阅读说明：本技术 一种零耗能直接混合降低气汽混合物温度装置 (Zero-energy-consumption device for directly mixing and reducing temperature of gas-steam mixture ) 是由 刘志锋 郝川 许伏忠 吴学斌 郝玉成 许瑞 张斌 崔磊 王永利 于 2021-07-15 设计创作，主要内容包括：本发明属于环保节能技术领域,尤其是涉及一种零耗能直接混合降低气汽混合物温度装置,包括高效射流卷吸机构、不凝气体分液器、气液二次分离器和抽真空设备,高效射流卷吸机构和不凝气体分液器装设在抽真空设备前端,抽真空设备中设置有抽真空设备管道,且高效射流卷吸机构和不凝气体分液器直接串入抽真空设备管道中,抽真空设备管道与外部的凝汽器出口连接,高效射流卷吸机构的输入端连接有化补水管道。本发明增加对不凝结气体的抽吸量,降低抽真空设备的吸入口压力,有利于气汽混合物的流动,对提高发电机组的发电效率,节能减排等方面都起着十分重要的作用。(The invention belongs to the technical field of environmental protection and energy conservation, and particularly relates to a zero-energy-consumption device for directly mixing and reducing the temperature of a gas-steam mixture, which comprises a high-efficiency jet flow entrainment mechanism, a non-condensable gas liquid separator, a gas-liquid secondary separator and vacuumizing equipment, wherein the high-efficiency jet flow entrainment mechanism and the non-condensable gas liquid separator are arranged at the front end of the vacuumizing equipment, a vacuumizing equipment pipeline is arranged in the vacuumizing equipment, the high-efficiency jet flow entrainment mechanism and the non-condensable gas liquid separator are directly connected into the vacuumizing equipment pipeline in series, the vacuumizing equipment pipeline is connected with an external condenser outlet, and the input end of the high-efficiency jet flow entrainment mechanism is connected with a chemical water supplementing pipeline. The invention increases the suction amount of non-condensable gas, reduces the pressure of the suction inlet of the vacuum-pumping equipment, is beneficial to the flow of gas-steam mixture, and plays an important role in improving the power generation efficiency of the generator set, saving energy, reducing emission and the like.)

1. The device for reducing the temperature of the gas-steam mixture through zero-energy-consumption direct mixing comprises a high-efficiency jet flow entrainment mechanism (1), a non-condensable gas liquid separator (2), a gas-liquid secondary separator (3) and vacuumizing equipment, and is characterized in that the high-efficiency jet flow entrainment mechanism (1) and the non-condensable gas liquid separator (2) are arranged at the front end of the vacuumizing equipment, a vacuumizing equipment pipeline (5) is arranged in the vacuumizing equipment, the high-efficiency jet flow entrainment mechanism (1) and the non-condensable gas liquid separator (2) are directly connected into the vacuumizing equipment pipeline (5), the vacuumizing equipment pipeline (5) is connected with an external condenser outlet, the input end of the high-efficiency jet flow entrainment mechanism (1) is connected with a chemical water replenishing pipeline (4), and chemical water replenishing from the chemical water replenishing pipeline (4) is dynamically, fully and directly mixed with the gas-steam mixture from the condenser outlet in the high-efficiency jet flow entrainment mechanism (1) for cooling, the non-condensable gas knockout (2) is connected with an external condenser bottom hot well through a gas-liquid secondary separator (3).

2. The device for reducing the temperature of the gas-steam mixture through zero-energy consumption direct mixing is characterized in that the efficient jet entrainment mechanism (1) comprises a cooling water chamber (13), a jet entrainment head group (14), a jet entrainment mixing chamber (15), a special output pipeline (16), a vacuumizing pipeline (17) and a cooling water pipeline (18), wherein the cooling water pipeline (18) is connected with the top of the cooling water chamber (13), the vacuumizing pipeline (17) is connected with the upper part of the side surface of the jet entrainment mixing chamber (15), the special output pipeline (16) is connected with the bottom of the jet entrainment mixing chamber (15), and the jet entrainment head group (14) is arranged at the upper part in the cavity of the jet entrainment mixing chamber (15).

3. The zero-energy-consumption direct-mixing gas-steam mixture temperature reducing device as claimed in claim 2, characterized in that the jet entrainment head group (14) is composed of a plurality of jet entrainment heads, and cooling water enters the jet entrainment head group (14) through a cooling water pipeline (18) and then is jetted and entrained into the mixing cavity (15) in a jet manner.

