CN210261140U - Ammonia water preparation system capable of simultaneously preparing ammonia water with two concentrations - Google Patents
Ammonia water preparation system capable of simultaneously preparing ammonia water with two concentrations Download PDFInfo
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- CN210261140U CN210261140U CN201920891245.6U CN201920891245U CN210261140U CN 210261140 U CN210261140 U CN 210261140U CN 201920891245 U CN201920891245 U CN 201920891245U CN 210261140 U CN210261140 U CN 210261140U
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Abstract
The utility model discloses an aqueous ammonia preparation system of two kinds of concentration aqueous ammonia can prepare simultaneously belongs to the chemical production field, the utility model discloses the technical problem that solves ensures that concentration configuration is even, aqueous ammonia flow is stable, the process line is simple, save labour and construction cost is low for how to realize preparing two kinds of aqueous ammonia simultaneously, and technical scheme is: the system comprises an ammonia absorber, a mixer, a 20% ammonia water storage tank, an 8% ammonia water storage tank, a liquid ammonia inlet pipeline and a desalted water inlet main pipeline, wherein the liquid ammonia inlet pipeline is arranged at one side of the lower part of the ammonia absorber and is communicated with the ammonia absorber; a 20% ammonia water outlet main pipeline is arranged at the other side of the lower part of the ammonia absorber, and the ammonia absorber is communicated with the 20% ammonia water outlet main pipeline; the 20% ammonia water outlet main pipeline is divided into two branches, wherein one branch is a 20% ammonia water storage tank branch pipeline; the other branch is divided into two branches for the mixer inlet 20% ammonia branch pipeline desalted water inlet main pipeline: one branch is a desalted water inlet branch pipeline; the other branch is a desalted water branch pipeline at the inlet of the mixer.
Description
Technical Field
The utility model belongs to the technical field of chemical production, specifically speaking is an aqueous ammonia preparation system that can prepare two kinds of concentration aqueous ammonia simultaneously.
Background
Traditional aqueous ammonia preparation facilities is the aqueous ammonia of only preparing single concentration, and liquid ammonia is through gasification, dissolve, heat transfer process after, the output is stored in the aqueous ammonia jar, carries desulfurization, denitrification facility respectively through the ammonia pump. The 20% ammonia water sent to the desulphurization device is mixed with 8% ammonia water in the desulphurization ammonia water tank dilution system to be used by the desulphurization device.
The traditional process technology has the problems of uneven concentration configuration, unstable ammonia water flow, additional power consumption, laggard operation mode and the like.
In addition, two sets of ammonia water preparation devices are also arranged, each set of ammonia water is used for preparing 20% and 8% ammonia water respectively, and the ammonia water is produced, stored and conveyed to the desulfurization and denitrification device for use. The design method has the advantages of large floor area, complex process route and large construction investment.
Disclosure of Invention
The technical task of the utility model is to provide an aqueous ammonia preparation system that can prepare two kinds of concentration aqueous ammonia simultaneously, solve how to realize preparing two kinds of aqueous ammonia simultaneously, ensure that concentration configuration is even, aqueous ammonia flow is stable, the process line is simple, save labour and the problem of construction cost low.
The technical task of the utility model is realized in the following way, an aqueous ammonia preparation system capable of simultaneously preparing aqueous ammonia with two concentrations comprises an ammonia absorber, a mixer, a 20% aqueous ammonia storage tank, a 8% aqueous ammonia storage tank, a liquid ammonia inlet pipeline and a desalted water inlet main pipeline, wherein the liquid ammonia inlet pipeline is arranged at one side of the lower part of the ammonia absorber and is communicated with the ammonia absorber; a 20% ammonia water outlet main pipeline is arranged at the other side of the lower part of the ammonia absorber, and the ammonia absorber is communicated with the 20% ammonia water outlet main pipeline;
the 20% ammonia water outlet main pipeline is divided into two branches, wherein one branch is a 20% ammonia water storage tank branch pipeline, and the 20% ammonia water storage tank branch pipeline is communicated with a 20% ammonia water storage tank; the other path is a branch pipeline of 20% ammonia water at the inlet of the mixer, and the branch pipeline of 20% ammonia water at the inlet of the mixer is communicated with the mixer;
the main pipeline of the desalted water inlet is arranged at one side of the upper part of the ammonia absorber, and the main pipeline of the desalted water inlet is divided into two branches: one branch pipeline is a desalted water inlet branch pipeline which is communicated with an ammonia absorber; the other branch pipeline is a desalted water branch pipeline at the inlet of the mixer, and the desalted water branch pipeline at the inlet of the mixer is communicated with the mixer; the mixer is communicated with the 8% ammonia water storage tank through a pipeline of the 8% ammonia water storage tank.
