Air inlet channel water injection cooling device and air compressor
By installing a water spray cooling device at the compressor inlet, the problem of insufficient load of CCPP units in high-temperature environments was solved, achieving efficient and stable operation of the units and improving power generation efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA BAOGANGXIN ENERGY CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-14
Smart Images
Figure CN224496671U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of air intake cooling devices, and in particular to an air intake water spray cooling device and an air compressor. Background Technology
[0002] Combined cycle gas-steam (CCPP) is a combined cycle technology that uses blast furnace gas and coke oven gas to generate electricity, and is mainly used in the field of waste energy recovery in the steel industry.
[0003] CCPP units are subject to the following controls under different operating conditions (start-up, load increases / decreases, and stable operation under load): governor control, load limiter control, flue gas temperature control, fuel over-limit control, speed over-limit control, and GC surge limit control. Specifically, under stable operation under load, the units are controlled by the load limiter, flue gas temperature control, and fuel over-limit control. When gas is readily available, the set load (rated load) increases with ambient temperature, and the temperatures of the combustion gas and air also rise synchronously. As the gas temperature increases, its density decreases, and the oxygen content in the air also decreases. Consequently, the actual load of the CCPP unit will be lower than the set load, severely limiting the unit's load capacity and power generation efficiency. Utility Model Content
[0004] To solve the above-mentioned technical problems, this application provides an air intake duct water spray cooling device.
[0005] The technical solution provided by this utility model is as follows:
[0006] An air intake duct water spray cooling device includes a water supply assembly and a water spray assembly. The water supply assembly includes a water supply pipeline; one end of the water supply pipeline is connected to a water source, and the other end supplies water to the water spray assembly. The water spray assembly includes a main pipe, a first to twelfth nozzle group, a first to twelfth manifold, a first connecting pipe, and a second connecting pipe. One end of the main pipe is connected to the water supply pipeline, and the other end is connected to the first connecting pipe and the second connecting pipe, respectively. The first to twelfth manifolds are each individually controlled by a control valve. The end of the first connecting pipe furthest from the main pipe is connected to the first to eighth manifolds, respectively. The first connecting pipe is equipped with a first inlet valve and a second inlet valve. A water pump; the first water pump is used to pump water to the first to eighth manifolds; the first inlet valve is located upstream of the first water pump and is used to control the opening and closing of the first connecting pipe; the end of the second connecting pipe away from the main pipe is connected to the ninth to twelfth manifolds respectively; a second inlet valve and a second water pump are provided on the second connecting pipe; the second water pump is used to pump water to the ninth to twelfth manifolds; the second inlet valve is located upstream of the second water pump and is used to control the opening and closing of the second connecting pipe; the first to twelfth nozzle groups are respectively installed on the first to twelfth manifolds and located inside the compressor inlet, for spraying water into the compressor inlet.
[0007] Optionally, the first nozzle group includes twenty-eight nozzles; the second nozzle group includes twenty-seven nozzles; the third nozzle group includes twenty-seven nozzles; the fourth nozzle group includes twenty-eight nozzles; the fifth nozzle group includes twenty-eight nozzles; the sixth nozzle group includes twenty-seven nozzles; the seventh nozzle group includes twenty-seven nozzles; and the eighth nozzle group includes twenty-eight nozzles.
[0008] Optionally, each of the ninth to twelfth nozzle groups contains fifty-five nozzles.
[0009] Optionally, the water supply assembly further includes a weather station and a controller; the controller is communicatively connected to the weather station and the control valves of the first to twelfth manifolds; the weather station is used to control the on / off state of the control valves of the first to twelfth manifolds according to the meteorological conditions of the air intake water spray cooling device.
[0010] Optionally, the water supply assembly further includes a cartridge filter and a water spray pump assembly; the water spray pump assembly is disposed on the water supply pipeline; the cartridge filter is disposed on the water supply pipeline and located upstream of the water spray pump assembly, for removing impurities from the water.
[0011] Optionally, a first drain valve is provided on the first connecting pipe, and the first drain valve is located between the first water pump and the first to eighth manifolds; a second drain valve is provided on the second connecting pipe, and the second drain valve is located between the second water pump and the ninth to twelfth manifolds.