4. The device for reducing the temperature of the gas-steam mixture through zero-energy consumption direct mixing is characterized in that the jet entrainment mixing cavity (15) is directly connected in series to the vacuumizing pipe (17), the jet entrainment head group (14) forms an entrainment effect when cooling water is injected into the jet entrainment mixing cavity (15), and the entrainment effect radially sucks the gas-steam mixture consisting of water steam and non-condensable gas in the vacuumizing pipe (17) into the jet entrainment mixing cavity (15).

5. The zero-energy-consumption direct-mixing gas-steam mixture temperature reducing device as claimed in claim 4, characterized in that the special output pipeline (16) discharges a gas-steam mixture formed in the jet entrainment mixing cavity (15), wherein the gas-steam mixture consists of non-condensable gas with reduced temperature, water vapor with reduced temperature, cooling water and condensed water generated by condensing the water vapor.

6. The zero-energy-consumption direct-mixing gas-steam mixture temperature reducing device according to claim 1, wherein a chemical makeup water pipeline electric regulating valve (11) and a chemical makeup water flow (12) are respectively connected to the side wall of the chemical makeup water pipeline (4), the chemical makeup water pipeline electric regulating valve (11) performs intelligent PID automatic regulation based on model prediction on the chemical makeup water flow (12), and the chemical makeup water pipeline electric regulating valve (11) and the chemical makeup water flow (12) are both electrically connected with an external automatic control system.

7. The zero-energy-consumption direct-mixing gas-steam mixture temperature reducing device according to claim 5, characterized in that a non-condensable gas inlet (6) connected with a special output pipeline (16) is formed in the side wall of the non-condensable gas separator (2), a non-condensable gas outlet (7) is formed in the side wall of the non-condensable gas separator (2), a vacuum pumping equipment pipeline (8) is connected to the outer side of the non-condensable gas outlet (7), a hot water outlet (9) is further connected to the side wall of the non-condensable gas separator (2), the hot water outlet (9) sends heated chemical make-up water and steam condensed water into an external condenser hot well pipeline (10) through a gas-liquid secondary separator (3), and the heated chemical make-up water, the steam condensed water and the power steam condensed water can be recycled.

Technical Field

The invention relates to the technical field of environmental protection and energy conservation, in particular to a device for reducing the temperature of a gas-steam mixture by directly mixing with zero energy consumption.

Background

At present, most cold end systems of power plants in China have the problem of high energy consumption. In northern areas, the temperature difference between winter and summer and day and night is large, so that the volume flow of the gas-steam mixture to be extracted from the air-cooled condenser is large, and if the gas-steam mixture cannot be extracted in time by a vacuum-pumping system, the heat exchange effect of the air-cooled condenser can be greatly reduced. Most notably, the condenser is used as an important device of a cold end system, and people tend to underestimate the influence of vacuum deterioration caused by vacuum pumping equipment on energy consumption, and pay more attention to the influence of steam parameters on the thermal efficiency of a unit. According to statistics, in a power plant in China, the problem that 30 ten thousand of unit condensers are low in vacuum is the most serious, and the vacuum is 3% -6% lower than the design value. In addition, the greater the unit capacity, the more significant the benefit of cold end system improvements.

The commonly used evacuation equipment of power plant at present is water ring vacuum pump, and the work of water ring vacuum pump is exerted oneself very much partly and is depended on operating water temperature, receives the influence of "ultimate suction pressure" simultaneously, takes place the local air hammer phenomenon in impeller surface easily in service, and the running noise is big and make the blade produce very big tensile stress, and long-time operation easily causes the fracture of blade, threatens the safe operation of unit. The main reasons for the vacuum drop caused by the increase of the operating water temperature of the vacuum pump are: the mixed gas extracted from the condenser by the vacuum pump is composed of high-temperature steam and non-condensable gas, and the mixed gas is condensed and released in the process of entering the vacuum pump to be compressed to do work, so that the working water temperature of the vacuum pump is overhigh, and meanwhile, a large amount of overflow water is formed.