Preferably, an ammonia suction device liquid ammonia pressure regulating valve and a liquid ammonia flow meter are arranged on the liquid ammonia inlet pipeline, and the ammonia suction device liquid ammonia pressure regulating valve and the liquid ammonia flow meter are used for controlling the pressure and the flow of liquid ammonia entering the ammonia suction device.
Preferably, the desalted water inlet branch pipeline is provided with an ammonia intake device desalted water flow regulating valve and a desalted water intake device flow meter, and the ammonia intake device desalted water flow regulating valve and the desalted water intake device flow meter are used for controlling the pressure and the flow of the desalted water entering the ammonia intake device.
Preferably, the mixer inlet desalted water flow regulating valve and the desalted water inlet mixer flowmeter are arranged on the mixer inlet desalted water branch pipeline, and are used for controlling the pressure and flow of the desalted water entering the mixer.
More preferably, the 20% ammonia water storage tank branch pipeline is provided with a 20% ammonia water flow control valve and a 20% ammonia water inlet 20% ammonia water storage tank flowmeter, and the 20% ammonia water flow control valve and the 20% ammonia water inlet 20% ammonia water storage tank flowmeter are used for controlling the pressure and flow of 20% ammonia water entering the 20% ammonia water storage tank.
Preferably, a mixer inlet 20% ammonia water flow regulating valve and a mixer inlet 20% ammonia water inlet flowmeter are arranged on the mixer inlet 20% ammonia water branch pipeline, and the mixer inlet 20% ammonia water flow regulating valve and the mixer inlet 20% ammonia water inlet flowmeter are used for controlling the pressure and flow of 20% ammonia water entering the mixer.
Preferably, one side of the ammonia absorber is provided with a circulating water inlet pipeline and a circulating water return pipeline, and the circulating water inlet pipeline, the ammonia absorber and the circulating water return pipeline are sequentially communicated.
Preferably, the ammonia absorber is cylindrical, and the desalted water inlet branch pipeline is communicated with a Venturi ejector at the upper part of the ammonia absorber; the circulating water return pipeline is communicated with a Venturi ejector at the upper part of the ammonia absorber;
the high-temperature ammonia water and circulating water heat exchanger in the middle of the ammonia absorber adopts a tubular structure, the tube pass of the tubular high-temperature ammonia water and circulating water heat exchanger is the high-temperature ammonia water, and the high-temperature ammonia water flows from top to bottom; the shell pass of the tubular high-temperature ammonia water and circulating water heat exchanger is circulating water which flows from bottom to top; the circulating water inlet pipeline is communicated with the high-temperature ammonia water in the middle of the ammonia absorber and a circulating water inlet of the circulating water heat exchanger;
the high-temperature ammonia water and liquid ammonia heat exchanger at the lower part of the ammonia absorber adopts a tubular structure, the inlets of the high-temperature ammonia water and liquid ammonia heat exchanger at the lower part of the ammonia absorber with the tubular structure are communicated with a liquid ammonia inlet pipeline, and the outlets of the high-temperature ammonia water and liquid ammonia heat exchanger at the lower part of the ammonia absorber with the tubular structure are respectively communicated with a 20% ammonia water storage tank and a mixer; the tube pass of the high-temperature ammonia water and liquid ammonia heat exchanger is high-temperature ammonia water which flows from top to bottom; the shell side of the high-temperature ammonia water and liquid ammonia heat exchanger is liquid ammonia and flows from bottom to top.
Preferably, the lower end of the 20% ammonia water storage tank is provided with a 20% ammonia water output pipeline, the 20% ammonia water output pipeline is provided with a 20% ammonia water pump, and the 20% ammonia water pump is used for pumping the 20% ammonia water from the 20% ammonia water storage tank to the process of removing the pin by using the 20% ammonia water through the 20% ammonia water output pipeline.
