Tail gas recovery device for ammonia water storage tank

Abstract

The utility model relates to the technical field of chemical production auxiliary equipment, and discloses an ammonia water storage tank tail gas recovery device which comprises a storage tank, and a fixed pipe is fixedly sleeved in the top end of the storage tank. According to the tail gas recovery device for the ammonia water storage tank, the pressure sensor is arranged in the ammonia water storage tank, the pressure change in the tank can be monitored in real time, when the pressure reaches a preset threshold value, the air pump on the air conveying pipe is automatically started, and ammonia gas generated by volatilization is discharged into the mixing tank containing water; according to the invention, effective recovery of ammonia gas is realized, unorganized emission of ammonia gas is reduced, utilization rate of ammonia water is improved, cyclic utilization of resources is realized, harm of ammonia gas to surrounding environment and personnel health is reduced, production cost of enterprises is reduced, environmental protection requirements are met, green production of the enterprises is realized, and environmental protection image of the enterprises is improved.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment technology for chemical production, and more specifically, to an ammonia storage tank tail gas recovery device. Background Technology

[0002] Ammonia water is widely used as an important industrial raw material and chemical in many fields such as chemical industry, environmental protection, and agriculture, in fertilizer production, flue gas denitrification, and sewage treatment. However, ammonia water is highly volatile. During storage, ammonia gas continuously escapes from the liquid phase and accumulates inside the storage tank. In a sealed environment, the ammonia gas will continue to volatilize, and if it is not depressurized in time, it may cause an explosion. At present, most ammonia water storage tanks do not effectively recover and treat this volatilized ammonia gas, resulting in the direct emission of ammonia gas into the atmosphere. This not only wastes ammonia resources and increases production costs, but also pollutes the environment. Ammonia gas is one of the air pollutants and has a negative impact on air quality and ecosystems. For example, in some fertilizer production plants, due to the failure to recover the tail gas from a large number of ammonia water storage tanks, the concentration of ammonia gas in the air around the plant area often exceeds environmental standards. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides an ammonia storage tank tail gas recovery device, which has the advantage of automatically recovering ammonia gas and dissolving it in water.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an ammonia storage tank tail gas recovery device, comprising:

[0005] A storage tank, wherein a fixing tube is fixedly sleeved inside the top of the storage tank;

[0006] The recycling mechanism is disposed on the outer surface of the fixed tube;

[0007] The recycling mechanism includes a fixed sleeve, the inside of which is fixedly connected to the outer surface of a fixed tube. A pressure sensor is installed inside the fixed sleeve. An air supply pipe is fixedly connected to the inside of the outer surface of the fixed sleeve. An air pump is installed on the air supply pipe. A mixing tank is fixedly connected to the end of the air supply pipe away from the fixed sleeve. A tuning fork density meter is installed inside the mixing tank. A water inlet pipe is fixedly connected to the inside of the top of the mixing tank. A first valve is installed on the outer surface of the water inlet pipe.

[0008] As a preferred embodiment of this utility model, a return pipe is fixedly sleeved inside the bottom of the mixing tank, and the end of the return pipe away from the mixing tank is fixedly sleeved inside the outer surface of the storage tank. A water pump is installed on the return pipe.

[0009] As a preferred embodiment of this utility model, an inlet pipe is fixedly connected to the inner part of the top of the fixed sleeve, and a second valve is provided on the inlet pipe.

[0010] As a preferred embodiment of this utility model, a liquid outlet pipe is fixedly connected to the bottom of the storage tank, and a third valve is provided on the liquid outlet pipe.

[0011] As a preferred embodiment of this utility model, a motor is fixedly installed at the top of the mixing tank, a rotating shaft is fixedly sleeved at the output end of the motor, and a stirring blade is fixedly sleeved on the outer surface of the rotating shaft.

[0012] As a preferred embodiment of this utility model, the outer surface of the mixing tank is fixedly fitted with an insulation layer, the insulation layer is made of insulation material, and a protective shell is fixedly fitted onto the outer surface of the insulation layer.