Among the existing system, through the temperature that directly reduces the working water, add or increase boiling water ring vacuum pump, reduce the mist temperature of vacuum pump suction, establish ties at the entrance of vacuum pump and can both improve the condenser vacuum, chinese patent 201220340726.6 provides a condenser evacuation cooling device if, including the condenser, its characterized in that, the connection of turning round is equipped with evacuation cooling device downwards in the vertical of the evacuation pipeline of condenser, evacuation cooling device be equipped with the casing, be equipped with gas steam inlet and outlet pipe mouth on the casing, be equipped with a set of spiral heat exchange tube in the casing. The air-steam mixture extracted from the air extraction pipeline of the condenser enters the vacuum cooling device through the air-steam inlet, spirally rotates on the inner wall of the tube body of the vacuum cooling device through the spiral heat exchange tube, and is in countercurrent contact with water in the water replenishing pipeline to exchange heat, so that steam in the air-steam mixture is condensed and dredged out, the condensation heat release of the steam in the water ring vacuum pump is reduced, the temperature of working water is reduced, the cavitation is prevented, and the suction capacity of the vacuum pump is improved.

Although the vacuumizing cooling device for the condenser overcomes the defects of the prior art to a certain extent, the vacuum degree of the condenser is improved, the gas-steam mixture and water in the water replenishing pipeline are not in direct contact heat exchange, partial air resistance is increased through the spiral heat exchange pipe, and the effect is not ideal.

Therefore, a device for reducing the temperature of the gas-steam mixture by direct mixing with zero energy consumption is provided to solve the problems.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a device for directly mixing and reducing the temperature of a gas-steam mixture with zero energy consumption.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a zero power consumption direct-mixing reduces gas-steam mixture temperature device, includes high-efficient efflux entrainment mechanism, noncondensable gas knockout, gas-liquid secondary separator and evacuation equipment, high-efficient efflux entrainment mechanism and noncondensable gas knockout are installed at evacuation equipment front end, be provided with the evacuation equipment pipeline among the evacuation equipment, and high-efficient efflux entrainment mechanism and noncondensable gas knockout directly concatenate in the evacuation equipment pipeline, evacuation equipment pipeline and outside condenser exit linkage, high-efficient efflux entrainment mechanism's input is connected with changes water supply pipeline, and changes the water supply that water supply pipeline comes and carry out the abundant direct mixing cooling of developments with the gas-steam mixture that the condenser export came in high-efficient efflux entrainment mechanism, noncondensable gas knockout is connected with outside condenser bottom heat well through gas-liquid secondary separator.

In foretell zero power consumption direct mixing reduces gas-steam mixture temperature device, high-efficient efflux entrainment mechanism includes cooling water cavity, efflux entrainment injector crowd, efflux entrainment hybrid chamber, special output pipeline, evacuation pipeline and cooling water pipeline, cooling water pipeline links to each other with cooling water cavity top, evacuation pipeline links to each other with efflux entrainment hybrid chamber side upper portion, special output pipeline links to each other with efflux entrainment hybrid chamber bottom, efflux entrainment injector crowd sets up in efflux entrainment hybrid chamber intracavity upper portion.

In the device for reducing the temperature of the gas-steam mixture by direct mixing with zero energy consumption, the jet entrainment head group consists of a plurality of jet entrainment heads, and cooling water enters the jet entrainment head group through the cooling water pipeline and then entrains the incident flow of the cooling water into the mixing cavity in a jet flow mode.

In the device for reducing the temperature of the gas-steam mixture through zero-energy-consumption direct mixing, the jet entrainment mixing cavity is directly connected in series on the vacuumizing pipeline, an entrainment effect is formed when the jet entrainment head group entrains the cooling water jet incident flow into the mixing cavity, and the entrainment effect radially sucks the gas-steam mixture consisting of water steam and non-condensable gas into the jet entrainment mixing cavity in the vacuumizing pipeline.

In the device for directly mixing and reducing the temperature of the gas-steam mixture with zero energy consumption, the special output pipeline discharges the gas-steam mixture formed in the jet entrainment mixing cavity, and the gas-steam mixture consists of non-condensable gas with reduced temperature, steam with reduced temperature, cooling water and condensed water generated by condensing the steam.

In foretell zero power consumption direct mixing reduces gas-steam mixture temperature device, change on moisturizing pipeline's the lateral wall be connected with respectively and change moisturizing pipeline electrical control valve and change moisturizing flow, change moisturizing pipeline electrical control valve and carry out intelligent PID automatically regulated based on model prediction to changing moisturizing flow, and change moisturizing pipeline electrical control valve and change moisturizing flow and all be connected with outside automatic control system electricity.