More preferably, 8% aqueous ammonia storage tank lower extreme is provided with 8% aqueous ammonia output pipeline, is provided with 8% ammonia pump on the 8% aqueous ammonia output pipeline, and 8% ammonia pump is used for taking out 8% aqueous ammonia from 8% aqueous ammonia storage tank to utilizing 8% aqueous ammonia to remove the desulfurization process through 8% aqueous ammonia output pipeline.
The utility model discloses an aqueous ammonia preparation system that can prepare two kinds of concentration aqueous ammonia simultaneously has following advantage:
the utility model discloses utilize one set of aqueous ammonia preparation facilities, prepare two kinds of concentration aqueous ammonia simultaneously to realize automatic operation, DCS control and a key start-stop, two kinds of aqueous ammonia export concentration, output can set up the regulation along with the user's demand, and the aqueous ammonia preparation technology is advanced, moves safe and stable;
(II), the utility model discloses a one set of aqueous ammonia preparation facilities, 20% of simultaneous output, two kinds of concentration aqueous ammonia of 8%, send to 20% aqueous ammonia storage tank respectively, 8% aqueous ammonia storage tank, carry respectively to the desulfurization through respective ammonia pump, the denitration device directly throws the material and uses, utilize single set of aqueous ammonia preparation facilities, prepare two kinds of concentration aqueous ammonia simultaneously, can replace the technology that two sets of aqueous ammonia prepared two kinds of concentration aqueous ammonia, the desulfurization device can leave out the aqueous ammonia dilution module, the area is saved, the construction investment is reduced, ensure that the concentration configuration is even, the aqueous ammonia flow is stable, the process route is simple, save labour and the construction cost is low;
the utility model has the advantages that the control instrument is perfect, the material monitoring and adjusting instrument is complete, the PLC controls the material monitoring and adjusting instrument and is connected with the DCS for remote operation, the labor intensity of workers is greatly reduced, the operation efficiency is improved, one-key starting and stopping are realized, and the vehicle is safely stopped and started;
the utility model precisely controls the inlet and outlet materials, and the desalted water, the liquid ammonia and the ammonia water can adjust parameters such as pressure, temperature and concentration according to the actual production requirements, thereby ensuring that the outlet products are qualified;
the utility model precisely adjusts the flow of the outlet ammonia water, can meet the requirements of normal production and special conditions, and can continuously or discontinuously operate;
(VI), the utility model discloses realize variable operating mode operation, also can singly export 20% or 8% concentration aqueous ammonia.
The utility model has the characteristics of reasonable in design, simple structure, easily processing, small, convenient to use, a thing is multi-purpose etc, therefore, has fine popularization and use value.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of an aqueous ammonia production system capable of producing aqueous ammonia of two concentrations simultaneously.
In the figure: in the figure: 1. a desalted water inlet branch pipeline, 2, a desalted water inlet flow regulating valve of an ammonia absorber, 3, an ammonia absorber, 4, a liquid ammonia inlet pipeline, 5, a liquid ammonia pressure regulating valve of the ammonia absorber, a total pipeline of 6 and 20% ammonia water outlets, 7 and 20% ammonia water flow regulating valves, a branch pipeline of 8 and 20% ammonia water storage tanks, 9 and 20% ammonia water storage tanks, 10 and 20% ammonia water pumps, 11, a mixer inlet desalted water branch pipeline, 12, a mixer inlet desalted water flow regulating valve, 13, a mixer inlet 20% ammonia water flow regulating valve, 14, a mixer, 15 and 8% ammonia water storage tanks, 16 and 8% ammonia water storage tanks, 17 and 8% ammonia water pumps, 18, a circulating water inlet pipeline, 19, a circulating water return pipeline, 20 and a desalted water inlet total pipeline, 21 and 20% ammonia water output pipeline, 22, a mixer inlet 20% ammonia water branch pipeline, 23 and a liquid ammonia flow meter, 24. desalted water enters an ammonia absorber flowmeter, 25 desalted water enters a mixer flowmeter, 26 and 20 percent ammonia water enters a 20 percent ammonia water storage tank flowmeter, 27 and 20 percent ammonia water enters the mixer flowmeter, 28 and a gas ammonia pipeline, 29 and a Venturi ejector, 30 and a high-temperature ammonia water and circulating water heat exchanger, 31 and a high-temperature ammonia water and liquid ammonia heat exchanger, and 32 and 8 percent ammonia water output pipeline.
