Water bath type ammonia water evaporator for ammonia water processing

Abstract

The utility model relates to the technical field of ammonia water evaporators, and discloses a water bath type ammonia water evaporator for ammonia water processing, which comprises a barrel body, a central barrel is arranged in the barrel body, a liquid ammonia coil pipe is wound outside the central barrel, a gas-liquid separator is arranged in the central barrel, and a water bath is arranged in the gas-liquid separator. An ammonia gas outlet pipe is arranged at one end, extending out of the top of the cylinder body, of the central cylinder; the aeration pipes are arranged on the front side and the rear side of the interior of the barrel, a plurality of aeration nozzles distributed at equal intervals are arranged outside the aeration pipes, an ultrasonic generator and a high-pressure fan are arranged on one side of the exterior of the barrel, and the output end of the high-pressure fan is connected with the input ends of the aeration pipes; and the ultrasonic transducers are arranged on the left side and the right side in the cylinder body. According to the utility model, the ultrasonic structure and the aeration structure are arranged, and the descaling agent is matched, so that the scale outside the liquid ammonia coil is more convenient and quicker to clean.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonia water evaporators, in particular to a water bath type ammonia water evaporator used for ammonia water processing. Background Art

[0002] Flue gas denitrification is another key area for the country to control pollutant emissions from thermal power plants after flue gas desulfurization. Nitrogen oxides can cause direct harm to human health, and participate in the formation of photochemical smog, acid rain, and environmental pollution. In addition, nitrous oxide is a greenhouse gas that destroys the ozone layer. With the development of society, the requirements for nitrogen oxide emissions from thermal power plants have been greatly improved. Ammonia is mainly used as a reducing agent for flue gas denitrification in thermal power plants, and nitrogen oxides are converted into harmless nitrogen and water vapor through ammonia. Ammonia is mainly formed by the evaporation of liquid ammonia.

[0003] For example, the Chinese authorized patent with announcement number CN 205730412 U (a liquid ammonia evaporation device): includes a cylinder; a central cylinder and a liquid ammonia coil, both of which are arranged inside the cylinder, the liquid ammonia coil is coiled around the central cylinder, a gas-liquid separator is provided in the central cylinder, an ammonia outlet pipe is provided at the top of the central cylinder, and the bottom end of the liquid ammonia coil is connected to the liquid ammonia inlet; the top of the liquid ammonia coil is connected to the central cylinder, and the bottom end of the central cylinder is connected to the liquid ammonia discharge port through a liquid ammonia discharge pipe; a steam emitter and an electric heater are respectively arranged at the bottom of the cylinder; the cylinder is filled with water, a water replenishment port is provided at the top of the cylinder, an overflow port is provided at the top of the cylinder wall of the cylinder, and a sewage outlet is provided at the bottom of the cylinder; a circulating pump is provided outside the cylinder.

[0004] Scale will form on the outside of the liquid ammonia coil in the above-mentioned prior art because minerals in the water, especially hardness components such as calcium and magnesium, may be deposited on the surface of the coil during the heating process to form scale. The formation of scale will not only affect the heat transfer efficiency and reduce the performance of the evaporator, but also be difficult to clean. For this reason, a water bath ammonia evaporator for ammonia processing is proposed. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies of the prior art, the utility model provides a water bath ammonia evaporator for ammonia processing to solve the problem that the scale on the outside of the liquid ammonia coil is difficult to clean as mentioned in the background art.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a water bath ammonia evaporator for ammonia processing, comprising:

[0009] A cylinder, wherein a central cylinder is arranged inside the cylinder, a liquid ammonia coil is wound outside the central cylinder, a gas-liquid separator is arranged inside the central cylinder, and an ammonia outlet pipe is arranged at one end of the central cylinder extending outside the top of the cylinder;

[0010] An aeration pipe is arranged at the front and rear sides of the cylinder body, and a plurality of aeration nozzles are arranged at equal intervals on the outside of the aeration pipe. An ultrasonic generator and a high-pressure fan are arranged on one side of the outside of the cylinder body, and the output end of the high-pressure fan is connected to the input end of the aeration pipe;

[0011] The ultrasonic transducer is arranged on the left and right sides of the cylinder body. A waste discharge pipe is arranged on one side of the lower end of the cylinder body, and a reagent input pipe is arranged on the left side of the upper end of the cylinder body. The reagent input pipe is used for inputting the descaling agent.

[0012] Preferably, a lower straight pipe is provided at the lower end of the liquid ammonia coil, and the lower straight pipe is communicated with the liquid ammonia coil, and a liquid ammonia discharge pipe is provided on the right side of the upper end of the cylinder, and the liquid ammonia discharge pipe is communicated with the lower straight pipe.