In foretell zero power consumption direct mixing reduces gas-steam mixture temperature device, be provided with the noncondensable gas import of being connected with special output pipeline on the lateral wall of noncondensable gas knockout, be provided with the noncondensable gas export on the lateral wall of noncondensable gas knockout, and the outside of noncondensable gas export is connected with and goes the evacuation equipment pipeline, still be connected with the hot water export on the lateral wall of noncondensable gas knockout, and the hot water export will heat up change moisturizing and vapor by the water of condensation send into outside condenser hot-well pipeline through gas-liquid secondary separator, the water homoenergetic that heats up change moisturizing, vapor are condensed, power steam is by the water homoenergetic realization recycle of condensation.

Compared with the prior art, the device for directly mixing and reducing the temperature of the gas-steam mixture with zero energy consumption has the advantages that:

1) increase of the amount of suction of non-condensable gases: after the vacuum device is put into operation with zero energy consumption and improved, the temperature of the mixed gas is reduced, the condensable part can be condensed in the high-efficiency jet flow entrainment mechanism in advance, the volume of the condensed steam is supplemented by the subsequent gas-steam mixture in a progressive manner, and new dynamic balance is achieved, so that the pumping quantity of the vacuum pumping equipment to the non-condensable gas is increased.

2) Reducing the suction inlet pressure of the vacuum-pumping equipment: because steam is condensed, the quantity of non-condensable gas pumped out is increased inevitably under the condition that the pressure difference between the inlet pressure of the vacuumizing pipeline and the air inlet of the vacuumizing equipment is not changed, and the vacuum of the condenser is improved.

3) The flow of the gas-steam mixture is facilitated: the gas temperature after the vacuum device is put into is reduced due to zero energy consumption, and according to a gas state equation, the volume of the high-efficiency jet flow entrainment mechanism is unchanged, the pressure in the high-efficiency jet flow entrainment mechanism is reduced along with the reduction of the temperature, and the high-efficiency jet flow entrainment mechanism is favorable for discharging uncondensed steam and leaked air in a condenser to the high-efficiency jet flow entrainment mechanism.

4) Recovering condensed water and latent heat: after the vacuum device is put into operation, a large amount of water vapor of the mixed gas in the vacuumizing pipeline is condensed, and latent heat in the water vapor is recovered. Similarly, high-temperature steam used as a power source in the vacuum generator is also largely condensed and recovers latent heat, and finally the high-temperature steam is converged to a hot well at the bottom of the condenser, so that multiple recovery of water resources and heat energy is realized.

Drawings

FIG. 1 is a block diagram of a system of a zero-energy direct mixing device for reducing the temperature of a gas-steam mixture according to the present invention;

FIG. 2 is a structural diagram of a high-efficiency jet entrainment mechanism of the zero-energy direct mixing gas-steam mixture temperature reduction device provided by the invention;

FIG. 3 is a dimensional perspective view of a CFD model of a zero-energy direct mixing and temperature lowering device for a gas-steam mixture according to the present invention;

FIG. 4 is a schematic diagram of a zero-energy direct mixing device for reducing the temperature of a gas-steam mixture according to the present invention;

FIG. 5 is a schematic diagram of a zero-energy direct mixing device for reducing the temperature of a gas-steam mixture according to the present invention;

FIG. 6 shows a device for directly mixing and reducing the temperature of a gas-steam mixture with zero energy consumption according to the present invention.

In the figure, 1 a high-efficiency jet entrainment mechanism, 2 a non-condensable gas knockout vessel, 3 a gas-liquid secondary separator, 4 a water replenishing pipeline, 5 a vacuumizing equipment pipeline, 6 a non-condensable gas inlet, 7 a non-condensable gas outlet, 8 a vacuumizing equipment pipeline, 9 a hot water outlet, 10 a condenser hot well pipeline, 11 a water replenishing pipeline electric regulating valve, 12 a water replenishing flow, 13 a cooling water chamber, 14 a jet entrainment head group, 15 a jet entrainment mixing cavity, 16 a special output pipeline, 17 a vacuumizing pipeline and 18 a cooling water pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples

Referring to fig. 1-6, a zero-energy consumption direct mixing temperature-reducing device for gas-steam mixture, comprising a high-efficiency jet entrainment mechanism 1, a non-condensable gas separator 2, a gas-liquid secondary separator 3 and a vacuum-pumping device, wherein the high-efficiency jet entrainment mechanism 1 and the non-condensable gas separator 2 are arranged at the front end of the vacuum-pumping device, the vacuum-pumping device is provided with a vacuum-pumping device pipeline 5, the high-efficiency jet entrainment mechanism 1 and the non-condensable gas separator 2 are directly connected into the vacuum-pumping device pipeline 5 in series, the vacuum-pumping device pipeline 5 is connected with an external condenser outlet, the input end of the high-efficiency jet entrainment mechanism 1 is connected with a chemical water-supplementing pipeline 4, and chemical water supplement from the chemical water-supplementing pipeline 4 is dynamically and fully and directly mixed with the gas-steam mixture from the condenser outlet in the high-efficiency jet entrainment mechanism 1 for cooling, and water steam is continuously condensed and reduced, so that the composition of the gas-steam mixture in the vacuum-pumping pipeline is changed, therefore, the content of the non-condensable gas is increased, the adopted technical mode for increasing the content of the non-condensable gas is zero energy consumption and direct mixing cooling, and the non-condensable gas liquid separator 2 is connected with an external condenser bottom hot well through the gas-liquid secondary separator 3.

Wherein, the high-efficient jet entrainment mechanism 1 comprises a cooling water cavity 13, a jet entrainment jet head group 14, a jet entrainment mixing cavity 15, a special output pipeline 16, a vacuum pumping pipeline 17 and a cooling water pipeline 18, the cooling water pipeline 18 is connected with the top of the cooling water cavity 13, the vacuum pumping pipeline 17 is connected with the upper part of the side surface of the jet entrainment mixing cavity 15, the special output pipeline 16 is connected with the bottom of the jet entrainment mixing cavity 15, the jet entrainment jet head group 14 is arranged at the upper part in the jet entrainment mixing cavity 15, concretely, the jet entrainment jet head group 14 is composed of a plurality of jet entrainment jet heads, cooling water enters the jet entrainment jet head group 14 through the cooling water pipeline 18 and entrains the cooling water jet incident flow into the jet entrainment mixing cavity 15 in a jet flow mode, more specifically, the jet entrainment mixing cavity 15 is directly connected in series on the vacuum pumping pipeline 17, the jet entrainment jet head group 14 forms an entrainment effect when the cooling water jet incident flow is entrained and absorbed into the jet mixing cavity 15, and the entrainment effect sucks the gas-steam mixture composed of water vapor and non-condensable gas in the vacuum-pumping pipeline 17 into the jet entrainment mixing cavity 15 in the radial direction, the special output pipeline 16 discharges the gas-steam mixture formed in the jet entrainment mixing cavity 15, and the gas-steam mixture is composed of the non-condensable gas with reduced temperature, the water vapor with reduced temperature, cooling water and condensed water generated by condensing the water vapor.

Wherein, change on the lateral wall of moisturizing pipeline 4 and be connected with respectively and change moisturizing pipeline electric regulating valve 11 and change moisturizing flow 12, change moisturizing pipeline electric regulating valve 11 and carry out the intelligent PID automatically regulated based on model prediction to changing moisturizing flow 12, and change moisturizing pipeline electric regulating valve 11 and change moisturizing flow 12 and all be connected with outside automatic control system electricity.

Wherein, be provided with the noncondensable gas import 6 of being connected with special output pipeline 16 on the lateral wall of noncondensable gas knockout 2, be provided with noncondensable gas export 7 on the lateral wall of noncondensable gas knockout 2, and the outside of noncondensable gas export 7 is connected with goes vacuum pumping equipment pipeline 8, be connected with hot water outlet 9 on the lateral wall of noncondensable gas knockout 2, and hot water outlet 9 sends into outside condenser hot-well pipeline 10 through gas-liquid secondary separator 3 the moisturizing of intensification and vapor by the water of condensation, the moisturizing of intensification, vapor is by the water of condensation, power steam is by the water homoenergetic realization recycle of condensation.

The invention is characterized by further improvement:

the injection device is easier to design, manufacture and control than conventional mixing equipment and can achieve better mixing conditions with lower energy consumption. In practical application, besides the common plane and axisymmetric jet, the three-dimensional free jet and the three-dimensional wall jet emitted by nozzles such as square, rectangular, oval and triangular nozzles exist. Jet entrainment plays an important role in both mixing in turbulent flow fields and combustion in gas turbine combustors.

