Enhanced jet type steam absorption and revaporization device

Abstract

The utility model relates to the technical field of steam exhaust recycling and reusing and steam compression, in particular to an enhanced jet type steam absorbing and revaporizing device which mainly comprises a first ejector (1), a second ejector (4), an anti-cavitation pump set (3) and a steam-water separator (5). The steam-water separator, the anti-cavitation pump set, the first ejector and the second ejector are sequentially communicated to form a circulating system, and an ejection opening of the first ejector is communicated with the steam inlet (2); and the steam-water separator is provided with a steam outlet. The utility model relates to a steam exhaust recycling and steam compression technology for firstly mixing steam and liquid and then vaporizing, and is mainly applied to steam pressurization of an air energy heat pump steam engine and steam recycling of a factory distillation process.

Description

Technical Field

[0001] The utility model relates to the technical field of steam exhaust steam recovery and reuse and steam compression, in particular to an enhanced jet type steam absorption and re-vaporization device. Background Art

[0002] The existing steam exhaust steam recovery and reuse equipment mainly includes steam compressors and steam jet pumps. Steam compressors directly use electric motors to drive impellers, screws or rotors to directly compress steam. The equipment cost of steam compressors is relatively high. The compression process produces condensed water and superheated steam, which requires water spraying for cooling. In addition, due to the large compression ratio, the temperature rise of one compression is small, and the application range is relatively narrow. Steam jet pumps require a high-pressure steam source, and inject high-pressure steam to inhale low-pressure steam and output medium-pressure steam.

[0003] The more advanced exhaust steam recovery and reuse technology currently available is "A jet steam compressor" with application number 202223450599.8. This technology adopts the concept of mixing steam and liquid first and then vaporizing, using a water vapor ejector to absorb steam, and then vaporizing it using a steam-water separator. Since the system absorbs low-pressure steam and outputs medium- and high-pressure steam, the back pressure at the ejector outlet is relatively high, and the effect of the ejector absorbing steam needs to be improved.

[0004] The utility model aims to solve the problem that the efficiency of steam absorption is not high enough due to the high back pressure of the ejector, to manufacture an enhanced ejector type steam absorption and re-vaporization device, to reduce the negative influence of the back pressure and to improve the working efficiency of the machine. Utility Model Content

[0005] The utility model is realized as follows: an enhanced jet-type steam absorption and re-vaporization device, mainly comprising a first ejector (1), a second ejector (4), an anti-cavitation pump group (3), and a steam-water separator (5), wherein the steam-water separator, the anti-cavitation pump group, the first ejector and the second ejector are connected in sequence to form a circulation system, wherein the ejection inlet (1.3) of the first ejector and the ejection inlet (4.3) of the second ejector are respectively directly connected to the water outlet of the anti-cavitation pump group or connected through a pipeline, the outlet (1.1) of the first ejector is directly connected to the ejection inlet (4.2) of the second ejector or connected through a pipeline, the outlet (4.1) of the second ejector is directly connected to the inlet (5.1) of the steam-water separator or connected through a pipeline, and the water outlet of the steam-water separator is directly connected to the inlet of the anti-cavitation pump group or connected through a pipeline; the ejection inlet (1.2) of the first ejector is connected to the steam inlet (2); and the steam-water separator is provided with a steam outlet (5.5).

[0006] The anti-cavitation pump groups include one or more groups, and two or more groups of anti-cavitation pump groups are connected in parallel.

