A liquid spray condensing system for an ammonia water cycle power generation system

Abstract

The embodiment of the present application provides a kind of liquid spray condensing system of ammonia circulating power generation system.The system includes liquid storage tank, working medium pump, spray section, condenser and control valve.By spraying low concentration liquid ammonia into high concentration ammonia vapor, the ammonia concentration is reduced, the condensing effect is ensured, the ammonia vapor is prevented from entering the liquid storage tank, the system back pressure is reduced and the system efficiency is improved.The present application only needs to be simply modified to realize the function of the original Kalina cycle power generation system, and the structure is simple and easy to implement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste heat power generation, and particularly relates to a liquid spraying condensing system of an ammonia water circulating power generation system. BACKGROUND

[0002] In production and life, there are many heat energies which are not fully utilized and are discharged into the environment, such as flue gas, water vapor, hot water and the like, wherein the energy contained can be recovered and converted into electric energy through a waste heat power generation system. The technology used by the waste heat power generation system includes an organic Rankine cycle, a Kalina cycle, a Brayton cycle and the like, wherein the Kalina cycle is to realize waste heat recovery by using an ammonia water mixture as a medium.

[0003] In the Kalina cycle power generation system, liquid ammonia water medium is stored in a liquid storage tank, and the liquid ammonia water is sent into various heat exchangers through a working medium pump to be evaporated by absorbing heat, wherein the heat exchangers include a regenerator, an evaporator and the like. After the heat energy of the heat source is absorbed by the various heat exchangers, ammonia water steam with a certain dryness is formed, the ammonia water steam is separated in a separator, and is separated into gaseous saturated ammonia water steam and liquid lean ammonia solution. The gaseous saturated ammonia water steam enters a turbine power generation device to complete power generation, and forms low-temperature and low-pressure exhaust steam, the exhaust steam still has a certain heat with the lean ammonia solution, the exhaust steam and the lean ammonia solution are mixed in a mixer, the heat energy is recovered through the regenerator and is returned to the system, finally, the ammonia water steam enters a condenser, is re-condensed into liquid by cooling water, and returns to the liquid storage tank, thereby completing the entire cycle process.

[0004] In the above Kalina cycle power generation system, the ammonia water steam is separated and re-mixed, in theory, under the stable running state of the system, the concentration of the re-mixed ammonia water steam remains unchanged, and the re-mixed ammonia water steam can be effectively condensed into liquid by the cooling water, but in the actual running process, the concentration of the ammonia water steam is often affected by many factors such as the temperature of the heat source, load change, separation effect and the like, thereby causing the concentration of the ammonia water steam entering the condenser to change. When the concentration of the ammonia water steam entering the condenser is too high, the high-concentration ammonia water needs a lower temperature to be condensed into liquid, at this time, the cooling water is not enough to condense the ammonia water steam into liquid, and the high-concentration ammonia water steam enters the ammonia water storage tank and accumulates, thereby causing the back pressure of the entire system to significantly rise and reducing the system efficiency. SUMMARY

[0005] The present application aims to provide a liquid spraying condensing system suitable for an ammonia water circulating power generation system, so as to solve the problem of the rise of the system back pressure caused by the concentration change of the ammonia water due to unstable factors in the system.

[0006] The present application provides a liquid spraying condensing system of an ammonia water circulating power generation system, comprising a liquid storage tank, a working medium pump, a spraying section, a condenser and a control valve.

[0007] The liquid storage tank is used to store ammonia water base liquid.

[0008] The working medium pump is used for extracting the ammonia water-based liquid from the liquid storage tank and pressurizedly conveying the ammonia water-based liquid through the ammonia water-based liquid pipeline.

[0009] The condenser is used for condensing the ammonia water vapor.

[0010] The liquid storage tank, the working medium pump and the condenser are connected through pipelines.

[0011] A spraying main pipeline is arranged on the ammonia water-based liquid pipeline, and is used for connecting the spraying section and providing the spraying section with the ammonia water-based liquid.

[0012] The control valve is arranged on the liquid spraying main pipeline, and is used for adjusting the ammonia water-based liquid flow.

[0013] The spraying section is arranged on the ammonia water vapor inlet pipeline of the condenser, and comprises a main vapor pipeline, a plurality of nozzles and a liquid conveying pipeline connected with the nozzles, and is used for atomizing and spraying the ammonia water-based liquid into the ammonia water vapor.

