A full-operating smoke elimination and cooling system for diesel generator sets

Abstract

The present invention provides a full-operating-condition smoke elimination and cooling system for a diesel generator set, comprising: a water-washing dust removal and cooling device, a first mixed air cooling device, a second mixed air cooling device, a first water pipe, a first air duct, a second air duct, a third air duct, a fourth air duct, a fifth air duct and a sixth air duct. The present invention utilizes ambient cold air as a cold source to exchange heat with the smoke-containing mixed air, which can greatly reduce the water consumption of the water-washing dust removal and cooling device. At the same time, it is beneficial to reduce the temperature of the smoke-containing mixed air to a temperature close to that of the ambient air, and can meet the requirement that the temperature difference between the exhaust smoke and the ambient air is within a range of 4°C under different ambient temperature conditions. By switching the valve, the heat exchange flow direction of the mixed air and the ambient cold air in the heat exchanger is controlled, so that when ice blockage occurs in the heat exchanger, the mixed air first passes through the heat exchanger for ice melting and cooling, and then the mixed air enters the cooling and discharge, which can ensure the normal operation of the system at low temperatures.

Description

Technical Field

[0001] The invention belongs to the technical field of ventilation and air-conditioning systems, and in particular relates to a full-operating-condition smoke elimination and temperature reduction system for a diesel generator set. Background Art

[0002] Diesel power stations use diesel as fuel, converting the chemical energy of diesel into electrical energy, and are generally used for uninterrupted power supply during power outages or special occasions. Diesel combustion produces a large amount of high-temperature exhaust gas, the exhaust temperature of which is generally several hundred degrees Celsius, accompanied by incomplete combustion particulate matter visible to the naked eye.

[0003] There are many measures for exhaust, smoke elimination and cooling of diesel generator sets. Generally speaking, they can be divided into two aspects: flue gas dust removal and flue gas cooling. Flue gas dust removal usually adopts two categories: wet dust removal and dry dust removal: wet dust removal uses liquid adsorbent to purify flue gas particles by adsorption; dry dust removal uses filtering, electrostatic dust collection and other technologies to purify and remove incompletely burned particles in flue gas. Flue gas cooling usually adopts three types: wall heat exchange, evaporative cooling and mixed air cooling: wall heat exchange introduces high-temperature flue gas and cold source fluid into the heat exchanger, and realizes flue gas heat exchange and cooling on both sides of the cold and hot fluid channel partitions inside the heat exchanger; evaporative cooling directly contacts the evaporative liquid with the high-temperature flue gas, and uses the evaporation phase change of the evaporative liquid to absorb heat to achieve flue gas cooling; mixed air cooling introduces cold air from a low-temperature environment to mix with the high-temperature flue gas to reduce the flue gas temperature.

[0004] The Chinese invention patent "Smoke elimination and cooling device for diesel generator sets" (CN106762037A) discloses a smoke elimination and cooling device for diesel generator sets, including a smoke mist treatment chamber, a demister chamber and a smoke elimination reaction liquid of attapulgite. The exhaust smoke of the diesel generator set is first introduced into the demister chamber for cooling, and then enters the demister chamber for liquid removal and discharge.

[0005] The Chinese invention patent "Smoke elimination and cooling unit and diesel generator using the unit" (CN108104905A) discloses a smoke elimination and cooling unit and a diesel engine using the unit, including a first-stage cooler, a second-stage cooler and an electrostatic smoke eliminator. The exhaust smoke of the diesel generator set is first introduced into the first-stage cooler for spraying and cooling, then enters the second-stage cooler for wall heat exchange and cooling, and then enters the electrostatic smoke eliminator for electrostatic smoke elimination and dust removal.