The computational fluid mechanics method has the characteristics of small investment, easy improvement of precision and the like, and is an effective method for researching fluid flow. The jet flow and entrainment characteristics for the 5-shaped nozzles, circular, oval, square, cross, triangular, were not systematically compared. The invention adopts an RNGk-epsilon model to carry out numerical simulation on the 5 kinds of nozzles, and compares the jet flow and entrainment characteristics of the nozzles with different shapes by analyzing the axial jet velocity attenuation, the jet penetration depth, the velocity half-value width and the entrainment rate distribution of the nozzles with different shapes.

1. Numerical model

1.1 physical model

The instantaneous variables in the continuity and momentum equation are written into the following tensor forms under a Cartesian coordinate system after Reynolds averaging:

to close equation (2), the Boussinesq assumption is used to determine the Reynolds stressSimulations were performed, considering that reynolds stress is proportional to the mean velocity gradient:

the equation of the turbulent kinetic energy and the dissipation rate in the reforming group k-epsilon model satisfies the following conditions:

1.2 geometric model construction

In order to better verify the correctness of the numerical model, specific model parameters are shown in fig. 3. The length × width × height of the feature model size is 2500mm × 400mm × 600mm, and the height of the nozzle position from the bottom surface is 250 mm. The fluid outlet 100mm multiplied by 400mm above the right side wall surface of the rectangular water tank is a free outlet. The diameter of the circular nozzle is 15mm or 10mm, and the accuracy of the numerical model is verified by comparing the simulation data of the circular nozzle with the diameter of 15mm and the diameter of 4.50m/s of U0.

On the premise that the flow rate of an injection port and the area of the nozzle are the same, the 5-axis symmetric nozzle shown in fig. 4 is selected, and entrainment characteristics of static fluid injected at 6 different outlet speeds of 0.65, 1.10, 2.13, 3.29, 4.11 and 4.50m/s are studied, wherein the fluid working medium of jet flow is water, and the density rho is 998kg/m 3.

1.3 turbulence model selection

The round nozzle model with the D being 15mm and the U0 being 4.50m/s is simulated and calculated by adopting 4 different turbulence models, the axial speeds of the 4 different turbulence models at the position where the z-z0 being 21cm are shown in fig. 5, and it can be seen that the axial speeds obtained by adopting the numerical simulation of RNGk-epsilon are the closest to the experimental values, and the errors of the maximum axial speeds calculated by the 4 different numerical standard k-epsilon, RNGk-epsilon, SSTK-omega and the standard k-omega model from the experimental values are 67.5%, 5.75%, 53.8% and 57.7% respectively. Errors of other axial position RNGk-epsilon models and experimental values are small, and the RNGk-epsilon model is suitable for processing high strain rate and flow with large streamline bending degree, so that the RNGk-epsilon model is selected in the work.

1.4 grid validation

The grid density degree has certain influence on the precision and the calculation time of the numerical simulation, but for a given specific problem, when the grid density reaches a certain degree, the influence on the result can be ignored, and the calculation time can be prolonged by further grid encryption. In order to make the research more accurate, the invention carries out grid refinement on a cuboid region with the length multiplied by the width multiplied by the height multiplied by 600mm multiplied by 200mm in front of the nozzle, respectively carries out RNGk-epsilon numerical simulation on 3 grid models with different accuracies and grid sizes of 4, 5 and 6mm, and the corresponding grid number and grid torsion rate are 2633161, 1103114, 786003 and 0.7725, 0.7726 and 0.7854 respectively, thereby meeting the grid quality requirement. FIG. 6 shows the jet axial velocity distribution obtained by RNGk-epsilon model simulation under 3 different grid accuracies. As can be seen from the figure, the results of the grid sizes of 5mm and 6mm are close, and the maximum error with the result of the grid size of 4mm is 3.85% and 10.56%, respectively.

When the device is used, the pipeline 5 of the vacuum pumping equipment is connected with the outlet of the condenser, the chemical water supplement from the chemical water supplement pipeline 4 is dynamically and fully mixed with the gas-steam mixture from the condenser in the high-efficiency jet entrainment mechanism 1 to be cooled, the water steam is continuously condensed to be reduced, so that the composition of the gas-steam mixture in the vacuum pumping pipeline is changed, and the content of non-condensable gas is increased. After passing through the non-condensable gas separator 2, the non-condensable gas with changed components enters a vacuum pumping equipment pipeline 5 and is pumped away by subsequent vacuum pumping equipment, and the heated chemical water supplement and the water with condensed steam are sent into a condenser hot well pipeline 10 through a hot water outlet 9 and a gas-liquid secondary separator 3.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.