Liquid spraying condensation system of ammonia water circulation power generation system

Abstract

The embodiment of the invention provides a liquid spraying condensation system of an ammonia water circulation power generation system. The system comprises a liquid storage tank, a working medium pump, a spraying section, a condenser and a control valve. The low-concentration liquid ammonia water is sprayed into the high-concentration ammonia water vapor, so that the ammonia concentration is reduced, the condensation effect is ensured, the ammonia water vapor is prevented from entering the liquid storage tank, the back pressure of the system is reduced, and the efficiency of the system is improved. And the functions can be realized only by simply transforming the original Kalina cycle power generation system, and the system is simple in structure and easy to implement.

Description

Technical Field

[0001] The present application relates to the technical field of waste heat power generation, and in particular to a liquid injection condensation system of an ammonia water circulation power generation system. Background Art

[0002] In production and life, there is a lot of unused heat energy discharged into the environment, such as flue gas, water vapor, hot water, etc. The energy contained in it can be recovered and converted into electricity through the waste heat power generation system. The technologies used in the waste heat power generation system include organic Rankine cycle, Kalina cycle, Brayton cycle, etc. Among them, the Kalina cycle uses ammonia water mixture as the medium to achieve waste heat recovery.

[0003] In the Kalina cycle power generation system, the liquid ammonia medium is stored in a liquid storage tank, and the liquid ammonia is sent to each heat exchanger through a working fluid pump to absorb heat and evaporate. Each heat exchanger includes a regenerator, an evaporator, etc. After absorbing the heat energy of the heat source by each heat exchanger, ammonia vapor with a certain dryness is formed. The ammonia vapor is separated in the separator into gaseous saturated ammonia vapor and liquid lean ammonia solution. The gaseous saturated ammonia vapor enters the turbine power generation device to complete power generation and forms low-temperature and low-pressure exhaust steam. The exhaust steam and the lean ammonia solution still have a certain amount of heat. After mixing in the mixer, the heat energy is recovered back to the system through the regenerator. Finally, the ammonia vapor enters the condenser, and the ammonia vapor is re-condensed into liquid by cooling water and returned to the liquid storage tank to complete the entire cycle.

[0004] In the above Kalina cycle power generation system, ammonia vapor is separated and remixed. Theoretically, when the system is running smoothly, the concentration of the remixed ammonia vapor remains unchanged and can be effectively condensed into liquid by cooling water. However, in actual operation, the concentration of ammonia vapor is often affected by many factors such as heat source temperature, load changes, and separation effect, resulting in changes in the concentration of ammonia vapor entering the condenser. When the concentration of ammonia vapor entering the condenser is too high, high-concentration ammonia requires a lower temperature to condense into liquid. At this time, the cooling water is not enough to condense the ammonia vapor into liquid, and high-concentration ammonia vapor enters the ammonia storage tank and accumulates, resulting in a significant increase in the back pressure of the entire system and reducing the system efficiency. Summary of the invention

[0005] The present invention is intended to provide a liquid spray condensation system suitable for an ammonia water circulation power generation system, so as to solve the problem of increased system back pressure caused by changes in ammonia water concentration due to unstable factors in the system.

[0006] The embodiment of the present invention provides a liquid spray condensation system of an ammonia water circulation power generation system, comprising: a liquid storage tank, a working fluid pump, a spray section, a condenser and a control valve;

[0007] The liquid storage tank is used to store ammonia-based liquid;

[0008] The working fluid pump is used to extract the ammonia-based liquid from the liquid storage tank and transport it under pressure through the ammonia-based liquid pipeline;

[0009] The condenser is used to condense ammonia vapor;

[0010] The liquid storage tank, the working fluid pump and the condenser are connected via pipelines;

[0011] A spray main pipeline is arranged on the ammonia-based liquid pipeline, which is used to connect the spray section and provide the ammonia-based liquid to the spray section;

[0012] The control valve is installed on the main liquid injection line, and the control valve is used to adjust the flow rate of the ammonia base liquid;

[0013] The spray section is installed on the ammonia water vapor inlet pipeline of the condenser, and comprises a main steam pipeline, a plurality of nozzles and a liquid infusion pipeline connected to the nozzles, and is used for atomizing the ammonia water base liquid and spraying it into the ammonia water vapor.

[0014] In some embodiments, the infusion pipeline includes a spray capillary corresponding to each of the nozzles, and the nozzle is connected to the spray main pipeline through the spray capillary, and the spray main pipeline is divided into each of the spray capillaries, and the ammonia spray is atomized and sprayed into the ammonia vapor through the nozzle.

[0015] In some embodiments, the main liquid spray line is provided with stop valves at the head end and the tail end.

[0016] In some embodiments, the specifications of the main steam pipeline of the spray section are consistent with the ammonia vapor inlet pipeline of the condenser.

[0017] In some embodiments, the spray section is installed on the ammonia vapor inlet pipeline of the condenser, and includes:

[0018] The spray section is installed on the downcomer or the horizontal pipe.