[0006] The technical solutions of the above-mentioned patents all have the following problems: First, flue gas cooling relies on cooling by evaporation of cooling water, which consumes a large amount of water and is not very practical for certain projects with scarce water sources; second, smoke elimination mainly relies on electrostatic smoke eliminators or attapulgite reaction liquids, which require frequent dust collection and cleaning and replacement and replenishment of reaction liquids, and the degree of engineering of the devices is low, and the use and maintenance are complicated; third, the moisture content of the exhaust gas after treatment by the device is high, and white mist is easily generated locally in the exhaust gas under low-temperature environmental conditions, and the visible light exposure characteristics of the exhaust gas are obvious; fourth, limited by the temperature of the cooling water source, the device cannot reduce the exhaust gas to within 4°C of the ambient air temperature under low-temperature environmental conditions, and the exhaust gas has obvious thermal infrared characteristics. Summary of the invention

[0007] In view of the defects involved in the background technology, the present invention provides a full-operating-condition smoke elimination and cooling system for a diesel generator set to solve the technical problems of the existing diesel generator set exhaust smoke elimination and cooling system, such as large water consumption, complex maintenance, low degree of engineering, and unsignificant smoke elimination and cooling effect.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] A full-operating-condition smoke elimination and cooling system for a diesel generator set comprises: a water-washing dust removal and cooling device, a first air-mixing cooling device, a second air-mixing cooling device, a first water pipe, a first air duct, a second air duct, a third air duct, a fourth air duct, a fifth air duct and a sixth air duct.

[0010] The water-washing dust removal and cooling device is connected to the water source through the first water pipe, connected to the exhaust pipe of the diesel generator set through the first air duct, and connected to the first mixed air cooling device through the second air duct;

[0011] The first air mixing and cooling device is respectively connected to the water-washing dust removal and cooling device and the exhaust duct of the diesel generator room through the second air duct, and is connected to the second air mixing and cooling device through the third air duct and the fourth air duct;

[0012] The second air mixing and cooling device is connected to the first air mixing and cooling device through the third air duct and the fourth air duct, and is connected to the external environment through the fifth air duct and the sixth air duct respectively.

[0013] Furthermore, the water-washing dust removal and cooling device comprises a water pump, a spray tower and a first gas-liquid separator;

[0014] The water inlet of the water pump is connected to the water source through the first water pipe, and the water outlet of the water pump is connected to the water inlet of the spray tower;

[0015] The air inlet of the spray tower is connected to the exhaust pipe of the diesel generator set through the first air duct, and the air outlet of the spray tower is connected to the air inlet of the first gas-liquid separator;

[0016] The air outlet of the first gas-liquid separator is connected to the second air duct.

[0017] Furthermore, the full-operating smoke elimination and cooling system for the diesel generator set also includes a second water pipe, which is connected to the water outlet of the spray tower and is used to discharge the cooling water in the spray tower.

[0018] Further, the first air mixing and cooling device includes a first fan, a second fan, a first heat exchanger and a second gas-liquid separator;

[0019] The air intake end of the first fan is connected to the air outlet of the first gas-liquid separator and the exhaust duct of the diesel generator room through the second air duct, and the air exhaust end of the first fan is connected to the hot end air inlet of the first heat exchanger;

[0020] The cold end air inlet of the first heat exchanger is connected to the second air mixing and cooling device through the third air duct, and the cold end air outlet of the first heat exchanger is connected to the air intake end of the second fan;

[0021] The hot end air outlet of the first heat exchanger is connected to the air inlet of the second gas-liquid separator;

[0022] The air outlet of the second gas-liquid separator is connected to the second air mixing and cooling device through the fourth air duct.

[0023] Furthermore, the second air mixing and cooling device includes a second heat exchanger and a third heat exchanger;

[0024] The air outlet of the second gas-liquid separator is connected to the hot end air inlet of the second heat exchanger and the hot end air inlet of the third heat exchanger through the fourth air duct;

[0025] The cold end air inlet of the second heat exchanger and the cold end air inlet of the third heat exchanger are respectively connected to the external environment through the fifth air duct;

[0026] The cold end air outlet of the second heat exchanger and the cold end air outlet of the third heat exchanger are respectively connected to the cold end air inlet of the first heat exchanger through the third air duct;

[0027] The hot end air outlet of the second heat exchanger and the hot end air outlet of the third heat exchanger are respectively connected to the external environment through the sixth air duct.