Detailed Description
An ammonia water production system capable of producing ammonia water of two concentrations simultaneously according to the present invention will be described in detail below with reference to the drawings and specific examples.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and for simplification of description. And are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "in communication" are to be construed broadly, e.g., as meaning either fixed or removable communication, or integral communication; either mechanically or electrically; either directly or indirectly through intervening media, or both elements may be interconnected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in the attached drawing 1, the ammonia water preparation system capable of simultaneously preparing ammonia water with two concentrations of the utility model structurally comprises an ammonia absorber 3, a mixer 14, a 20% ammonia water storage tank 9, a 8% ammonia water storage tank 16, a liquid ammonia inlet pipeline 4 and a desalted water inlet main pipeline 20, wherein the liquid ammonia inlet pipeline 4 is arranged at one side of the lower part of the ammonia absorber 3, and the liquid ammonia inlet pipeline 4 is communicated with the ammonia absorber 3; and the liquid ammonia inlet pipeline 4 is provided with an ammonia suction device liquid ammonia pressure regulating valve 5 and a liquid ammonia flow meter 23, and the ammonia suction device liquid ammonia pressure regulating valve 5 and the liquid ammonia flow meter 23 are used for controlling the pressure and the flow of the liquid ammonia entering the ammonia suction device 3. And a 20% ammonia water outlet main pipeline 6 is arranged at the other side of the lower part of the ammonia absorber 3, the ammonia absorber 3 is communicated with the 20% ammonia water outlet main pipeline 6, a densimeter is arranged on the 20% ammonia water outlet main pipeline 6, and the whole device is connected to a PLC (programmable logic controller) control system and is connected to a DCS (distributed control system) to operate and control. The 20% ammonia water outlet main pipeline 6 is divided into two branches, wherein one branch is a 20% ammonia water storage tank branch pipeline 8, a 20% ammonia water flow regulating valve 7 and a 20% ammonia water inlet 20% ammonia water storage tank flowmeter 26 are installed on the 20% ammonia water storage tank branch pipeline 8, and the 20% ammonia water flow regulating valve 7 and the 20% ammonia water inlet 20% ammonia water storage tank flowmeter 26 are used for controlling the pressure and the flow of 20% ammonia water entering a 20% ammonia water storage tank 9; the 20% ammonia water storage tank branch pipeline 8 is communicated with the 20% ammonia water storage tank 9, the 20% ammonia water output pipeline 21 is installed at the lower end of the 20% ammonia water storage tank 9, the 20% ammonia water pump 10 is installed on the 20% ammonia water output pipeline 21, and the 20% ammonia water pump 10 is used for conveying 20% ammonia water from the 20% ammonia water storage tank 9 to a denitration process by utilizing the 20% ammonia water through the 20% ammonia water output pipeline 21; the other path is a 20% ammonia water branch pipeline 22 at the inlet of the mixer, and the 20% ammonia water branch pipeline 22 at the inlet of the mixer is communicated with the mixer 14; the mixer inlet 20% ammonia water branch pipe 22 is provided with a mixer inlet 20% ammonia water flow regulating valve 13 and a mixer inlet flowmeter 27, and the mixer inlet 20% ammonia water flow regulating valve 13 and the mixer inlet 20% ammonia water flow regulating valve 27 are used for controlling the pressure and the flow of 20% ammonia water entering the mixer. The desalted water inlet main pipeline 20 is arranged at one side of the upper part of the ammonia absorber 3, and the desalted water inlet main pipeline 20 is divided into two branches: one branch pipeline is a desalted water inlet branch pipeline 1, the desalted water inlet branch pipeline 1 is communicated with an ammonia absorber 3, an ammonia inlet absorber desalted water flow regulating valve 2 and a desalted water inlet absorber flow meter 24 are mounted on the desalted water inlet branch pipeline 1, and the ammonia inlet absorber desalted water flow regulating valve 2 and the desalted water inlet absorber flow meter 24 are used for controlling the pressure and flow of desalted water entering the ammonia absorber 3; the other branch pipeline is a mixer inlet desalted water branch pipeline 11, a mixer inlet desalted water flow regulating valve 12 and a desalted water inlet mixer flowmeter 25 are arranged on the mixer inlet desalted water branch pipeline 11, and the mixer inlet desalted water flow regulating valve 12 and the desalted water inlet mixer flowmeter 25 are used for controlling the pressure and the flow of desalted water entering the mixer 14; the mixer