[0014] In some embodiments, the liquid conveying pipeline comprises a liquid spraying capillary corresponding to each nozzle, the nozzle is connected with the liquid spraying main pipeline through the liquid spraying capillary, the liquid spraying main pipeline is branched to each liquid spraying capillary, and the ammonia water-based liquid is atomized and sprayed into the ammonia water vapor through the nozzle.

[0015] In some embodiments, the liquid spraying main pipeline is provided with a stop valve at the first end and the last end.

[0016] In some embodiments, the main vapor pipeline of the spraying section is consistent in specification with the ammonia water vapor inlet pipeline of the condenser.

[0017] In some embodiments, the spraying section arranged on the ammonia water vapor inlet pipeline of the condenser comprises:

[0018] The spraying section is arranged on a downcomer or a horizontal pipeline.

[0019] In some embodiments, the spraying direction of the nozzle in the spraying section is consistent with the airflow direction.

[0020] In some embodiments, a pressure transmitter and a flow meter are arranged on the liquid spraying main pipeline, and the pressure transmitter and the flow meter are used for monitoring the pressure and flow parameters of the ammonia water-based liquid.

[0021] In some embodiments, the pressure transmitter and the flow meter are arranged between the control valve and the spraying section.

[0022] In some embodiments, the control valve used for adjusting the ammonia water-based liquid flow comprises: the control valve used for manually or automatically controlling the ammonia water-based liquid flow.

[0023] In some embodiments, the ammonia water vapor and the liquid ammonia water sprayed by the nozzle are mixed through a pipeline and then enter the condenser together, are condensed into liquid by the cooling water, and flow back to the liquid storage tank.

[0024] The liquid spraying condensing system of the ammonia water circulating power generation system in the above embodiments of the present application sprays low-concentration liquid ammonia water into high-concentration ammonia water vapor, thereby reducing the ammonia concentration, ensuring the condensing effect, preventing ammonia water vapor from entering the liquid storage tank, reducing the system back pressure, and improving the system efficiency. Moreover, the present application only needs to be simply modified from the original Kalina cycle power generation system to realize the function, and has a simple structure and is easy to implement. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are included to provide a further understanding of the various embodiments discussed herein and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the principles of the present application.

[0026] Figure 1 FIG. 1 is a structural schematic diagram of a liquid spraying condensing system of an ammonia water circulating power generation system according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to enable a person skilled in the art to have a better understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings, and the accompanying drawings are only used for reference and do not limit the embodiments of the present application.

[0028] In the description of the embodiments of the present application, it should be noted that unless otherwise stated and limited, the term "connection" should be understood broadly, for example, it can be an electrical connection, or a connection between two elements, or a direct connection, or an indirect connection through an intermediate medium. For a person skilled in the art, the specific meaning of the above-mentioned term can be understood according to the specific situation.

[0029] It should be noted that the terms "first", "second", "third" involved in the embodiments of the present application are only to distinguish similar objects, and do not represent a specific order of the objects. Understandably, "first", "second", "third" can be interchanged in a specific order or sequence as allowed. It should be understood that the objects distinguished by "first", "second", "third" can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0030] The liquid spraying condensing system of the ammonia water circulating power generation system according to an embodiment of the present application is applied to a Kalina cycle system using ammonia water as a medium, and is a system for spraying normal-temperature liquid ammonia water into ammonia water vapor to condense the ammonia water vapor into liquid.

[0031] The liquid spraying condensing system of the ammonia water circulating power generation system according to an embodiment of the present application is applied to a Kalina cycle system using ammonia water as a medium, and is a system for spraying normal-temperature liquid ammonia water into ammonia water vapor to condense the ammonia water vapor into liquid.Figure 1 As shown, the system comprises: a liquid storage tank 1, a working medium pump 2, a spraying section 4, a condenser 3, and a control valve 5.

[0032] The liquid storage tank 1 is used for storing ammonia water-based liquid.

[0033] The working medium pump 2 is used for extracting ammonia water-based liquid from the liquid storage tank 1 and pressurizedly delivering the ammonia water-based liquid through an ammonia water-based liquid pipeline 12.

[0034] The condenser 3 is used for condensing ammonia water vapor.

[0035] The liquid storage tank 1, the working medium pump 2, and the condenser 3 are connected through a pipeline 9.