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

[0020] In some embodiments, a pressure transmitter and a flow meter are provided on the main liquid injection line, and the pressure transmitter and the flow meter are used to monitor the pressure and flow parameters of the ammonia base liquid.

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

[0022] In some embodiments, the control valve is used to adjust the flow rate of the ammonia-based liquid, including: the control valve is used to manually or automatically control the flow rate of the ammonia-based liquid.

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

[0024] The liquid spray condensation system of the ammonia water cycle power generation system of the above embodiment of the present invention sprays low-concentration liquid ammonia water into high-concentration ammonia water vapor, thereby reducing the ammonia concentration, ensuring the condensation effect, preventing ammonia water vapor from entering the liquid storage tank, reducing the system back pressure and improving the system efficiency. In addition, the present invention only requires a simple modification of the original Kalina cycle power generation system to achieve the function, and the structure is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings illustrate generally, by way of example and not limitation, various embodiments discussed herein.

[0026] Figure 1 This is a schematic diagram of the structure of the liquid spray condensation system of the ammonia water circulation power generation system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0028] In the embodiments of the present application, it should be noted that, unless otherwise specified and limited, the term "connection" should be understood in a broad sense. For example, it can be an electrical connection or a connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

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

[0030] A liquid spray condensation system of an ammonia water circulation power generation system according to an embodiment of the present invention is applied to a Kalina circulation system using ammonia water as a medium. It is a system that condenses ammonia water vapor into liquid by spraying liquid ammonia water at room temperature into ammonia water vapor.

[0031] The embodiment of the present invention provides a liquid spray condensation system for an ammonia water circulation power generation system, such as Figure 1 As shown, the system includes: a liquid storage tank 1, a working fluid pump 2, a spray section 4, a condenser 3, and a control valve 5.

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

[0033] The working fluid pump 2 is used to extract the ammonia-based liquid from the liquid storage tank 1 and transport it under pressure through the ammonia-based liquid pipeline 12 .

[0034] Condenser 3 is used to condense ammonia vapor.

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

[0036] A spray main pipeline 11 is arranged on the ammonia water-based liquid pipeline 12 , which is used to connect the spray section 4 and provide the ammonia water-based liquid to the spray section 4 .

[0037] The control valve 5 is installed on the main spray pipe 11, and the control valve 5 is used to adjust the flow rate of the ammonia base liquid.

[0038] The spray section 4 is installed on the ammonia vapor inlet pipeline 16 of the condenser 3, and includes a main steam pipeline 13, a nozzle 14 and a liquid injection capillary 15 connected to the nozzle 14, and is used to atomize the ammonia base liquid and spray it into the ammonia vapor.

[0039] In some embodiments, a liquid spray capillary 15 corresponds to each nozzle 14 , and the nozzle 14 is connected to the spray main line 11 through the liquid spray capillary 15 , and the spray main line 11 is divided into each liquid spray capillary 15 , and the ammonia liquid is atomized and sprayed into the ammonia vapor through the nozzle 14 .

[0040] In some embodiments, the main spray line 11 is provided with stop valves 6 at the head end and the tail end.

[0041] In some embodiments, the specifications of the main steam pipeline 13 of the spray section 4 are consistent with the ammonia vapor inlet pipeline 16 of the condenser 3 .

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

[0043] In some embodiments, a pressure transmitter 7 and a flow meter 8 are provided on the main spray line 11, and the pressure transmitter 7 and the flow meter 8 are used to monitor the pressure and flow parameters of the ammonia-based liquid.

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

[0045] In some embodiments, the control valve 5 is used to adjust the flow rate of the ammonia-based liquid, including: the control valve 5 is used to manually or automatically control the flow rate of the ammonia-based liquid.

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

[0047] The liquid spray condensation system of the ammonia water cycle power generation system sprays low-concentration liquid ammonia water into high-concentration ammonia water vapor, thereby reducing the ammonia concentration, ensuring the condensation effect, preventing ammonia water vapor from entering the liquid storage tank, reducing the system back pressure and improving the system efficiency. In addition, the present invention only requires a simple modification of the original Kalina cycle power generation system to achieve the function, and the structure is simple and easy to implement.

[0048] The present invention is intended to provide a liquid spray condensation system suitable for an ammonia water circulation power generation system, so as to solve the problem of increased system back pressure caused by changes in ammonia water concentration due to unstable factors in the system.

[0049] In order to achieve the above object, the basic scheme of the present invention is as follows:

[0050] The spray condensation system includes the liquid storage tank, working fluid pump, condenser and pipelines in the original Kalina cycle power generation system. It also includes a control valve, a spray section and its pipelines. The spray section includes a main steam pipeline, a nozzle and a liquid infusion pipeline connected to the nozzle.

[0051] The working fluid pump extracts ammonia working fluid from the liquid storage tank and conveys it to the regenerator in the Kalina cycle power generation system through a pipeline under pressure. Ammonia working fluid is diverted in this pipeline and the ammonia spray required by the present invention is provided through the main spray pipeline.