[0028] Furthermore, the second air mixing and cooling device further includes a first micromanometer and a second micromanometer;

[0029] Wherein, two ends of the first micromanometer are respectively connected to the cold end air inlet and the cold end air outlet of the second heat exchanger, and are used to measure the pressure difference between the cold end air inlet and the cold end air outlet of the second heat exchanger;

[0030] Two ends of the second micromanometer are respectively connected to the cold end air inlet and the cold end air outlet of the third heat exchanger, and are used to measure the pressure difference between the cold end air inlet and the cold end air outlet of the third heat exchanger.

[0031] Furthermore, the cold end air inlet, cold end air outlet, hot end air inlet and hot end air outlet of the second heat exchanger are equipped with air valves;

[0032] Air valves are installed at the cold end air inlet, cold end air outlet, hot end air inlet and hot end air outlet of the third heat exchanger.

[0033] Further, the hot end air inlet and hot end air outlet of the second heat exchanger are connected to the hot end air inlet and hot end air outlet of the third heat exchanger through a seventh air pipe;

[0034] Air valves are installed between the hot end air inlet of the second heat exchanger and the seventh air pipe, between the hot end air outlet of the second heat exchanger and the seventh air pipe, between the hot end air inlet of the third heat exchanger and the seventh air pipe, and between the hot end air outlet of the third heat exchanger and the seventh air pipe.

[0035] Furthermore, the air valve is an electric air valve.

[0036] Furthermore, the first heat exchanger, the second heat exchanger and the third heat exchanger are plate heat exchangers.

[0037] The beneficial effects of the full-operating-condition smoke elimination and temperature reduction system for diesel generator sets of the present invention are as follows:

[0038] ⑴ The first mixed air cooling device and the second mixed air cooling device use the ambient cold air as a cold source, and introduce the ambient cold air as a cold source into the second heat exchanger and the third heat exchanger of the first mixed air cooling device and the second mixed air cooling device to exchange heat with the smoke-containing mixed air, which can greatly reduce the water consumption of the water washing dust removal cooling device. ⑵ Introducing external cold air as a cold source to perform multiple heat exchange and cooling of the smoke-containing mixed air in the first mixed air cooling device and the second mixed air cooling device is conducive to reducing the temperature of the smoke-containing mixed air to close to the ambient air temperature, and can achieve the requirement that the temperature difference between the exhaust gas and the ambient air is within 4°C under different ambient temperature conditions. ⑶ By switching the valve, the heat exchange flow direction of the mixed air and ambient cold air in the first heat exchanger and the second heat exchanger is controlled, so that when ice blockage occurs in the second heat exchanger (third heat exchanger), the ambient cold air passes through the third heat exchanger (second heat exchanger), and at the same time, the mixed air first passes through the second heat exchanger (third heat exchanger) for ice melting and cooling, and then the mixed air enters the third heat exchanger (second heat exchanger) for cooling and discharge again, which can ensure the normal operation of the system at low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the system structure of an embodiment of a full-operating smoke elimination and temperature reduction system for a diesel generator set of the present invention;

[0040] Figure 2 It is a schematic diagram of the fluid flow direction of a full-operation smoke elimination and temperature reduction system of a diesel generator set of the present invention when it is working normally;

[0041] Figure 3 The present invention is a schematic diagram of the fluid flow direction of a full-operation smoke elimination and temperature reduction system of a diesel generator set during ice melting operation. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.

[0043] This embodiment discloses a full-operation smoke elimination and temperature reduction system for a diesel generator set. The system structure diagram is as follows: Figure 1 As shown, it includes: a water washing dust removal and cooling device 1, a first mixed air cooling device 2, a second mixed air cooling device 3, a first water pipe 4, a first air duct 5, a second air duct 6, a third air duct 7, a fourth air duct 8, a fifth air duct 9 and a sixth air duct 10.

[0044] The water-washing dust removal and cooling device 1 is connected to the water source through the first water pipe 4, connected to the exhaust pipe of the diesel generator set through the first air duct 5, and connected to the first mixed air cooling device 2 through the second air duct. The water-washing dust removal and cooling device 1 of the present invention directly contacts the flue gas discharged from the diesel generator set through the cooling water from the water source, thereby achieving the effect of dust removal and cooling.

[0045] The first air mixing cooling device 2 is connected to the water washing dust removal cooling device 1 and the exhaust duct of the diesel generator room through the second air duct 6, and is connected to the second air mixing cooling device 3 through the third air duct 7 and the fourth air duct 8.