[0007] The anti-cavitation pump group is composed of a booster pump and a pre-pump, or the anti-cavitation pump group is a booster pump with an inducer, or the anti-cavitation pump group is composed of a water pump and a water-water ejector, the water outlet pipe of the water pump branches out a return pipe connected to the injection port of the water-water ejector, the outlet of the water-water ejector is connected to the inlet of the water pump, and the injection port of the water-water ejector is the water inlet of the pump group, or the anti-cavitation pump group is composed of a water pump, a return pipe and a tee, one end of the return pipe is connected to the water outlet of the water pump, and the other end is connected to the tee, and the other two interfaces of the tee are respectively connected to the water inlet of the water pump and the water inlet of the pump group. The return pipe is connected to the water inlet pipe of the booster pump by a tee, one inlet of the tee is connected to the water outlet of the steam-water separator, and the return pipe and the tee are used to replace the water-water ejector, and the diameter of the return pipe is smaller than the diameter of the tee, which is only about 1 / 5 of the diameter of the tee. The water-water ejector is arranged outside the steam-water separator, or the water-water ejector is arranged inside the steam-water separator. When the water-water ejector is arranged inside the steam-water separator, the ejection port of the water-water ejector is the water outlet (5.7) of the steam-water separator.

[0008] Each anti-cavitation pump group has one or more booster pumps, and two or more booster pumps are connected in series or in parallel. Series connection can increase the pump head, and parallel connection can increase the pump flow rate. Booster pumps usually use high-temperature pumps with a temperature resistance of about 180 degrees. Since the back pressure of the water vapor ejector should not exceed 0.5, a high-temperature booster pump with a large head is generally used. In the anti-cavitation pump group composed of a booster pump and a pre-pump, there is one or more pre-pumps, and two or more pre-pumps are connected in parallel. Multiple pre-pumps in parallel can increase the flow rate, reduce the flow rate, and enhance the anti-cavitation ability. The pre-pump is a low-speed pump relative to the booster pump, and the booster pump is a high-speed pump relative to the pre-pump. Usually, the pre-pump uses a water pump with a head of less than 40 meters, and the booster pump uses a water pump with a head of more than 40 meters. The function of the pre-pump is to increase the pressure head of the inlet water flow of the booster pump to prevent cavitation in the booster pump. The pre-pump should be a low-speed, high-flow water pump to prevent cavitation of the pre-pump itself. The pre-pump can be a double-suction single-stage centrifugal pump or two sets of parallel single-suction single-stage centrifugal pumps. Of course, vortex pumps, cross-flow pumps, etc. can also be used.

[0009] Furthermore, two pressure detection units are provided in the anti-cavitation pump group, one of which is provided at the suction port of the water pump, and the other is provided at the steam-water separator. By comparing the difference between the signals detected by the two detection units, the cavitation margin is analyzed and transmitted to the cavitation protection control system, and the water pump is tripped to enter the cavitation protection state control mode.

[0010] The ejector is provided with an injection inlet, an ejection port and an outlet, and is designed and manufactured according to the Venturi tube principle and the Lafarge nozzle principle. The injection inlet of the first ejector is water, the ejection port is steam, and the outlet is water or a mixture of steam and water. Usually, 1 cubic meter of water can eject 5 cubic meters of steam. The injection inlet of the second ejector is water, the ejection port is water or a mixture of steam and water, and the outlet is water or a mixture of steam and water. The ejector is provided with a contraction section and an expansion section. The fluid will accelerate when entering the contraction section, and will continue to accelerate when entering the expansion section, forming a negative pressure at the ejection port, sucking the fluid at the ejection port in, thereby achieving fluid mixing. The fluid first accelerates in the expansion section and then decelerates, converting kinetic energy into static pressure energy, forming a medium-pressure output at the outlet.

[0011] There are one or more first ejectors, two or more first ejectors are connected in parallel, and the first ejectors are single-channel ejectors or multi-channel ejectors. There are one or more second ejectors, two or more second ejectors are connected in parallel, and the second ejectors are single-channel ejectors or multi-channel ejectors. A single-channel ejector has only one injection inlet, one ejection port and one outlet, and a multi-channel ejector is a multi-channel ejector that combines multiple single-channel ejectors into one, in order to increase the flow rate of the soda-water mixture.