[0013] Preferably, an upper straight pipe is provided at the upper end of the liquid ammonia coil, and the upper straight pipe is connected to the liquid ammonia coil, and the upper straight pipe is connected to the central tube, and a liquid ammonia discharge pipe is provided on one side of the upper end of the cylinder, and the liquid ammonia discharge pipe is connected to the upper straight pipe.

[0014] Preferably, an electric heater and a steam emitter are sequentially arranged at the lower end of the inner part of the cylinder from bottom to top, the input end of the steam emitter is connected to the steam inlet, and the steam emitter is used to heat the liquid ammonia.

[0015] Preferably, a liquid level switch is provided at the connection between the ammonia outlet pipe and the central tube, and a temperature transmitter and a pressure gauge are provided inside the ammonia outlet pipe.

[0016] Preferably, a safety valve is installed on one side of the outer part of the central cylinder located at the upper end of the cylinder body, and a liquid level gauge is installed on the left side of the outer part of the cylinder body, and the liquid level gauge is used to detect the height of the liquid level inside the cylinder body.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a water bath ammonia evaporator for ammonia processing, which has the following beneficial effects:

[0019] The utility model adds descaling agent and clean water through a reagent input pipe, and then starts a high-pressure fan and an ultrasonic generator. The high-pressure fan performs aeration through an aeration pipe and an aeration nozzle. The aeration structure can promote the oxidation and decomposition of scale by increasing the oxygen content in the water. The ultrasonic generator generates ultrasonic vibration through an ultrasonic transducer. The tiny vortex and compression expansion effect generated by the ultrasonic vibration in the water can effectively decompose and remove scale. In summary, the scale on the outside of the liquid ammonia coil is quickly removed, and the wastewater can be discharged through the waste pipe, thereby solving the problems raised in the background technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0021] Figure 2 This is a cross-sectional view of the internal structure of the cylinder of the utility model;

[0022] Figure 3 It is a bottom view of the overall structure of the utility model.

[0023] In the figure: 1. Cylinder; 2. Central cylinder; 3. Liquid ammonia coil; 4. Liquid level switch; 5. Ammonia outlet pipe; 6. Safety valve; 7. Upper straight pipe; 8. Lower straight pipe; 9. Liquid ammonia discharge pipe; 10. Liquid ammonia discharge pipe; 11. Liquid level gauge; 12. Ultrasonic transducer; 13. Aeration pipe; 14. Aeration nozzle; 15. Steam emitter; 16. Electric heater; 17. Waste discharge pipe; 18. Ultrasonic generator; 19. High-pressure fan; 20. Drug input pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model provides a technical solution, a water bath ammonia evaporator for ammonia processing, please refer to Figure 1 , Figure 2 and Figure 3 ,include:

[0026] A cylinder 1, a central cylinder 2 is arranged inside the cylinder 1, a liquid ammonia coil 3 is wound outside the central cylinder 2, a gas-liquid separator is arranged inside the central cylinder 2, and an ammonia outlet pipe 5 is arranged at one end of the central cylinder 2 extending outside the top of the cylinder 1;

[0027] An aeration pipe 13 is arranged at the front and rear sides of the cylinder 1. A plurality of equally spaced aeration nozzles 14 are arranged outside the aeration pipe 13. An ultrasonic generator 18 and a high-pressure fan 19 are arranged on one side outside the cylinder 1. The output end of the high-pressure fan 19 is connected to the input end of the aeration pipe 13.

[0028] The ultrasonic transducer 12 is arranged on the left and right sides of the cylinder 1. A waste pipe 17 is arranged on one side of the lower end of the cylinder 1. A reagent injection pipe 20 is arranged on the left side of the upper end of the cylinder 1. The reagent injection pipe 20 is used for injecting descaling agent.

[0029] See also Figure 1 and Figure 2 A lower straight pipe 8 is provided at the lower end of the liquid ammonia coil 3, and the lower straight pipe 8 is connected to the liquid ammonia coil 3. A liquid ammonia discharge pipe 10 is provided on the right side of the upper end of the cylinder 1, and the liquid ammonia discharge pipe 10 is connected to the lower straight pipe 8.

[0030] See also Figure 1 and Figure 2 An upper straight pipe 7 is provided at the upper end of the liquid ammonia coil 3, and the upper straight pipe 7 is connected to the liquid ammonia coil 3, and the upper straight pipe 7 is connected to the central tube 2. A liquid ammonia discharge pipe 9 is provided on one side of the upper end of the cylinder body 1, and the liquid ammonia discharge pipe 9 is connected to the upper straight pipe 7.