[0052] The control valve is located on the main spray line, and the ammonia spray flow rate is adjusted by the control valve. The ammonia spray is then transported to the spray section through the pipeline.

[0053] The spray section is installed on the ammonia vapor inlet pipeline of the condenser. The spray section mainly includes a main pipeline connected to the ammonia vapor inlet pipeline and a plurality of nozzles in the main pipeline. The nozzles are connected to the main spray pipeline through spray capillaries. The main spray pipeline is divided into each spray capillary, and the ammonia spray is atomized and sprayed into the ammonia vapor through the nozzles, thereby reducing the ammonia concentration.

[0054] The specifications of the main pipeline of the spray section are consistent with the ammonia vapor inlet pipeline of the condenser to facilitate installation.

[0055] The spray section should be installed in the downcomer or horizontal pipe, not in the riser.

[0056] The number and specifications of nozzles in the spray section need to be selected and arranged according to the spray flow rate, and evenly arranged in the main pipeline of the spray section to achieve the best atomization and absorption effect, which can effectively reduce the concentration of ammonia vapor.

[0057] The direction of the nozzles in the spray section is consistent with the direction of the air flow.

[0058] Pressure transmitters and flow meters can be arranged on the main spray line to monitor and adjust the spray flow rate to achieve the best spray condensation effect. Pressure transmitters and flow meters should be arranged after the control valve.

[0059] like Figure 1 As shown, the liquid spray condensation system of the present invention is composed of a liquid storage tank, a working fluid pump, a spray section, a condenser, a control valve, a stop valve, a pressure transmitter, a flow meter and a pipeline.

[0060] The working fluid pump draws from the storage tank and provides ammonia-based fluid to the system.

[0061] A branch is branched off from the ammonia base liquid pipeline, which is the main spray pipeline and provides the required liquid low-concentration ammonia water for the spray section.

[0062] Stop valves are provided at the head and end of the main liquid spray line to facilitate installation and disassembly.

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

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

[0065] The spray section includes a plurality of uniformly arranged nozzles, and a plurality of capillaries are branched from the main spray line to supply liquid low-concentration ammonia water to the nozzles.

[0066] After high-concentration ammonia vapor and low-concentration liquid ammonia are mixed through a section of pipeline, they enter the condenser together, are condensed into liquid by cooling water, and flow back to the liquid storage tank, thus achieving the liquid spray condensation function of the present invention.

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

[0068] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A liquid spray condensation system for an ammonia water circulation power generation system, characterized in that: include: Liquid storage tank, working fluid pump, spray section, condenser and control valve; The liquid storage tank is used to store ammonia-based liquid; The working fluid pump is used to extract the ammonia-based liquid from the liquid storage tank and transport it under pressure through the ammonia-based liquid pipeline; The condenser is used to condense ammonia vapor; The liquid storage tank, the working fluid pump and the condenser are connected via pipelines; A spray main pipeline is arranged on the ammonia-based liquid pipeline, which is used to connect the spray section and provide the ammonia-based liquid to the spray section; The control valve is installed on the main liquid injection line, and the control valve is used to adjust the flow rate of the ammonia base liquid; The spray section is installed on the ammonia water vapor inlet pipeline of the condenser, and comprises a main steam pipeline, a plurality of nozzles and a liquid infusion pipeline connected to the nozzles, and is used for atomizing the ammonia water base liquid and spraying it into the ammonia water vapor.

2. The liquid spray condensation system of the ammonia water circulation power generation system according to claim 1, characterized in that: The liquid infusion pipeline includes a liquid spray capillary corresponding to each of the nozzles, and the nozzle is connected to the liquid spray main pipeline through the liquid spray capillary. The liquid spray main pipeline is divided into each of the liquid spray capillaries, and the ammonia liquid is atomized and sprayed into the ammonia vapor through the nozzle.

3. The liquid spray condensation system of the ammonia water circulation power generation system according to claim 1, characterized in that: The main liquid spraying line is provided with stop valves at the head end and the tail end.

4. The liquid spray condensation system of the ammonia water circulation power generation system according to claim 1, characterized in that: The specification of the main steam pipeline of the spray section is consistent with the ammonia steam inlet pipeline of the condenser.

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

6. The liquid spray condensation system of the ammonia water circulation power generation system according to claim 1, characterized in that: The spraying direction of the nozzle in the spray section is consistent with the air flow direction.

7. The liquid spray condensation system of the ammonia water cycle power generation system according to any one of claims 1 to 6, characterized in that: A pressure transmitter and a flow meter are arranged on the main liquid injection line, and the pressure transmitter and the flow meter are used to monitor the pressure and flow parameters of the ammonia base liquid.

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

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

10. The liquid spray condensation system of the ammonia water circulation power generation system according to claim 1, characterized in that: Ammonia water vapor and liquid ammonia water sprayed from the nozzle are mixed through the pipeline, enter the condenser together, are condensed into liquid by cooling water, and flow back to the liquid storage tank.

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