[0012] The device is provided with a water supply pipe and / or a drainage pipe, or a water supply-drainage pipe. The water supply pipe is connected to the steam-water separator, or the water supply pipe is connected to the pipeline between the water outlet of the steam-water separator and the water inlet of the anti-cavitation pump group; the water supply pipe is provided with a water supply joint (8) and a one-way valve (6); a solenoid valve (7) and / or a water supply pump are provided between the one-way valve and the water supply joint. The one-way valve allows water to flow in from the water supply joint and prevents water from flowing out from the water supply joint. Before starting the machine, water must be supplied to a specified water level to prevent the water pump from running idle due to lack of water. The machine can be supplied with water by relying on the pressure of tap water, or by a water supply pump. The drainage pipe is provided on the pipeline between the water outlet of the steam-water separator and the inlet of the front pump, and a drainage valve (9) is provided on the drainage pipe; the drainage valve is an electric drainage valve or a manual drainage valve. Possible locations for connecting the drain pipe include the pipeline between the outlet of the anti-cavitation pump group and the inlet of the first ejector, the pipeline between the outlet of the pre-pump and the inlet of the booster pump, and the pipeline between the water outlet of the water separator and the inlet of the pre-pump. The drain valve has the function of draining water and sewage. When the water level of the water separator is too high, it can be drained through the drain pipe to control the water level. The drain pipe and the water supply pipe are combined into a water supply-drain pipe. The water supply-drain pipe can flow in both directions and no one-way valve is provided. The water supply-drain pipe is generally controlled by an electric valve or a pneumatic valve. The water supply pipe and the drain pipe are often connected to the water outlet of the water separator through a pipe. At this time, the water outlet of the water separator actually bears the dual functions of water outlet and water inlet at the same time, that is, the water inlet and outlet of the water separator are combined into one water inlet and outlet.

[0013] The system can output both high-temperature steam and hot water. If hot water is needed, water can be added through the water supply pipe, mixed with steam and discharged through the drain pipe for production and life use. Therefore, the jet steam absorption and re-vaporization device has the dual functions of steam production and hot water production. The drain valve can also add flow regulation function as needed.

[0014] A filter or a PH neutralizer is installed in the steam-water separator or in the pipeline between the water outlet of the steam-water separator and the anti-cavitation pump group. The filter and the PH neutralizer are optional components. When the connected steam is chemically contaminated, the filter and the PH neutralizer are required to prevent corrosion of the water pump and other components.

[0015] The steam-water separator is provided with a water level detector (5.4) or a mechanical water level controller. The water level detector is fixed on the upper cover (5.3) or the side of the steam-water separator. First, water is added to the steam-water separator by a water supply pump, and the water supply is stopped when the predetermined water level is detected. When the water volume is insufficient and reaches the lower limit of the water level, the water is refilled to the predetermined water level. The water level detector is a water level probe or other types of detectors. The water level detector can detect one water level or multiple water levels at the same time. Preferably, the water level detector is a water level probe. The mechanical water level controller is a float valve type water level controller, which automatically controls the water level of the steam-water separator in a mechanical manner.

[0016] The steam-water separator is provided with one or more inlets, and the number of the inlets is the same as the number of the second ejector. The inlet specifically refers to the steam-water separator inlet connected to the outlet of the second ejector.

[0017] The steam-water separator mainly includes a tank body, an inlet (5.1), a steam outlet (5.5), a water outlet, and a water inlet. A baffle (5.2) or a spiral blade may be arranged in the tank body as required, or a baffle or a spiral blade may not be arranged. The steam-water separator may be divided into several types according to the type, such as a baffle type, a cyclone type, an adsorption type, and a combined type. The steam-water separator may also be made into a hollow flash tank, and steam-water separation is achieved by using the flash evaporation principle. The water outlet of the steam-water separator may be combined with the water inlet to form a water inlet and outlet (5.6), which has both the function of water intake and the function of water drainage. When the water level in the steam-water separator is too low and water replenishment is required, water is taken in, and when the water level in the steam-water separator is too high, water drainage is required. The inlet of the steam-water separator is arranged at the top of the tank body or one side of the upper part of the tank body, the steam outlet is arranged at the top of the tank body or one side of the upper part of the tank body, and the water outlet is arranged at the bottom. The water outlet of the steam-water separator specifically refers to the water outlet of the steam-water separator connected to the inlet of the anti-cavitation pump group. The drain outlet of the steam-water separator connected to the drain and sewage pipe is not the water outlet of the steam-water separator described in this manual, unless the drain outlet and the water outlet are combined into one outlet.