[0012] Optionally, a nitrogen pipeline is connected to the main pipe; the nitrogen pipeline is used to inject nitrogen into the main pipe; the nitrogen enters from the main pipe and exits from each nozzle.
[0013] Optionally, an inlet filter is provided on the main pipe; the inlet filter is located downstream of the inlet valve.
[0014] Based on the above concept, this utility model also provides an air compressor, wherein the air inlet of the air compressor is provided with the aforementioned air inlet water spray cooling device.
[0015] As described above, the air intake water spray cooling device of this utility model has at least the following beneficial effects:
[0016] 1. The intake water spray cooling device of this utility model reduces the air temperature at the compressor inlet of the CCPP unit by spraying water to cool the compressor, increases the air humidity, and improves the problem that when the ambient temperature rises, the temperature of the combustion gas and the air rise simultaneously, resulting in a decrease in gas density and oxygen content in the air, which in turn leads to the actual load of the CCPP unit being lower than the set load. This is conducive to the efficient and stable operation of the CCPP unit.
[0017] 2. This utility model has a compact and simple structure, is easy to operate and maintain, is applicable to various similar units, helps to reduce equipment investment and operating costs, and has great potential for promotion and utilization. Attached Figure Description
[0018] Figure 1 This is a flowchart used to illustrate the structure of the water spray assembly.
[0019] Reference numerals: 1. Main valve; 2. Inlet filter; 3. Nitrogen pipeline; 4. First inlet valve; 5. First water pump; 6. First drain valve; 9. Second inlet valve; 10. Second water pump; 11. Second drain valve; 12. First stage valve; 13. Second stage valve; 14. Third manifold; 15. Tenth manifold; 16. First manifold; 17. Sixth manifold; 18. Twelfth manifold; 19. Seventh manifold; 20. Fourth manifold; 21. Ninth manifold; 22. Second manifold; 23. Fifth manifold; 24. Eighth manifold; 25. Eleventh manifold; 26. Main pipe; 27. First connecting pipe; 28. Second connecting pipe. Detailed Implementation
[0020] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.
[0021] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.
[0022] Please refer to Figure 1This utility model discloses an air intake duct water spray cooling device, including a water supply assembly and a water spray assembly. The water supply assembly includes a water supply pipeline. One end of the water supply pipeline is connected to a water source, and the other end supplies water to the water spray assembly. The water spray assembly includes a main pipe 26, first to twelfth nozzle groups, first to twelfth manifolds 14-25, a first connecting pipe 27, and a second connecting pipe 28. One end of the main pipe 26 is connected to the water supply pipeline, and the other end is connected to the first connecting pipe 27 and the second connecting pipe 28 respectively. The main pipe 26 is controlled by a main valve 1. The first to twelfth manifolds 14-25 are each individually controlled by a control valve. The end of the first connecting pipe 27 away from the main pipe 26 is connected to the first to eighth manifolds 14, 16, 17, 19, 20, and 22-24 respectively. A first inlet valve 4 and a first water pump 5 are provided on the first connecting pipe 27. The first water pump 5 pumps water to the first through eighth manifolds 14, 16, 17, 19, 20, and 22-24. The first inlet valve 4, located upstream of the first water pump 5, controls the opening and closing of the first connecting pipe 27. The end of the second connecting pipe 28 furthest from the main pipe 26 is connected to the ninth through twelfth manifolds 15, 18, 21, and 25, respectively. A second inlet valve 9 and a second water pump 10 are installed on the second connecting pipe 28. The second water pump 10 pumps water to the ninth through twelfth manifolds 15, 18, 21, and 25. The second inlet valve 9, located upstream of the second water pump 10, controls the opening and closing of the second connecting pipe 28. The first through twelfth nozzle assemblies are respectively installed on the first through twelfth manifolds 14-25 and located inside the compressor inlet, for spraying water into the compressor inlet.