inlet desalted water branch pipeline 11 is communicated with a mixer 14; the mixer 14 is communicated with the 8% ammonia water storage tank 16 through an 8% ammonia water storage tank pipeline 15, an 8% ammonia water output pipeline 28 is installed at the lower end of the 8% ammonia water storage tank 16, an 8% ammonia water pump 17 is installed on the 8% ammonia water output pipeline 28, and the 8% ammonia water pump 17 is used for conveying 8% ammonia water from the 8% ammonia water storage tank 16 to the desulfurization process by using the 8% ammonia water through the 8% ammonia water output pipeline 28. And a circulating water inlet pipeline 18 and a circulating water return pipeline 19 are arranged on one side of the ammonia absorber 3, and the circulating water inlet pipeline 18, the ammonia absorber 3 and the circulating water return pipeline 19 are sequentially communicated. The ammonia absorber 3 is cylindrical, and the desalted water inlet branch pipeline 1 is communicated with a Venturi ejector 29 at the upper part of the ammonia absorber 3; the circulating water return pipeline 19 is communicated with a Venturi ejector 29 at the upper part of the ammonia absorber 3; the high-temperature ammonia water and circulating water heat exchanger 30 in the middle of the ammonia absorber 3 adopts a tubular structure, the tube side of the tubular high-temperature ammonia water and circulating water heat exchanger 30 is the high-temperature ammonia water, and the high-temperature ammonia water flows from top to bottom; the shell pass of the tubular high-temperature ammonia water and circulating water heat exchanger 30 is circulating water, and the circulating water flows from bottom to top; the circulating water inlet pipeline 18 is communicated with the high-temperature ammonia water in the middle of the ammonia absorber 3 and a circulating water inlet of the circulating water heat exchanger 30; the high-temperature ammonia water and liquid ammonia heat exchanger 31 at the lower part of the ammonia absorber 3 adopts a tubular structure, the inlet of the high-temperature ammonia water and liquid ammonia heat exchanger 31 at the lower part of the ammonia absorber 3 with the tubular structure is communicated with the liquid ammonia inlet pipeline 4, and the outlet of the high-temperature ammonia water and liquid ammonia heat exchanger 31 at the lower part of the ammonia absorber 3 with the tubular structure is respectively communicated with the 20% ammonia water storage tank 9 and the mixer 14; the tube pass of the high-temperature ammonia water and liquid ammonia heat exchanger 31 is high-temperature ammonia water which flows from top to bottom; the shell side of the high-temperature ammonia water and liquid ammonia heat exchanger 31 is liquid ammonia and flows from bottom to top.
Liquid ammonia from the pipe network enters the high-temperature ammonia water and liquid ammonia heat exchanger 31 at the lower part of the ammonia absorber 3 after flow regulation and pressure regulation of the ammonia absorber liquid ammonia pressure regulating valve 5 and the liquid ammonia flowmeter 23 on the liquid ammonia inlet pipeline 4, exchanges heat with the high-temperature ammonia water, is gasified into gas ammonia after heat absorption, enters the upper Venturi ejector 29, is dissolved in desalted water from the pipe network, and is absorbed.
Circulating water from a pipe network enters the high-temperature ammonia water and circulating water heat exchanger 30 in the middle of the ammonia absorber 3 from bottom to top, exchanges heat with the high-temperature ammonia water, removes a part of heat, flows out of the high-temperature ammonia water and circulating water heat exchanger 30 in the middle of the ammonia absorber 3 and returns to a circulating water return pipe network.
The liquid ammonia import pipeline 4 that comes from the pipe network communicates with advancing ammonia absorber liquid ammonia pressure regulating valve 5 and liquid ammonia flowmeter 23 for liquid ammonia cuts off, flow control, decompression, advances ammonia absorber liquid ammonia pressure regulating valve 5 and links to 3 lower parts high temperature aqueous ammonia of ammonia absorber and 31 import mouths of tubes of liquid ammonia heat exchanger, liquid ammonia and intraductal high temperature aqueous ammonia heat transfer back, gasify into gas ammonia, from 3 lower parts high temperature aqueous ammonia of ammonia absorber and 31 mouths of tubes of liquid ammonia heat exchanger export, get into the 29 side mouths of tubes of venturi ejectors on the upper portion of ammonia absorber 3.
The desalted water inlet branch pipeline 1 from the pipe network is communicated with the desalted water flow regulating valve 2 of the ammonia intake device, and the desalted water flow regulating valve 2 of the ammonia intake device is connected to a main inlet pipe orifice of a Venturi ejector 29 at the upper part of the ammonia intake device 3.