[0018] The system is equipped with a pressure sensor to control the speed or start and stop of the water pump through changes in pressure.

[0019] A one-way valve is arranged on the pipeline between the steam inlet and the ejection port of the first ejector to prevent water or steam from flowing back.

[0020] A post-pump (12) is provided on the pipeline between the outlet of the second ejector and the inlet of the steam-water separator, or no post-pump is provided; the post-pump is a single pump, or the post-pump is composed of two water pumps connected in series, or the post-pump is a water pump provided with an inducer. When the second ejector injects water at a higher pressure, the steam sucked in by the ejector will be liquefied to avoid the occurrence of cavitation. A post-pump can be provided between the outlet of the second ejector and the inlet of the steam-water separator to reduce the back pressure of the first ejector and increase the flow rate of the sucked steam. If the second ejector cannot completely liquefy the steam sucked in by the first ejector, a post-pump cannot be provided between the outlet of the second ejector and the inlet of the steam-water separator to prevent the occurrence of cavitation. A single post-pump generally uses a water pump with a head of less than 40 meters to avoid the occurrence of cavitation. The two water pumps connected in series are a combination of a low-head pump + a high-head pump, which is also to prevent the occurrence of cavitation. The purpose of providing an inducer in the water pump is also to prevent the occurrence of cavitation.

[0021] Furthermore, when a higher-lift anti-cavitation pump group is used, and the first ejector itself can completely liquefy the sucked steam, the second ejector can be removed, and a post-pump can be set on the pipeline between the outlet of the first ejector and the inlet of the steam-water separator. Reducing one ejector, a single-stage jet steam absorption and re-vaporization device is formed, which mainly includes an anti-cavitation pump group, an ejector, a post-pump, and a steam-water separator; the anti-cavitation pump group, the ejector, the post-pump and the steam-water separator are connected in sequence to form a circulation system, wherein the water outlet of the anti-cavitation pump group is directly connected to the injection port of the ejector or connected through a pipeline, the outlet of the ejector is directly connected to the water inlet of the post-pump or connected through a pipeline, the water outlet of the post-pump is directly connected to the inlet of the steam-water separator or connected through a pipeline, and the water inlet and outlet of the steam-water separator are directly connected to the inlet of the anti-cavitation pump group or connected through a pipeline; the ejection port of the ejector is connected to the steam inlet; and the steam-water separator is provided with a steam outlet. The purpose of arranging a post-pump between the outlet of the ejector and the inlet of the steam-water separator is to eliminate part of the back pressure of the ejector and improve the steam suction efficiency of the ejector. The post-pump is a low-lift water pump or an anti-cavitation pump group, the anti-cavitation pump group is a water pump with an inducer, or the anti-cavitation pump group is a combination of two water pumps connected in series to prevent the generation of cavitation.

[0022] Steam boosting principle: Use an anti-cavitation pump group to generate a high-speed water flow and spray it from the injection port of the first ejector. Negative pressure is generated at the ejector port to suck in low-pressure steam. The mixture of steam and water is ejected from the expansion section of the ejector tube at high speed, and then gradually decelerates to convert kinetic energy into static pressure energy. Part or all of the steam is liquefied and becomes medium-pressure hot water or a steam-water mixture, and then sprayed into the steam-water separator for steam-water separation. As the steam flow rate sprayed into the steam-water separator increases, the pressure in the tank rises accordingly. By adjusting the flow rate of the steam outlet of the steam-water separator, the required medium-pressure steam is obtained to achieve the purpose of inhaling low-pressure steam, re-vaporizing and boosting. The process of steam boosting is a process of first liquid mixing and then vaporizing.