[0046] The second air mixing and cooling device 3 is connected to the first air mixing and cooling device 1 through the third air duct 7 and the fourth air duct 8, and is connected to the external environment through the fifth air duct 9 and the sixth air duct 10 respectively.

[0047] The first mixed air cooling device 2 and the second mixed air cooling device 3 of the present invention, by introducing external cold air, make full use of the cold air's cooling capacity, and further perform multiple heat exchange and cooling on the flue gas after dust removal and cooling by the water washing dust removal and cooling device 1, thereby facilitating the reduction of the temperature of the smoke-containing mixed air to close to the ambient temperature, and meeting the requirement that the temperature difference between the exhaust gas and the ambient air is within 4°C under different environmental conditions.

[0048] In this embodiment, the water-washing dust removal and cooling device 1 is mainly used for cooling the flue gas to remove dust and cool it, and includes a water pump 11, a spray tower 12 and a first gas-liquid separator 13.

[0049] The water inlet of the water pump 11 is connected to the water source through the first water pipe 4, and the water outlet of the water pump 11 is connected to the water inlet of the spray tower 12, and the water inlet of the spray tower 12 is located at the upper part of the tower body.

[0050] An air inlet is provided at the lower part of the tower body of the spray tower 12, and the air inlet is connected to the exhaust pipe of the diesel generator set through the first air duct 5, so as to introduce the high-temperature smoke-containing gas exhausted by the diesel generator set into the spray tower 12. The smoke-containing gas contains a large amount of water vapor after water-cooling dust removal and cooling, and the water therein needs to be separated in the subsequent treatment. Therefore, the water-washing dust removal and cooling device 1 is provided with a first gas-liquid separator 13 at the air outlet located at the upper part of the tower body of the spray tower 12, and the air outlet of the spray tower 12 is connected to the air inlet of the first gas-liquid separator 13, and the air outlet of the first gas-liquid separator 13 is connected to the second air duct 6. After the gas after dust removal and cooling by the water-washing dust removal and cooling device 1 passes through the first gas-liquid separator 13 to remove liquid, it enters the first mixed air cooling device 2 through the second air duct 6 for further cooling treatment.

[0051] In a preferred embodiment, the full-operation smoke elimination and cooling system for diesel generator sets further includes a second water pipe 14 , which is connected to the water outlet of the spray tower 12 and is used to discharge the cooling water in the spray tower 12 .

[0052] In a preferred embodiment, the water pump 11 is provided with a frequency conversion adjustment mechanism (not shown in the figure) for adjusting the water supply of the water pump 11 according to actual cooling needs.

[0053] In this embodiment, the first air mixing and cooling device 2 includes a first fan 21 , a second fan 22 , a first heat exchanger 23 and a second gas-liquid separator 24 .

[0054] Among them, the suction end of the first fan 21 is connected to the outlet of the first gas-liquid separator 13 and the exhaust duct of the diesel generator room through the second air duct 6, and the exhaust end of the first fan 21 is connected to the hot end air inlet of the first heat exchanger 23, which is used to mix the gas that has been dusted, cooled and dried by the water washing dust removal and cooling device 1 with the air discharged from the exhaust duct of the diesel generator room and send it to the first heat exchanger 23 for heat exchange and cooling.

[0055] The cold end air inlet of the first heat exchanger 23 is connected to the second air mixing and cooling device 3 through the third air duct 7, and the cold end air outlet of the first heat exchanger 23 is connected to the air intake end of the second fan 22. By adjusting the air intake volume of the second fan 22, the intake volume of the external cold air can be increased or decreased, thereby adjusting the cooling effect of the high-temperature gas. In a preferred embodiment, the exhaust end of the second fan 22 discharges the air after heat exchange to the air conditioning and ventilation system of the project, thereby recovering part of the energy and further achieving energy saving and emission reduction.

[0056] The hot end air outlet of the first heat exchanger 23 is connected to the air inlet of the second gas-liquid separator 24, and the air outlet of the second gas-liquid separator 24 is connected to the second air mixing and cooling device 3 through the fourth air duct 8, and the dried gas is further heat exchanged and cooled by the second air mixing and cooling device 3 before being discharged to the external environment. After the drying effect of the second gas-liquid separator 24, the moisture in the gas is further removed, thereby avoiding the local generation of white mist when discharged to the external environment under low temperature environment.