[0036] A spraying main pipeline 11 is arranged on the ammonia water-based liquid pipeline 12, and is used for connecting the spraying section 4 and providing the spraying section 4 with ammonia water-based liquid.

[0037] The control valve 5 is installed on the spraying main pipeline 11, and is used for adjusting the flow of ammonia water-based liquid.

[0038] The spraying section 4 is installed on an ammonia water vapor inlet pipeline 16 of the condenser 3, and comprises a main vapor pipeline 13, a nozzle 14, and a liquid delivery pipeline of a liquid spraying capillary 15 connected to the nozzle 14, and is used for atomizing and spraying ammonia water-based liquid into ammonia water vapor.

[0039] In some embodiments, the liquid spraying capillary 15 corresponds to each nozzle 14, the nozzle 14 is connected to the spraying main pipeline 11 through the liquid spraying capillary 15, the spraying main pipeline 11 is branched to each liquid spraying capillary 15, and the ammonia water-based liquid is atomized and sprayed into the ammonia water vapor through the nozzle 14.

[0040] In some embodiments, the spraying main pipeline 11 is provided with a stop valve 6 at the first end and the last end.

[0041] In some embodiments, the main vapor pipeline 13 of the spraying section 4 has the same specification as the ammonia water vapor inlet pipeline 16 of the condenser 3.

[0042] In some embodiments, the spraying direction of the nozzle 14 in the spraying section 4 is consistent with the airflow direction.

[0043] In some embodiments, a pressure transmitter 7 and a flow meter 8 are arranged on the spraying main pipeline 11, and are used for monitoring the pressure and flow parameters of the ammonia water-based liquid.

[0044] In some embodiments, the pressure transmitter 7 and the flow meter 8 are arranged between the control valve 5 and the spraying section 4.

[0045] In some embodiments, the control valve 5 is used for adjusting the flow of ammonia water-based liquid, and comprises: the control valve 5 is used for manually or automatically controlling the flow of ammonia water-based liquid.

[0046] In some embodiments, the ammonia water vapor and the liquid ammonia water sprayed by the nozzle 14 are mixed through the pipeline 9, enter the condenser 3 together, are condensed into liquid by the cooling water, and flow back to the liquid storage tank 1.

[0047] The liquid spraying condensing system of the ammonia water circulating power generation system sprays low-concentration liquid ammonia water into high-concentration ammonia water vapor, thereby reducing the ammonia concentration, ensuring the condensing effect, preventing ammonia water vapor from entering the liquid storage tank, reducing the system back pressure, and improving the system efficiency.

[0048] The present application aims to provide a liquid spraying condensing system suitable for an ammonia water circulating power generation system to solve the problem of rising system back pressure caused by ammonia water concentration changes due to unstable factors in the system.

[0049] In order to achieve the above-mentioned purpose, the basic scheme of the present application is as follows:

[0050] The spraying condensing system includes a liquid storage tank, a working medium pump, a condenser and a pipeline in the original Kalina cycle power generation system, and further includes a control valve, a spraying section and a pipeline thereof.

[0051] The working medium pump extracts ammonia water working medium from the liquid storage tank and pressurizes it to be delivered to the regenerator in the Kalina cycle power generation system through the pipeline.

[0052] The control valve is located on the liquid spraying main pipeline, and the ammonia water spraying flow is adjusted through the control valve.

[0053] The spraying section is installed on the ammonia water vapor inlet pipeline of the condenser, and mainly includes a main pipeline connected with the ammonia water vapor inlet pipeline and a plurality of nozzles in the main pipeline.

[0054] The spraying section main pipeline is consistent with the ammonia water vapor inlet pipeline of the condenser to facilitate installation.

[0055] The spraying section is preferably installed in the downcomer or the horizontal pipe, and is not suitable for installation in the riser.

[0056] The number and size of the nozzles in the spraying section need to be selected and arranged according to the liquid spraying flow, and are uniformly arranged in the main pipeline of the spraying section to achieve the best atomization and absorption effect, which can effectively reduce the ammonia water vapor concentration.

[0057] The direction of the nozzles in the spraying section is consistent with the direction of the gas flow.

[0058] A pressure transmitter and a flow meter can be arranged on the spray main pipeline for monitoring and adjusting the spray flow to achieve the best spray condensing effect. The pressure transmitter and the flow meter should be arranged after the control valve.