[0023] During the boosting process, the mechanical energy of the boosting pump will be converted into thermal energy, which can provide part of the thermal energy for steam heating. However, the increase in steam temperature and steam pressure are not completely synchronized. Insufficient heat may cause part of the steam to liquefy. Therefore, while boosting, the steam must be heated or part of the condensed water must be discharged to keep the water level in the steam-water separator within the set range.

[0024] Optionally, the enhanced jet steam absorption and re-vaporization device is provided with a heating device. The device is provided with a heater, which is arranged on the pipeline between the outlet of the first ejector and the inlet of the steam-water separator, or the heater is arranged in the steam-water separator, or the heater is arranged on the pipeline between the steam inlet and the first ejector; the heater is an electromagnetic heater, an electric heating rod heater, a gas heater, or a fuel oil heater.

[0025] The heater is an electromagnetic heater, an electric heating rod heater, a gas heater or a fuel oil heater. The electromagnetic heater is mainly composed of a circuit board, a coil and a metal tube, and uses the electromagnetic induction principle for indirect heating. The electric heating rod heater is mainly composed of a circuit board and a heating tube, and uses the heating tube to directly heat the hot water. The gas heater and the fuel oil heater are mainly composed of a burner, a heat exchanger and a controller.

[0026] The optional accessories at the steam outlet of the steam-water separator include pressure gauge, pressure switch, wafer-type check valve, flange hose, flow regulator, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model

[0028] Figure 2 This is a schematic diagram of the structure of the second embodiment of the utility model

[0029] Figure 3 This is a schematic diagram of the structure of the third embodiment of the utility model

[0030] Figure 4 This is a schematic diagram of the structure of the fourth embodiment of the utility model

[0031] Figure 5 This is a schematic diagram of the structure of the fifth embodiment of the utility model DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings.

[0033] First embodiment

[0034] See also Figure 1 , an enhanced jet-type steam absorption and re-vaporization device, mainly comprising a first ejector (1), a second ejector (4), an anti-cavitation pump group (3), and a steam-water separator (5). The steam-water separator, the anti-cavitation pump group, the first ejector, and the second ejector are connected in sequence to form a circulation system, wherein the water outlet pipe of the anti-cavitation pump group is divided into two water paths, one water path is connected to the ejection port (1.3) of the first ejector, and the other water path is connected to the ejection port (4.3) of the second ejector, the outlet (1.1) of the first ejector is connected to the ejection port (4.2) of the second ejector through a pipeline, the outlet (4.1) of the second ejector is connected to the inlet (5.1) of the steam-water separator through a pipeline, and the water inlet and outlet (5.6) of the steam-water separator is connected to the inlet of the anti-cavitation pump group through a pipeline; the ejection port (1.2) of the first ejector is connected to the steam inlet (2), and a one-way valve is provided on the connecting pipe; the steam-water separator is provided with a steam outlet (5.5). The dotted frame is an anti-cavitation pump group, which consists of a booster pump and a pre-pump. The pre-pump is a high-temperature water pump with a head of less than 40 meters and a temperature resistance of 180 degrees. The booster pump is a high-temperature pump with a head of more than 100 meters and a temperature resistance of 180 degrees. The steam-water separator is provided with a partition (5.2), a water level detector (5.4) and a pressure sensor. These three components are fixed on the upper cover (5.3) of the steam-water separator. A steam outlet is provided on one side of the upper part of the steam-water separator, and a wafer-type check valve is provided on the steam outlet. A water supply pipe is provided on the pipeline between the water inlet and outlet of the steam-water separator and the anti-cavitation pump group. The water supply pipe is provided with a water supply joint (8) and a one-way valve (6); a solenoid valve (7) is provided on the pipeline between the one-way valve and the water supply joint. A drain pipe is connected to the pipeline between the water inlet and outlet of the steam-water separator and the inlet of the anti-cavitation pump group. An electric drain valve (9) is provided on the drain pipe. The water inlet and outlet of the steam-water separator are the water outlet and the water inlet combined into one water inlet and outlet.