[0013] As a preferred embodiment of this utility model, a fixing frame is fixedly fitted onto the outer surface of both the storage tank and the protective shell, and a base plate is fixedly installed at the bottom end of the fixing frame.

[0014] As a preferred embodiment of this utility model, a reinforcing rod is fixedly installed on the outer surface of the fixing frame, and a controller is provided on the fixing frame.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This ammonia storage tank tail gas recovery device, by installing a pressure sensor inside the ammonia storage tank, can monitor the pressure changes inside the tank in real time. When the pressure reaches a preset threshold, the gas pump on the gas delivery pipe is automatically turned on to discharge the volatilized ammonia gas into a mixing tank containing water. Utilizing the characteristic that ammonia gas is easily soluble in water, the device achieves effective recovery of ammonia gas, reduces fugitive emissions of ammonia gas, improves the utilization rate of ammonia water, realizes resource recycling, reduces the harm of ammonia gas to the surrounding environment and human health, reduces enterprise production costs, meets environmental protection requirements, helps enterprises achieve green production, and enhances the enterprise's environmental image.

[0017] 2. This ammonia storage tank tail gas recovery device, through the stirring blades installed in the mixing tank to fully stir the gas and liquid phases, greatly increases the contact area and mixing frequency between ammonia and water, significantly accelerates the ammonia dissolution process, shortens the tail gas recovery time, and greatly improves the tail gas recovery efficiency, ensuring that ammonia can be absorbed quickly and fully. Furthermore, the tuning fork density meter installed in the mixing tank can monitor the ammonia concentration in the mixing tank in real time and accurately. When the ammonia concentration in the mixing tank is equivalent to that in the storage tank, the reflux mechanism is automatically triggered to return the ammonia in the mixing tank to the storage tank, realizing closed-loop recovery of ammonia, ensuring the quality of the recovered ammonia, while avoiding the errors and inconveniences of manual monitoring and operation, and improving the automation level and operational stability of the recovery system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a cross-sectional view of the fixing sleeve of this utility model;

[0021] Figure 4 This is a cross-sectional view of the mixing tank of this utility model;

[0022] Figure 5 This is a cross-sectional view of the reflux pipe of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the insulation layer of this utility model.

[0024] In the diagram: 1. Storage tank; 2. Fixed pipe; 3. Fixed sleeve; 4. Pressure sensor; 5. Gas supply pipe; 6. Air pump; 7. Mixing tank; 8. Tuning fork densitometer; 9. Water inlet pipe; 10. First valve; 11. Return pipe; 12. Water pump; 13. Liquid inlet pipe; 14. Second valve; 15. Liquid outlet pipe; 16. Third valve; 17. Motor; 18. Rotating shaft; 19. Stirring blade; 20. Insulation layer; 21. Protective shell; 22. Fixing frame; 23. Base plate; 24. Controller; 25. Reinforcing rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1 to 6 As shown, this utility model provides an ammonia storage tank tail gas recovery device, comprising:

[0027] Storage tank 1, with a fixed tube 2 fixedly connected to the inside of the top of storage tank 1;

[0028] The recycling mechanism is located on the outer surface of the fixed tube 2;

[0029] The recycling mechanism includes a fixed sleeve 3, the inside of which is fixedly connected to the outer surface of the fixed pipe 2. A pressure sensor 4 is installed inside the fixed sleeve 3. An air supply pipe 5 is fixedly connected to the inside of the outer surface of the fixed sleeve 3. An air pump 6 is installed on the air supply pipe 5. A mixing tank 7 is fixedly connected to the end of the air supply pipe 5 away from the fixed sleeve 3. A tuning fork density meter 8 is installed inside the mixing tank 7. A water inlet pipe 9 is fixedly connected to the inside of the top of the mixing tank 7. A first valve 10 is installed on the outer surface of the water inlet pipe 9.