[0023] It should be noted that the first to twelfth nozzle groups refer to: the first nozzle group, the second nozzle group, the third nozzle group, the fourth nozzle group, the fifth nozzle group, the sixth nozzle group, the seventh nozzle group, the eighth nozzle group, the ninth nozzle group, the tenth nozzle group, the eleventh nozzle group, and the twelfth nozzle group. The first to twelfth manifolds 18 refer to: the first manifold 16, the second manifold 22, the third manifold 14, the fourth manifold 20, the fifth manifold 23, the sixth manifold 17, the seventh manifold 19, the eighth manifold 24, the ninth manifold 21, the tenth manifold 15, the eleventh manifold 25, and the twelfth manifold 18. The first to eighth manifolds 24 refer to: the first manifold 16, the second manifold 22, the third manifold 14, the fourth manifold 20, the fifth manifold 23, the sixth manifold 17, the seventh manifold 19, and the eighth manifold 24. The ninth to twelfth manifolds 18 refer to: the ninth manifold 21, the tenth manifold 15, the eleventh manifold 25, and the twelfth manifold 18.
[0024] In a preferred embodiment of this invention, the third manifold 14 and the tenth manifold 15 pass through a first stage valve 12 before connecting to the first connecting pipe 27. The first manifold 16, the sixth manifold 17, the twelfth manifold 18, and the seventh manifold 19 pass through a second stage valve 13 before connecting to the first connecting pipe 27. The first stage valve 12 and the second stage valve 13 enable more efficient and reliable control of the on / off state of the first to twelfth manifolds 14-25.
[0025] The water supplied to the main pipe 26 by the water supply assembly is primarily demineralized water. Demineralized water reduces scaling and corrosion within the pipes. By spraying water mist into the compressor inlet, the temperature at the compressor inlet is reduced, and air humidity is increased, thereby improving the power generation of the CCPP unit. Furthermore, the amount of water mist sprayed into the compressor inlet can be controlled by adjusting the opening and closing of the first to twelfth manifolds 14-25, thus precisely controlling the degree of temperature reduction at the compressor inlet and ensuring the efficient and stable operation of the CCPP unit.
[0026] To more accurately control the amount of water injected into the compressor inlet, the water supply assembly also includes a weather station and a controller. The controller is communicatively connected to the weather station and the control valves of the first to twelfth manifolds 14-25. The weather station calculates the required water volume for the intake manifold water cooling device based on the meteorological conditions, and accordingly controls the opening and closing of the control valves of the first to twelfth manifolds 14-25.
[0027] Specifically, controlling the amount of water injected into the compressor inlet requires controlling the spray level. The spray level refers to the number of times the first to twelfth manifolds 14-25 are opened sequentially. For example, when the spray level is three, the first to third manifolds 14 are open, and the fourth to twelfth manifolds 18 are closed. The weather station calculates the spray level using the following formula:
[0028]
[0029] In the formula, the dry-bulb temperature is the ambient temperature, measured by a weather station. The wet-bulb temperature is also measured by a weather station. The intake air volume varies with the opening of the IGV (Inlet Guide Vane), and the intake air volume of the CCPP unit can be determined by the opening of the IGV.
[0030] The over / under cooling value is typically 0, but can also be positive or negative. When the over / under cooling value is 0, and after calculating and applying the spray levels using the above formula, if further reducing the compressor inlet temperature still increases the power generation of the CCPP unit, the over / under cooling value can be manually increased to further increase the spray levels. The maximum adjustable spray level is eight. Alternatively, when the over / under cooling value is 0, and after calculating and applying the spray levels using the above formula, the compressor inlet temperature is actually too low, the over / under cooling value can be manually decreased to reduce the spray levels.
[0031] The cooling value for each stage is determined based on the maximum cooling capacity of the intake manifold water spray cooling device. In a preferred embodiment of this invention, the first nozzle group includes twenty-eight nozzles. The second nozzle group includes twenty-seven nozzles. The third nozzle group includes twenty-seven nozzles. The fourth nozzle group includes twenty-eight nozzles. The fifth nozzle group includes twenty-eight nozzles. The sixth nozzle group includes twenty-seven nozzles. The seventh nozzle group includes twenty-seven nozzles. The eighth nozzle group includes twenty-eight nozzles. The ninth to twelfth nozzle groups each contain fifty-five nozzles. With this configuration, there are twelve spray stages, with each of the first to twelfth nozzle groups constituting one stage. For each additional spray stage, the temperature at the compressor inlet can be reduced by 1.23°C. In practice, for a CCPP unit with a set load of 137.6MW, its power generation increases with the increase in the number of spray stages; for each additional spray stage, the CCPP unit's power generation can increase by 3MW.