After the gas ammonia and the desalted water are dissolved and absorbed into 20% ammonia water at the outlet of the Venturi ejector 29, the gas ammonia and the desalted water flow out from the outlet at the lower part of the heat exchanger of the ammonia absorber 3 from top to bottom in the ammonia absorber 3 after heat exchange is carried out between the high-temperature ammonia water and circulating water heat exchanger 30 at the middle part and the circulating water and between the high-temperature ammonia water and liquid ammonia heat exchanger 31 at the lower part and the liquid ammonia heat exchanger 31.
The desalted water from the pipe network is divided into two paths: one path of the ammonia is sent to the ammonia absorber 3 after being adjusted by the flow adjusting valve 2 of the desalted water inlet ammonia absorber desalted water on the desalted water inlet branch pipeline 1 and the flow adjusting valve 24 of the desalted water inlet ammonia absorber, is dissolved and absorbed by the gasified gas ammonia at the lower part of the ammonia absorber 3, exchanges heat with the circulating water through the high-temperature ammonia water and circulating water heat exchanger 30 at the middle part of the ammonia absorber 3, removes a part of heat, enters the lower high-temperature ammonia water and liquid ammonia heat exchanger 31 to exchange heat with the liquid ammonia, heats and gasifies the liquid ammonia into gas ammonia, and then is sent out of the ammonia absorber 3; the other path of the desalted water flows to the inlet of the mixer 14 after passing through a mixer inlet desalted water flow regulating valve 12 on a mixer inlet desalted water branch pipeline 11 and the flow regulation of the desalted water entering a mixer flowmeter 25.
The 20% ammonia water from the ammonia absorber 3 is divided into two paths: one path of ammonia water enters a 20% ammonia water storage tank flowmeter 26 through a 20% ammonia water flow regulating valve 7 on a 20% ammonia water storage tank branch pipeline 8 and 20% ammonia water, then goes to a 20% ammonia water storage tank 9, and is pressurized and conveyed to a boiler denitration device through a 20% ammonia water pump 10; the other path of the ammonia water enters a mixer 14 after the flow regulation of a mixer inlet 20% ammonia water flow regulating valve 13 on a mixer inlet 20% ammonia water branch pipeline 22 and 20% ammonia water in a mixer flowmeter 27, is mixed with desalted water from a pipe network in a proportioning manner to prepare 8% ammonia water, then the ammonia water goes to an 8% ammonia water storage tank 16, and is pressurized and conveyed to a boiler desulfurization device through an 8% ammonia water pump 17.
The utility model discloses an operating mode includes following three kinds:
(I) a system working mode of simultaneously producing 20% and 8% ammonia water:
①, supplying water by a desalted water pipe network, opening and adjusting a desalted water flow regulating valve 2 and a desalted water flow meter 24 of an ammonia absorber, opening and adjusting a liquid ammonia pressure regulating valve 5 and a liquid ammonia flow meter 23 of the ammonia absorber, and adjusting the amount of the circulating water according to the outlet temperature of 20% ammonia water;
②, opening and adjusting the 20% ammonia water flow control valve 7 and the 20% ammonia water flow meter 26 of the 20% ammonia water storage tank, conveying the 20% ammonia water to the 20% ammonia water storage tank 9, starting the 20% ammonia water pump 10 according to the liquid level condition of the 20% ammonia water storage tank 9, and conveying the 20% ammonia water to the boiler denitration device;
③, opening and adjusting a desalted water flow regulating valve 12 and a desalted water inlet mixer flowmeter 25 at the inlet of the mixer, opening and adjusting a 20% ammonia water flow regulating valve 13 and a 20% ammonia water inlet mixer flowmeter 27 at the inlet of the mixer, conveying 8% ammonia water to an 8% ammonia water storage tank 16, starting an 8% ammonia water pump 17 according to the liquid level condition of the 8% ammonia water storage tank 16, and conveying 8% ammonia water to a boiler desulfurization device;
④, adjusting the opening of each flow adjusting valve according to the ammonia water consumption requirement of the boiler desulfurization and denitration device, and flexibly adjusting the ammonia water yield.