[0030] During the storage of ammonia water in storage tank 1, ammonia gas will continuously evaporate, and the pressure inside storage tank 1 will continuously increase. Due to the design of the tuning fork densitometer 8, the pressure inside storage tank 1 can be monitored in real time. When the pressure inside storage tank 1 reaches the threshold of the tuning fork densitometer 8, the air pump 6 will run, transporting the ammonia gas inside storage tank 1 to the inside of mixing tank 7 through the air supply pipe 5. Due to the design of the water inlet pipe 9, the operator can add water to the inside of mixing tank 7 through the water inlet pipe 9. Due to the design of the first valve 10, the operator can easily control the opening and closing of the water inlet pipe 9. Since ammonia gas is easily soluble in water, it will mix with water when it enters the inside of mixing tank 7. Due to the design of the tuning fork densitometer 8, the concentration of ammonia water inside mixing tank 7 can be monitored in real time.

[0031] The bottom of the mixing tank 7 is fixedly connected to the internal reflux pipe 11. The end of the reflux pipe 11 away from the mixing tank 7 is fixedly connected to the internal reflux pipe 1 on the outer surface of the storage tank 1. A water pump 12 is installed on the reflux pipe 11.

[0032] When the tuning fork density meter 8 detects that the concentration of ammonia in the mixing tank 7 is equivalent to that in the storage tank 1, the water pump 12 will move. At this time, the water pump 12 will drive the ammonia in the mixing tank 7 to flow back into the storage tank 1.

[0033] The top of the fixed sleeve 3 is internally fixedly connected to the liquid inlet pipe 13, and the liquid inlet pipe 13 is provided with a second valve 14.

[0034] The design of the inlet pipe 13 allows operators to fill ammonia into the storage tank 1 through the inlet pipe 13, and the design of the second valve 14 makes it easy for operators to control the opening and closing of the inlet pipe 13.

[0035] The storage tank 1 has an internally fixed outlet pipe 15 at the bottom, and a third valve 16 is installed on the outlet pipe 15.

[0036] Due to the design of the third valve 16, it will be convenient for operators to control the opening and closing of the outlet pipe 15. When the outlet pipe 15 is in the open state, the ammonia water inside the storage tank 1 can be discharged from the storage tank 1 through the outlet pipe 15.

[0037] Among them, a motor 17 is fixedly installed at the top of the mixing tank 7, a rotating shaft 18 is fixedly sleeved at the output end of the motor 17, and a stirring blade 19 is fixedly sleeved on the outer surface of the rotating shaft 18.

[0038] When the motor 17 is running, the shaft 18 will drive the stirring blade 19 to rotate. At this time, the stirring blade 19 will stir the ammonia water inside the mixing tank 7, thereby increasing the fusion efficiency of ammonia and water.

[0039] Among them, the outer surface of the mixing tank 7 is fixedly fitted with an insulation layer 20, which is made of insulation material, and the outer surface of the insulation layer 20 is fixedly fitted with a protective shell 21.

[0040] Due to the design of the insulation layer 20, it can provide insulation and heat insulation for the mixing tank 7, ensuring the stability of the internal temperature of the mixing tank 7 and reducing the volatilization rate of ammonia. Due to the design of the protective shell 21, it can provide good protection for the insulation layer 20 and the mixing tank 7.

[0041] The outer surfaces of both the storage tank 1 and the protective shell 21 are fixedly fitted with a fixing frame 22, and the bottom end of the fixing frame 22 is fixedly installed with a base plate 23.

[0042] Due to the design of the fixing frame 22 and the base plate 23, the device can be well supported, allowing the device to be placed stably on the ground.

[0043] The outer surface of the fixing frame 22 is fixedly installed with a reinforcing rod 25, and the fixing frame 22 is equipped with a controller 24.

[0044] The design of the reinforcing rod 25 will enhance the structural strength of the fixing frame 22.