[0032] After calculating the number of spray levels, the controller can adjust the amount of water injected into the compressor inlet by controlling the opening and closing of the first to twelfth manifolds 14-25.
[0033] Of course, in practice, the total number of spray levels and the number of nozzles in each level of the intake water spray cooling device can be adjusted appropriately according to the unit's parameters and operating environment, which will not be elaborated here.
[0034] The water supply assembly also includes a cartridge filter and a spray pump assembly. The spray pump assembly is installed on the water supply pipeline. The cartridge filter is installed on the water supply pipeline, upstream of the spray pump assembly, and is used to remove impurities from the water. The spray pump assembly consists of multiple spray pumps connected in series to increase the water pressure in the water supply pipeline, ensuring that water can be stably sprayed from each nozzle. The cartridge filter has the advantages of fast filtration speed and resistance to high temperature and high pressure, which contributes to the efficient and stable operation of the air intake water spray cooling device.
[0035] To further reduce impurities in the water flow within the main pipe 26 and its downstream pipes, an inlet filter 2 is installed on the main pipe 26. The inlet filter 2 is located downstream of the inlet valve. Through the combined action of the inlet filter 2 and the cartridge filter, blockages in the main pipe 26, its downstream pipes, and at each nozzle can be reduced, which is beneficial to the efficient and stable operation of the air intake water spray cooling device.
[0036] Please continue to refer to Figure 1 When the ambient temperature is low, especially below zero degrees Celsius, cooling is no longer required at the compressor inlet. If water remains in the main pipe 26 and its downstream pipes at this time, there is a risk of freezing and cracking. To prevent freezing and cracking of the main pipe 26 and its downstream pipes, a first drain valve 6 is installed on the first connecting pipe 27, located between the first water pump 5 and the first to eighth manifolds 14, 16, 17, 19, 20, and 22-24. A second drain valve 11 is installed on the second connecting pipe 28, located between the second water pump 10 and the ninth to twelfth manifolds 15, 18, 21, and 25.
[0037] When the ambient temperature is low and cooling is no longer needed at the compressor inlet, opening the first drain valve 6 and the second drain valve 11 will drain the remaining water in the main pipe 26 and its downstream pipes, which can effectively prevent the main pipe 26 and its downstream pipes from freezing and cracking.
[0038] Furthermore, the first drain valve 6 and the second drain valve 11 alone may not be sufficient to completely drain the remaining water from the main pipe 26 and its downstream pipes. To completely drain the remaining water from the main pipe 26 and its downstream pipes, a nitrogen pipe 3 is connected to the main pipe 26. The nitrogen pipe 3 is used to inject nitrogen into the main pipe 26. The nitrogen enters from the main pipe 26 and exits from each nozzle. This not only prevents the main pipe 26 and its downstream pipes from freezing and cracking, but also removes algae from the main pipe 26 and its downstream pipes, preventing algae from multiplying and clogging the nozzles.
[0039] The implementation principle of the intake water spray cooling device of this utility model is as follows: after calculating the spray level through the meteorological station, the controller controls the on / off of the first to twelfth manifolds 14-25 to adjust the water spray volume of the intake water spray cooling device to a state that is compatible with the ambient temperature and the intake volume of the unit, thereby implementing water spray cooling at the inlet of the compressor of the CCPP unit.
[0040] The intake water spray cooling device of this utility model reduces the air temperature at the compressor inlet of the CCPP unit by spraying water to cool the air, thereby increasing the air humidity. This improves the problem that when the ambient temperature rises, the temperature of the combustion gas and the air rise simultaneously, resulting in a decrease in gas density and oxygen content in the air, which in turn leads to the actual load of the CCPP unit being lower than the set load. This is beneficial to the efficient and stable operation of the CCPP unit.
[0041] Furthermore, this utility model has a compact and simple structure, is easy to operate and maintain, is applicable to various similar units, helps to reduce equipment investment and operating costs, and has great potential for promotion and utilization.
[0042] Based on the inlet water spray cooling device, this utility model also discloses a compressor, in which the aforementioned inlet water spray cooling device is installed at the inlet of the compressor. This allows the temperature at the compressor inlet to be adjusted according to meteorological conditions, thereby improving the problem that when the ambient temperature rises, the temperatures of the combustion gas and air rise simultaneously, leading to a decrease in gas density and oxygen content in the air, which in turn causes the actual load of the CCPP unit to be lower than the set load. This is beneficial for the efficient and stable operation of the CCPP unit.