[0035] Second embodiment

[0036] See also Figure 2, an enhanced jet-type steam absorption and re-vaporization device, mainly comprising a first multi-channel ejector (10), a second multi-channel ejector (11), an anti-cavitation pump group (3), a steam-water separator (5) and a post-pump (12). The anti-cavitation pump group is composed of a water-water ejector (3.3) and two sets of parallel booster pumps (3.1) + a pre-pump (3.2), and the outlets of the two parallel pump groups are respectively connected to the injection port of the first multi-channel ejector and the injection port of the second multi-channel ejector through pipelines. A post-pump is arranged on the pipeline between the outlet of the second multi-channel ejector and the inlet (5.1) of the steam-water separator. Since the water-water ejector can eliminate cavitation, the pre-pump can also use a high-lift water pump. The remaining parts not described are the same as the first embodiment and will not be repeated.

[0037] Third embodiment

[0038] See also Figure 3 , an enhanced jet steam absorption and re-vaporization device, mainly comprising a first ejector (1), a second ejector (4), an anti-cavitation pump group (3), a steam-water separator (5), and a post-pump (12). The anti-cavitation pump group is composed of a water-water ejector and two parallel booster pumps, and the water outlet pipes of the two booster pumps are respectively connected to the injection port of the first ejector and the injection port of the second ejector. The water-water ejector is arranged inside the steam-water separator, and the ejection port of the water-water ejector is a water outlet of the steam-water separator. The injection port and the outlet of the water-water ejector are respectively arranged on both sides of the bottom of the steam-water separator. A post-pump is arranged on the pipeline between the outlet of the second ejector and the inlet of the steam-water separator. The remaining parts not described are the same as those of the first embodiment and will not be repeated.

[0039] Fourth embodiment

[0040] See also Figure 4 A steam absorption and re-vaporization device with a heating device mainly comprises a first ejector (1), a second ejector (4), an anti-cavitation pump group (3), a steam-water separator (5), and a heater (13). There are two parallel first ejectors, two parallel second ejectors, and two parallel anti-cavitation pump groups. The steam-water separator has two inlets respectively connected to the two parallel second ejectors. The steam inlet and the ejection ports of the two parallel first ejectors are connected by a tee. An electric heater is provided in the steam-water separator. When the water level in the steam-water separator is too high, the water is heated to vaporize a part of the water. The remaining parts not described are the same as those in the first embodiment and will not be repeated.

[0041] Fifth embodiment

[0042] See also Figure 5A single-stage jet steam absorption and regasification device mainly comprises a first ejector (1), an anti-cavitation pump group (3), a steam-water separator (5) and a post-pump (12). The second ejector is eliminated, and a low-lift post-pump is provided between the outlet of the first ejector and the inlet of the steam-water separator. The remaining parts not described are the same as those of the first embodiment and will not be repeated.

Claims

1. An enhanced jet-type steam absorption and re-vaporization device, mainly comprising a first ejector (1), a second ejector (4), an anti-cavitation pump group (3), and a steam-water separator (5), characterized in that: The steam-water separator, the anti-cavitation pump group, the first ejector and the second ejector are connected in sequence to form a circulation system, wherein the ejection inlet (1.3) of the first ejector and the ejection inlet (4.3) of the second ejector are respectively directly connected to the water outlet of the anti-cavitation pump group or connected through a pipeline, the outlet (1.1) of the first ejector is directly connected to the ejection inlet (4.2) of the second ejector or connected through a pipeline, the outlet (4.1) of the second ejector is directly connected to the inlet (5.1) of the steam-water separator or connected through a pipeline, and the water outlet of the steam-water separator is directly connected to the inlet of the anti-cavitation pump group or connected through a pipeline; the ejection inlet (1.2) of the first ejector is connected to the steam inlet (2); and the steam-water separator is provided with a steam outlet (5.5).