(II) the working mode of the system only producing 20% ammonia water:
①, closing the desalted water flow regulating valve 12 at the inlet of the mixer, and closing the 20% ammonia water flow regulating valve 13 at the inlet of the mixer;
②, supplying water by a desalted water pipe network, opening and adjusting a desalted water flow regulating valve 2 and a desalted water flow meter 24 of an ammonia absorber, opening and adjusting a liquid ammonia pressure regulating valve 5 and a liquid ammonia flow meter 23 of the ammonia absorber, and adjusting the amount of the circulating water according to the outlet temperature of 20% ammonia water;
③, open and adjust 20% aqueous ammonia storage tank regulating valve 7, carry 20% aqueous ammonia to 20% aqueous ammonia storage tank 9, according to the 9 liquid level condition of 20% aqueous ammonia storage tank, open 20% ammonia pump 10, carry 20% aqueous ammonia to boiler denitrification facility.
(III) the working mode of the system only producing 8% ammonia water:
①, closing the 20% ammonia water flow regulating valve 7;
②, supplying water by a desalted water pipe network, opening and adjusting a desalted water flow regulating valve 2 and a desalted water flow meter 24 of an ammonia absorber, opening and adjusting a liquid ammonia pressure regulating valve 5 and a liquid ammonia flow meter 23 of the ammonia absorber, and adjusting the amount of the circulating water according to the outlet temperature of 20% ammonia water;
③, opening and adjusting the desalted water flow control valve 12 at the inlet of the mixer and the flow meter 25 of the desalted water, opening and adjusting the flow control valve 13 of 20% ammonia water at the inlet of the mixer and the flow meter 27 of 20% ammonia water in the mixer, conveying 8% ammonia water to the 8% ammonia water storage tank 16, opening the 8% ammonia water pump 17 according to the liquid level condition of the 8% ammonia water storage tank 16, and conveying 8% ammonia water to the boiler desulfurization device.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The ammonia water preparation system capable of simultaneously preparing ammonia water with two concentrations is characterized by comprising an ammonia absorber, a mixer, a 20% ammonia water storage tank, an 8% ammonia water storage tank, a liquid ammonia inlet pipeline and a desalted water inlet main pipeline, wherein the liquid ammonia inlet pipeline is arranged at one side of the lower part of the ammonia absorber and is communicated with the ammonia absorber; a 20% ammonia water outlet main pipeline is arranged at the other side of the lower part of the ammonia absorber, and the ammonia absorber is communicated with the 20% ammonia water outlet main pipeline;
the 20% ammonia water outlet main pipeline is divided into two branches, wherein one branch is a 20% ammonia water storage tank branch pipeline, and the 20% ammonia water storage tank branch pipeline is communicated with a 20% ammonia water storage tank; the other path is a branch pipeline of 20% ammonia water at the inlet of the mixer, and the branch pipeline of 20% ammonia water at the inlet of the mixer is communicated with the mixer;
the main pipeline of the desalted water inlet is arranged at one side of the upper part of the ammonia absorber, and the main pipeline of the desalted water inlet is divided into two branches: one branch pipeline is a desalted water inlet branch pipeline which is communicated with an ammonia absorber; the other branch pipeline is a desalted water branch pipeline at the inlet of the mixer, and the desalted water branch pipeline at the inlet of the mixer is communicated with the mixer; the mixer is communicated with the 8% ammonia water storage tank through a pipeline of the 8% ammonia water storage tank.
2. An ammonia water preparation system capable of simultaneously preparing ammonia water with two concentrations according to claim 1, wherein the ammonia liquid inlet pipeline is provided with an ammonia intake device liquid ammonia pressure regulating valve and a liquid ammonia flow meter, and the ammonia intake device liquid ammonia pressure regulating valve and the liquid ammonia flow meter are used for controlling the pressure and the flow of the liquid ammonia entering the ammonia intake device.
3. An ammonia water preparation system capable of simultaneously preparing ammonia water with two concentrations according to claim 1 or 2, wherein the desalted water inlet branch pipeline is provided with an ammonia intake device desalted water flow regulating valve and a desalted water intake device flow meter, and the ammonia intake device desalted water flow regulating valve and the desalted water intake device flow meter are used for controlling the pressure and the flow of the desalted water entering the ammonia intake device.
4. An ammonia water preparation system capable of simultaneously preparing ammonia water of two concentrations as defined in claim 3 wherein the mixer inlet desalted water branch line is provided with a mixer inlet desalted water flow rate regulating valve and a desalted water inlet mixer flow meter, the mixer inlet desalted water flow rate regulating valve and the desalted water inlet mixer flow meter are used for controlling the pressure and flow rate of desalted water inlet into the mixer.