[0043] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. An air intake duct water spray cooling device, characterized in that, Includes water supply components and sprinkler components; among which, The water supply assembly includes a water supply pipeline; one end of the water supply pipeline is connected to a water source, and the other end supplies water to the water spray assembly. The water spray assembly includes a main pipe (26), a first to twelfth nozzle group, a first to twelfth manifold (14-25), a first connecting pipe (27), and a second connecting pipe (28); One end of the main pipe (26) is connected to the water supply pipeline, and the other end is connected to the first connecting pipe (27) and the second connecting pipe (28) respectively; The first to twelfth manifolds (18) are each individually controlled by a control valve to open or close; The end of the first connecting pipe (27) away from the main pipe (26) is connected to the first to eighth manifolds (14, 16, 17, 19, 20, 22-24) respectively; the first connecting pipe (27) is provided with a first inlet valve (4) and a first water pump (5); the first water pump (5) is used to pump water to the first to eighth manifolds (14, 16, 17, 19, 20, 22-24); the first inlet valve (4) is located upstream of the first water pump (5) and is used to control the opening and closing of the first connecting pipe (27); The end of the second connecting pipe (28) away from the main pipe (26) is connected to the ninth to twelfth manifolds (15, 18, 21, 25) respectively; a second inlet valve (9) and a second water pump (10) are provided on the second connecting pipe (28); the second water pump (10) is used to pump water to the ninth to twelfth manifolds (15, 18, 21, 25); the second inlet valve (9) is located upstream of the second water pump (10) and is used to control the opening and closing of the second connecting pipe (28); The first to twelfth nozzle groups are respectively installed on the first to twelfth manifolds (14-25) and located inside the compressor inlet, for spraying water into the compressor inlet.
2. The intake duct water spray cooling device according to claim 1, characterized in that: The first nozzle group includes twenty-eight nozzles; the second nozzle group includes twenty-seven nozzles; the third nozzle group includes twenty-seven nozzles; the fourth nozzle group includes twenty-eight nozzles; the fifth nozzle group includes twenty-eight nozzles; the sixth nozzle group includes twenty-seven nozzles; the seventh nozzle group includes twenty-seven nozzles; and the eighth nozzle group includes twenty-eight nozzles.
3. The intake duct water spray cooling device according to claim 1 or 2, characterized in that: Each of the ninth to twelfth nozzle groups contains fifty-five nozzles.
4. The intake duct water spray cooling device according to claim 1, characterized in that, The water supply system also includes a weather station and a controller; The controller is communicatively connected to the weather station and the control valves of the first to twelfth manifolds (18); The weather station is used to control the on / off state of the control valves of the first to twelfth manifolds (14-25) according to the meteorological conditions of the air intake water spray cooling device.
5. The intake duct water spray cooling device according to claim 1 or 4, characterized in that: The water supply assembly also includes a cartridge filter and a water pump set; The water pump set is installed on the water supply pipeline; The tubular filter is installed on the water supply pipeline and located upstream of the water pump set to remove impurities from the water.
6. The intake duct water spray cooling device according to claim 1, characterized in that: A first drain valve (6) is provided on the first connecting pipe (27), and the first drain valve (6) is located between the first water pump (5) and the first to eighth manifolds (14, 16, 17, 19, 20, 22-24); A second drain valve (11) is provided on the second connecting pipe (28), and the second drain valve (11) is located between the second water pump (10) and the ninth to twelfth manifolds (15, 18, 21, 25).
7. The intake duct water spray cooling device according to claim 1, characterized in that: A nitrogen pipe (3) is connected to the main pipe (26); the nitrogen pipe (3) is used to inject nitrogen into the main pipe (26); the nitrogen enters from the main pipe (26) and exits from each nozzle.
8. The intake duct water spray cooling device according to claim 5, characterized in that, An inlet filter (2) is provided on the main pipe (26); The inlet filter (2) is located downstream of the inlet valve.
9. A compressor, characterized in that, The compressor is provided with an air intake water spray cooling device as described in any one of claims 1-8 at the air intake inlet.