2. The enhanced jet steam absorption and revaporization device according to claim 1, characterized in that: The anti-cavitation pump groups include one or more groups, and two or more groups of anti-cavitation pump groups are connected in parallel.

3. The enhanced jet steam absorption and re-vaporization device according to claim 1, characterized in that: The anti-cavitation pump group is composed of a booster pump and a pre-pump, or the anti-cavitation pump group is a booster pump provided with an inducer, or the anti-cavitation pump group is composed of a water pump and a water-water ejector, a water outlet pipe of the water pump branches out a return water pipe connected to the injection port of the water-water ejector, the outlet of the water-water ejector is connected to the inlet of the water pump, the injection port of the water-water ejector is the water inlet of the pump group, or the anti-cavitation pump group is composed of a water pump, a return water pipe and a tee, one end of the return water pipe is connected to the water outlet of the water pump, and the other end is connected to the tee, and the other two interfaces of the tee are respectively connected to the water inlet of the water pump and the water inlet of the pump group.

4. The enhanced jet steam absorption and re-vaporization device according to claim 1, characterized in that: There are one or more first ejectors, and two or more first ejectors are connected in parallel, and the first ejector is a single-channel ejector or a multi-channel ejector; there are one or more second ejectors, and two or more second ejectors are connected in parallel, and the second ejector is a single-channel ejector or a multi-channel ejector.

5. The enhanced jet steam absorption and revaporization device according to claim 1, characterized in that: A water supply pipe and / or a drainage pipe are provided in the device, or a water supply-drainage pipe is provided in the device.

6. The enhanced jet steam absorption and revaporization device according to claim 1, characterized in that: The steam-water separator is provided with a water level detector (5.4) or a mechanical water level controller.

7. The enhanced jet steam absorption and re-vaporization device according to claim 1, characterized in that: A post-pump (12) is provided on the pipeline between the outlet of the second ejector and the inlet of the steam-water separator, or no post-pump is provided; the post-pump is a single pump, or the post-pump is composed of two water pumps connected in series, or the post-pump is a water pump provided with an inducer.

8. The enhanced jet steam absorption and revaporization device according to claim 1, characterized in that: A heater is provided in the device, and the heater is arranged on the pipeline between the outlet of the first ejector and the inlet of the steam-water separator, or the heater is arranged in the steam-water separator, or the heater is arranged on the pipeline between the steam inlet and the first ejector; the heater is an electromagnetic heater, an electric heating rod heater, a gas heater, or a fuel oil heater.

9. The enhanced jet steam absorption and re-vaporization device according to claim 1, characterized in that: One ejector is reduced to form a single-stage jet steam absorption and re-vaporization device, which mainly includes an anti-cavitation pump group, an ejector, a post-pump, and a steam-water separator; the anti-cavitation pump group, the ejector, the post-pump and the steam-water separator are connected in sequence to form a circulation system, wherein the water outlet of the anti-cavitation pump group is directly connected to the injection port of the ejector or connected through a pipeline, the outlet of the ejector is directly connected to the water inlet of the post-pump or connected through a pipeline, the water outlet of the post-pump is directly connected to the inlet of the steam-water separator or connected through a pipeline, and the water inlet and outlet of the steam-water separator are directly connected to the inlet of the anti-cavitation pump group or connected through a pipeline; the ejector port is connected to the steam inlet; and the steam-water separator is provided with a steam outlet.

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