[0031] See also Figure 1 and Figure 2 The lower end of the cylinder 1 is provided with an electric heater 16 and a steam emitter 15 in sequence from bottom to top. The input end of the steam emitter 15 is connected to the steam inlet, and the steam emitter 15 is used to heat the liquid ammonia.

[0032] See also Figure 1 and Figure 2 A liquid level switch 4 is provided at the connection between the ammonia outlet pipe 5 and the central tube 2, and a temperature transmitter and a pressure gauge are provided inside the ammonia outlet pipe 5.

[0033] See also Figure 1 , Figure 2 and Figure 3 A safety valve 6 is installed on one side of the upper end of the cylinder 1 outside the central cylinder 2, and a liquid level gauge 11 is installed on the left side outside the cylinder 1. The liquid level gauge 11 is used to detect the liquid level height inside the cylinder 1.

[0034] In this solution, liquid ammonia is introduced into the liquid ammonia coil 3 through the liquid ammonia discharge pipe 10, and the liquid ammonia coil 3 is immersed in a water bath. The liquid ammonia absorbs the heat of the warm water and then vaporizes into ammonia gas. The ammonia gas is removed from the heavy components and other impurities by the air pressure separator in the central tube 2 and discharged from the ammonia outlet pipe 5. When it is necessary to descale the liquid ammonia coil 3, a descaling agent and clean water are added through the agent input pipe 20, and then the high-pressure fan 19 and the ultrasonic generator 18 are started. The high-pressure fan 19 performs aeration through the aeration pipe 13 and the aeration nozzle 14. The aeration structure can promote the oxidation and decomposition of scale by increasing the oxygen content in the water. The ultrasonic generator 18 generates ultrasonic vibration through the ultrasonic transducer 12. The tiny vortex and compression expansion effect generated by the ultrasonic vibration in the water can effectively decompose and remove the scale. In summary, the scale on the outside of the liquid ammonia coil 3 is quickly removed, and then the wastewater can be discharged through the waste pipe 17.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water bath ammonia evaporator for ammonia processing, characterized in that: include: A cylinder (1), wherein a central cylinder (2) is arranged inside the cylinder (1), a liquid ammonia coil (3) is arranged outside the central cylinder (2), a gas-liquid separator is arranged inside the central cylinder (2), and an ammonia outlet pipe (5) is arranged at one end of the central cylinder (2) extending outside the top of the cylinder (1); An aeration pipe (13) is arranged at the front and rear sides of the cylinder (1), and a plurality of aeration nozzles (14) are arranged at equal intervals outside the aeration pipe (13). An ultrasonic generator (18) and a high-pressure fan (19) are arranged on one side outside the cylinder (1), and an output end of the high-pressure fan (19) is connected to an input end of the aeration pipe (13); The ultrasonic transducer (12) is arranged on the left and right sides of the cylinder (1), a waste discharge pipe (17) is arranged on one side of the lower end of the cylinder (1), and a medicine input pipe (20) is arranged on the left side of the upper end of the cylinder (1).

2. The water bath ammonia evaporator for ammonia processing according to claim 1, characterized in that: A lower straight pipe (8) is provided at the lower end of the liquid ammonia coil (3), and the lower straight pipe (8) is connected to the liquid ammonia coil (3); a liquid ammonia discharge pipe (10) is provided on the right side of the upper end of the cylinder (1), and the liquid ammonia discharge pipe (10) is connected to the lower straight pipe (8).

3. The water bath ammonia evaporator for ammonia processing according to claim 2, characterized in that: An upper straight pipe (7) is provided at the upper end of the liquid ammonia coil (3), and the upper straight pipe (7) is connected to the liquid ammonia coil (3), and the upper straight pipe (7) is connected to the central cylinder (2); a liquid ammonia discharge pipe (9) is provided on one side of the upper end of the cylinder (1), and the liquid ammonia discharge pipe (9) is connected to the upper straight pipe (7).

4. The water bath ammonia evaporator for ammonia processing according to claim 1, characterized in that: An electric heater (16) and a steam emitter (15) are arranged in sequence from bottom to top at the lower end of the interior of the cylinder (1), and the input end of the steam emitter (15) is connected to the steam inlet.

5. The water bath ammonia evaporator for ammonia processing according to claim 1, characterized in that: A liquid level switch (4) is provided at the connection between the ammonia outlet pipe (5) and the central tube (2), and a temperature transmitter and a pressure gauge are provided inside the ammonia outlet pipe (5).

6. The water bath ammonia evaporator for ammonia processing according to claim 1, characterized in that: A safety valve (6) is installed on one side of the outer side of the central cylinder (2) located at the upper end of the cylinder body (1), and a liquid level gauge (11) is installed on the left side of the outer side of the cylinder body (1).

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