5. The system of claim 4, wherein the 20% ammonia storage tank branch line is provided with a 20% ammonia flow control valve and a 20% ammonia-in 20% ammonia storage tank flow meter, and the 20% ammonia flow control valve and the 20% ammonia-in 20% ammonia storage tank flow meter are used for controlling the pressure and flow of 20% ammonia-in 20% ammonia storage tank.
6. An ammonia water preparation system capable of simultaneously preparing ammonia water with two concentrations as claimed in claim 5, wherein the mixer inlet 20% ammonia water branch pipeline is provided with a mixer inlet 20% ammonia water flow regulating valve and a 20% ammonia water inlet mixer flowmeter, and the mixer inlet 20% ammonia water flow regulating valve and the 20% ammonia water inlet mixer flowmeter are used for controlling the pressure and the flow of the 20% ammonia water entering the mixer.
7. An ammonia water preparation system capable of simultaneously preparing ammonia water with two concentrations according to claim 6, wherein a circulating water inlet pipeline and a circulating water return pipeline are arranged on one side of the ammonia absorber, and the circulating water inlet pipeline, the ammonia absorber and the circulating water return pipeline are sequentially communicated.
8. The system for preparing ammonia water capable of simultaneously preparing ammonia water of two concentrations according to claim 7, wherein the ammonia absorber is cylindrical, and the desalted water inlet branch pipe is communicated with a venturi ejector at the upper part of the ammonia absorber; the circulating water return pipeline is communicated with a Venturi ejector at the upper part of the ammonia absorber;
the high-temperature ammonia water and circulating water heat exchanger in the middle of the ammonia absorber adopts a tubular structure, the tube pass of the tubular high-temperature ammonia water and circulating water heat exchanger is the high-temperature ammonia water, and the high-temperature ammonia water flows from top to bottom; the shell pass of the tubular high-temperature ammonia water and circulating water heat exchanger is circulating water which flows from bottom to top; the circulating water inlet pipeline is communicated with the high-temperature ammonia water in the middle of the ammonia absorber and a circulating water inlet of the circulating water heat exchanger;
the high-temperature ammonia water and liquid ammonia heat exchanger at the lower part of the ammonia absorber adopts a tubular structure, the inlets of the high-temperature ammonia water and liquid ammonia heat exchanger at the lower part of the ammonia absorber with the tubular structure are communicated with a liquid ammonia inlet pipeline, and the outlets of the high-temperature ammonia water and liquid ammonia heat exchanger at the lower part of the ammonia absorber with the tubular structure are respectively communicated with a 20% ammonia water storage tank and a mixer; the tube pass of the high-temperature ammonia water and liquid ammonia heat exchanger is high-temperature ammonia water which flows from top to bottom; the shell side of the high-temperature ammonia water and liquid ammonia heat exchanger is liquid ammonia and flows from bottom to top.
9. The system of claim 8, wherein the 20% ammonia water storage tank is provided with a 20% ammonia water outlet line at a lower end thereof, the 20% ammonia water outlet line is provided with a 20% ammonia water pump, and the 20% ammonia water pump is used for pumping the 20% ammonia water from the 20% ammonia water storage tank to a process of removing the ammonia water by using the 20% ammonia water through the 20% ammonia water outlet line.
10. The system of claim 9, wherein the 8% ammonia water storage tank is provided with an 8% ammonia water output pipeline at a lower end thereof, the 8% ammonia water output pipeline is provided with an 8% ammonia water pump, and the 8% ammonia water pump is used for pumping 8% ammonia water from the 8% ammonia water storage tank to a desulfurization process by using the 8% ammonia water through the 8% ammonia water output pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920891245.6U CN210261140U (en) | 2019-06-12 | 2019-06-12 | Ammonia water preparation system capable of simultaneously preparing ammonia water with two concentrations |
Applications Claiming Priority (1)
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| CN116443891A (en) * | 2023-02-16 | 2023-07-18 | 宜兴市华瑞焚烧炉科技发展有限公司 | System for preparing ammonia water from liquid ammonia |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116443891A (en) * | 2023-02-16 | 2023-07-18 | 宜兴市华瑞焚烧炉科技发展有限公司 | System for preparing ammonia water from liquid ammonia |
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