[0059] As shown in Figure 1 The spray condensing system of the present application is composed of a liquid storage tank, a working medium pump, a spray section, a condenser, a control valve, a stop valve, a pressure transmitter, a flow meter, and pipelines.

[0060] The working medium pump extracts and provides ammonia water-based liquid from the liquid storage tank to the system.

[0061] A branch is branched off from the ammonia water-based liquid pipeline, which is the spray main pipeline, to provide the spray section with the required liquid low-concentration ammonia water.

[0062] Stop valves are arranged at the first end and the last end of the spray main pipeline to facilitate installation and inspection.

[0063] A control valve, a pressure transmitter, and a flow meter are also installed in the spray main pipeline. The control valve can be used to manually or automatically control the ammonia water flow, and the pressure transmitter and the flow meter are used to monitor the pressure and flow parameters of the ammonia water.

[0064] The spray section is installed on the ammonia water vapor inlet pipeline of the condenser, and is preferably arranged in a downcomer or a horizontal pipe.

[0065] The spray section contains several uniformly arranged nozzles, and the spray main pipeline branches out multiple capillary tubes to supply the nozzles with liquid low-concentration ammonia water.

[0066] High-concentration ammonia water vapor and low-concentration liquid ammonia water are mixed through a section of pipeline and then enter the condenser together, are condensed into liquid by cooling water, and flow back to the liquid storage tank, thereby achieving the spray condensing function of the present application.

[0067] The technical solutions described in the embodiments of the present application can be arbitrarily combined without conflict.

[0068] The above is merely specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A liquid injection condensation system for an ammonia water circulation power generation system, characterized in that, include: Storage tank, working fluid pump, spray section, condenser and control valve; The storage tank is used to store ammonia-based liquid; The working fluid pump is used to draw ammonia-based liquid from the storage tank and pressurize and transport it through the ammonia-based liquid pipeline; The condenser is used to condense ammonia water vapor; The liquid storage tank, the working fluid pump, and the condenser are connected by pipelines; A main spraying pipeline is provided on the ammonia-based liquid pipeline to connect to the spraying section and provide the spraying section with ammonia-based liquid; The control valve is installed on the main injection pipeline and is used to regulate the flow rate of the ammonia-based liquid. The spray section is installed on the ammonia vapor inlet pipe of the condenser, and includes a main steam pipe, several nozzles and a liquid delivery pipe connected to the nozzles, for atomizing and spraying ammonia-based liquid into the ammonia vapor; The infusion pipeline includes a spray capillary corresponding to each of the nozzles. The nozzles are connected to the main spray pipeline through the spray capillary. The main spray pipeline distributes the liquid to each of the spray capillary, and the ammonia liquid is atomized and sprayed into the ammonia vapor through the nozzles. Ammonia vapor and liquid ammonia water sprayed from the nozzle are mixed through the pipeline and then enter the condenser, where they are condensed into liquid by cooling water and flow back to the storage tank.

2. The liquid injection condensation system of the ammonia water circulation power generation system according to claim 1, characterized in that, The main spray pipeline is equipped with shut-off valves at both the beginning and end.

3. The liquid injection condensation system of the ammonia water circulation power generation system according to claim 1, characterized in that, The specifications of the main steam pipeline in the spray section are consistent with those of the ammonia steam inlet pipeline of the condenser.

4. The liquid injection condensation system of the ammonia water circulation power generation system according to claim 1, characterized in that, The spray section, installed on the ammonia vapor inlet pipe of the condenser, includes: The spray section is installed on a downcomer pipe or a horizontal pipe.

5. The liquid injection condensation system of the ammonia water circulation power generation system according to claim 1, characterized in that, The spray direction of the nozzles in the spray section is consistent with the airflow direction.

6. The liquid injection condensation system of the ammonia water circulation power generation system according to any one of claims 1 to 5, characterized in that, A pressure transmitter and a flow meter are installed on the main spray pipe. The pressure transmitter and the flow meter are used to monitor the pressure and flow parameters of the ammonia-based liquid.

7. The liquid injection condensation system of the ammonia water circulation power generation system according to claim 6, characterized in that, The pressure transmitter and the flow meter are arranged between the control valve and the spray section.

8. The liquid injection condensation system of the ammonia water circulation power generation system according to claim 1, characterized in that, The control valve is used to regulate the flow rate of ammonia-based liquid, including: the control valve is used to manually or automatically control the flow rate of ammonia-based liquid.

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