-14 | 2020-08-25 | 北京航空航天大学 | Ceramic matrix composite gas environment fatigue test system |
| CN214121680U (en) * | 2020-12-30 | 2021-09-03 | 中国航发商用航空发动机有限责任公司 | Sampling device and aeroengine fuel sampling equipment |
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