[0057] In a preferred embodiment, the first heat exchanger 23 adopts a plate heat exchanger, which has high heat exchange efficiency and small average heat transfer temperature difference, so that the cooling effect of the full-operating smoke elimination and cooling system of the diesel generator set of the present invention is significant and the energy consumption is low.

[0058] In this embodiment, the second air mixing and cooling device 3 includes a second heat exchanger 31 and a third heat exchanger 32. The air outlet of the second gas-liquid separator 24 is connected to the hot end air inlet of the second heat exchanger 31 and the hot end air inlet of the third heat exchanger 32 through the fourth air duct 8.

[0059] The cold end air inlet of the second heat exchanger 31 and the cold end air inlet of the third heat exchanger 32 are respectively connected to the external environment through the fifth air duct 9; the cold end air outlet of the second heat exchanger 31 and the cold end air outlet of the third heat exchanger 32 are respectively connected to the cold end air inlet of the first heat exchanger 23 through the third air duct 7; the hot end air outlet of the second heat exchanger 31 and the hot end air outlet of the third heat exchanger 32 are respectively connected to the external environment through the sixth air duct 10.

[0060] Since the hot gas is cooled by heat exchange with the outside cold air in the second heat exchanger 31 and the third heat exchanger 32, on the one hand, the high-temperature gas discharged by the diesel generator set can be reduced to the ambient temperature and discharged to the outside for exchange; on the other hand, the high-temperature gas can be used to heat the outside cold air and discharge it to the air-conditioning and ventilation system, thereby achieving the dual effects of significant cooling and energy recovery, saving energy and reducing emissions.

[0061] In a preferred embodiment, the second air mixing and cooling device 3 further includes a first micromanometer 33 and a second micromanometer 34 .

[0062] The two ends of the first micromanometer 33 are respectively connected to the cold end air inlet and the cold end air outlet of the second heat exchanger 31, and are used to measure the pressure difference between the cold end air inlet and the cold end air outlet of the second heat exchanger 31. The two ends of the second micromanometer 34 are respectively connected to the cold end air inlet and the cold end air outlet of the third heat exchanger 32, and are used to measure the pressure difference between the cold end air inlet and the cold end air outlet of the third heat exchanger 32.

[0063] The second air mixing and cooling device 3 is provided with a first micromanometer 33 and a second micromanometer 34, which can identify whether ice blockage occurs inside the second heat exchanger 31 and the third heat exchanger 32 by monitoring the air pressure difference between the cold end air inlet and the cold end air outlet of the second heat exchanger 31 and the third heat exchanger 32. When ice blockage occurs, the flow direction of the high-temperature gas can be changed to melt the ice. When all the ice inside the second heat exchanger 31 and the third heat exchanger 32 is melted, the gas flow direction can be changed to perform normal heat exchange and cooling work.

[0064] In a preferred embodiment, the cold end air inlet, cold end air outlet, hot end air inlet and hot end air outlet of the second heat exchanger 31 are installed with air valves, shown as air valves 35, 36, 37, 38; the cold end air inlet, cold end air outlet, hot end air inlet and hot end air outlet of the third heat exchanger 32 are installed with air valves, shown as air valves 39, 310, 311, 312.

[0065] The hot end air inlet and hot end air outlet of the second heat exchanger 31 are connected to the hot end air inlet and hot end air outlet of the third heat exchanger 32 through the seventh air pipe 15. An air valve 313 is installed between the hot end air inlet of the second heat exchanger 31 and the seventh air pipe 15, an air valve 314 is installed between the hot end air outlet of the second heat exchanger 31 and the seventh air pipe 15, an air valve 315 is installed between the hot end air inlet of the third heat exchanger 32 and the seventh air pipe 15, and an air valve 316 is installed between the hot end air outlet of the third heat exchanger 32 and the seventh air pipe 15.

[0066] The above-mentioned air valve can preferably be an electric air valve. By setting the air valve, the air valve can be opened and closed manually or automatically, so as to achieve the purpose of changing the gas flow direction.

[0067] Working principle:

[0068] When the full-operation smoke elimination and cooling system of the diesel generator set is working normally, the fluid flows as follows: Figure 2 shown.

[0069] The water pump 11 is started to guide the cooling water from the water source to the spray tower 12, and the frequency of the water pump 11 is adjusted to further adjust the supply amount of the cooling water.

[0070] Start the air valves 38, 312, 35, 39, 36, 310, 37, and 311 in sequence, and start the first fan 21 and the second fan 22 at the same time, and monitor in real time the smoke inlet temperature of the spray tower 12, the smoke inlet air volume of the spray tower 12, the mixed air temperature and mixed air volume at the exhaust end of the first fan 21, the mixed air temperature discharged from the hot end outlet of the first heat exchanger 23, the external ambient air temperature, the external ambient air volume, the exhaust air temperature of the sixth air duct 10, the air pressure difference between the cold end inlet and the cold end outlet of the second heat exchanger 31, and the air pressure difference between the cold end inlet and the cold end outlet of the third heat exchanger 32.

[0071] Adjust the working frequency of the second fan 22 so that the amount of cold air introduced from the external environment meets the exhaust temperature of the sixth air duct 10 and the exhaust temperature is 4°C higher than the ambient cold air temperature. At this point, the dust removal and cooling treatment of the high-temperature gas emitted by the diesel generator set is completed and discharged to the external environment.

[0072] When the diesel generator set full-operation smoke elimination and cooling system is melting ice, the fluid flows as follows Figure 3 shown.

[0073] When the pressure difference between the cold end air inlet and the cold end air outlet of the third heat exchanger 32 is monitored to exceed 500Pa, ice blockage occurs inside the third heat exchanger 32 and the ice needs to be melted. At this time, the air valves 310, 316, and 313 are opened in sequence, and the air valves 36, 39, 312, and 311 are closed in sequence, and the third heat exchanger 32 is heated by high-temperature gas, so that the ice inside the third heat exchanger 32 is melted.

[0074] After the ice in the third heat exchanger 32 melts, the operation flow for normal operation can be entered.

[0075] In summary, the present invention provides a full-operating smoke elimination and cooling system for a diesel generator set, which utilizes ambient cold air as a cold source, and introduces the ambient cold air as a cold source into the first heat exchanger and the second heat exchanger of the first mixed air cooling device and the second mixed air cooling device, and exchanges heat with the smoke-containing mixed air, which can greatly reduce the water consumption of the water washing dust removal and cooling device. At the same time, it is beneficial to reduce the temperature of the smoke-containing mixed air to close to the ambient air temperature, and can meet the requirement that the temperature difference between the exhaust smoke and the ambient air is within 4°C under different ambient temperature conditions. By switching the valve, the heat exchange flow direction of the mixed air and ambient cold air in the heat exchanger is controlled, so that when ice blockage occurs in the heat exchanger, the mixed air first passes through the heat exchanger for ice melting and cooling, and then the mixed air enters the cooling and discharge, which can ensure the normal operation of the system at low temperatures.

[0076] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are also possible, and therefore, the scope of the present invention should not be limited to the above embodiments. For those of ordinary skill in the art, several improvements can also be made without departing from the principles of the present invention, and these improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A full-operation smoke elimination and cooling system for diesel generator sets, characterized in that: include: A water-washing dust removal and cooling device, a first air-mixing cooling device, a second air-mixing cooling device, a first water pipe, a first air pipe, a second air pipe, a third air pipe, a fourth air pipe, a fifth air pipe and a sixth air pipe; The water-washing dust removal and cooling device is connected to a water source through a first water pipe, connected to a smoke exhaust pipe of the diesel generator set through a first air duct, and connected to the first air mixing cooling device through a second air duct; The first air mixing and cooling device is connected to the water-washing dust removal and cooling device and the exhaust duct of the diesel generator room through the second air duct, and is connected to the second air mixing and cooling device through the third air duct and the fourth air duct; The second air mixing and cooling device is connected to the first air mixing and cooling device through a third air duct and a fourth air duct, and is connected to the external environment through a fifth air duct and a sixth air duct respectively; The water-washing, dust-removing and cooling device comprises a water pump, a spray tower and a first gas-liquid separator; The water inlet of the water pump is connected to the water source through the first water pipe, and the water outlet of the water pump is connected to the water inlet of the spray tower; The air inlet of the spray tower is connected to the exhaust pipe of the diesel generator set through the first air duct, and the air outlet of the spray tower is connected to the air inlet of the first gas-liquid separator; The air outlet of the first gas-liquid separator is connected to the second air duct; The diesel generator set full-operation smoke elimination and temperature reduction system also includes a second water pipe, which is connected to the water outlet of the spray tower and is used to discharge the cooling water in the spray tower; The first air mixing and cooling device comprises a first fan, a second fan, a first heat exchanger and a second gas-liquid separator; The air intake end of the first fan is connected to the air outlet of the first gas-liquid separator and the exhaust duct of the diesel generator room through the second air duct, and the air exhaust end of the first fan is connected to the hot end air inlet of the first heat exchanger; The cold end air inlet of the first heat exchanger is connected to the second air mixing and cooling device through the third air duct, and the cold end air outlet of the first heat exchanger is connected to the air intake end of the second fan; The hot end air outlet of the first heat exchanger is connected to the air inlet of the second gas-liquid separator; The air outlet of the second gas-liquid separator is connected to the second air mixing and cooling device through the fourth air duct; The water pump is provided with a frequency conversion regulating mechanism.

2. A diesel generator set full-operating smoke elimination and temperature reduction system as claimed in claim 1, characterized in that: The second air mixing and cooling device includes a second heat exchanger and a third heat exchanger; The air outlet of the second gas-liquid separator is connected to the hot end air inlet of the second heat exchanger and the hot end air inlet of the third heat exchanger respectively through the fourth air duct; The cold end air inlet of the second heat exchanger and the cold end air inlet of the third heat exchanger are respectively connected to the external environment through the fifth air duct; The cold end air outlet of the second heat exchanger and the cold end air outlet of the third heat exchanger are respectively connected to the cold end air inlet of the first heat exchanger through the third air duct; The hot end air outlet of the second heat exchanger and the hot end air outlet of the third heat exchanger are respectively connected to the external environment through the sixth air duct.

3. A full-operation smoke elimination and temperature reduction system for a diesel generator set as claimed in claim 2, characterized in that: The second air mixing and cooling device also includes a first micromanometer and a second micromanometer; The two ends of the first micromanometer are respectively connected to the cold end air inlet and the cold end air outlet of the second heat exchanger, and are used to measure the air pressure difference between the cold end air inlet and the cold end air outlet of the second heat exchanger; Two ends of the second micromanometer are respectively connected to the cold end air inlet and the cold end air outlet of the third heat exchanger, and are used to measure the pressure difference between the cold end air inlet and the cold end air outlet of the third heat exchanger.

4. A full-operation smoke elimination and temperature reduction system for a diesel generator set as claimed in claim 3, characterized in that: The cold end air inlet, cold end air outlet, hot end air inlet and hot end air outlet of the second heat exchanger are equipped with air valves; The cold end air inlet, the cold end air outlet, the hot end air inlet and the hot end air outlet of the third heat exchanger are installed with air valves.

5. A full-operation smoke elimination and temperature reduction system for a diesel generator set as claimed in claim 4, characterized in that: The hot end air inlet and hot end air outlet of the second heat exchanger are connected to the hot end air inlet and hot end air outlet of the third heat exchanger through a seventh air pipe; Air valves are installed between the hot end air inlet of the second heat exchanger and the seventh air pipe, between the hot end air outlet of the second heat exchanger and the seventh air pipe, between the hot end air inlet of the third heat exchanger and the seventh air pipe, and between the hot end air outlet of the third heat exchanger and the seventh air pipe.

6. A full-operation smoke elimination and temperature reduction system for a diesel generator set as claimed in claim 4 or 5, characterized in that: The air valve is an electric air valve.

7. A full-operation smoke elimination and temperature reduction system for a diesel generator set as claimed in claim 6, characterized in that: The first heat exchanger, the second heat exchanger and the third heat exchanger are plate heat exchangers.

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