[0045] Working principle and usage process of this utility model:

[0046] When the operator needs to store ammonia, firstly, the operator opens the second valve 14, and then pours the ammonia into the storage tank 1 through the inlet pipe 13. When the second valve 14 is closed, the storage tank 1 is sealed. When the operator needs to drain the ammonia from the storage tank 1, the operator opens the third valve 16, and the ammonia in the storage tank 1 flows out through the outlet pipe 15. During the storage of ammonia, because ammonia is a mixture of ammonia and water, it has... Due to its volatility, as ammonia continues to evaporate, the internal pressure of storage tank 1 will continue to increase. Due to the design of pressure sensor 4, the pressure can be continuously monitored. When the internal pressure of storage tank 1 reaches the threshold set by pressure sensor 4, pressure sensor 4 will send a signal to controller 24. At this time, controller 24 will simultaneously send signals to air pump 6 and motor 17 to make air pump 6 and motor 17 run. At this time, air pump 6 will drive the ammonia inside storage tank 1 to flow into the interior of mixing tank 7 through gas pipe 5, so as to avoid excessive gas pressure and cause tank explosion.

[0047] When the operator opens the first valve 10, the operator can add water to the mixing tank 7 through the water inlet pipe 9. Therefore, when the ammonia enters the mixing tank 7, it will immediately come into contact with the water inside the mixing tank 7. Since ammonia is easily soluble in water, it will dissolve in the water when it comes into contact with it. When the motor 17 runs, the rotating shaft 18 will drive several sets of stirring blades 19 to rotate. At this time, the stirring blades 19 will stir the water inside the mixing tank 7 to accelerate the efficiency of ammonia and water fusion, thereby realizing the function of automatically recovering ammonia and dissolving it in water.

[0048] Due to the design of the tuning fork densitometer 8, the ammonia concentration inside the mixing tank 7 can be continuously monitored. When the ammonia concentration inside the mixing tank 7 is equivalent to that inside the storage tank 1, the tuning fork densitometer 8 will send a signal to the controller 24. At this time, the controller 24 will control the water pump 12 to run. Subsequently, the ammonia inside the mixing tank 7 will flow back to the storage tank 1 through the return pipe 11 to complete the recovery. Since the evaporation rate of ammonia is closely related to temperature, the evaporation rate of ammonia increases significantly when the temperature rises. Due to the design of the insulation layer 20, the mixing tank 7 can be insulated, so that the interior of the mixing tank 7 will not be disturbed by the external temperature, maintaining the stability of the internal environment of the mixing tank 7 and reducing the evaporation rate of ammonia.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for recovering tail gas from an ammonia storage tank, characterized in that, Including: Storage tank (1), with a fixed tube (2) fixedly sleeved inside the top of the storage tank (1); A recycling mechanism is disposed on the outer surface of the fixed tube (2); The recycling mechanism includes a fixed sleeve (3), the inside of which is fixedly connected to the outer surface of the fixed tube (2), a pressure sensor (4) is provided inside the fixed sleeve (3), an air supply pipe (5) is fixedly connected inside the outer surface of the fixed sleeve (3), an air pump (6) is provided on the air supply pipe (5), a mixing tank (7) is fixedly connected to the end of the air supply pipe (5) away from the fixed sleeve (3), a tuning fork densitometer (8) is provided inside the mixing tank (7), a water inlet pipe (9) is fixedly connected to the top of the mixing tank (7), and a first valve (10) is provided on the outer surface of the water inlet pipe (9).

2. The ammonia storage tank tail gas recovery device according to claim 1, characterized in that: A return pipe (11) is fixedly sleeved inside the bottom of the mixing tank (7). The end of the return pipe (11) away from the mixing tank (7) is fixedly sleeved inside the outer surface of the storage tank (1). A water pump (12) is installed on the return pipe (11).

3. The ammonia storage tank tail gas recovery device according to claim 1, characterized in that: The top of the fixed sleeve (3) is internally fixedly connected to an inlet pipe (13), and a second valve (14) is provided on the inlet pipe (13).

4. The ammonia storage tank tail gas recovery device according to claim 1, characterized in that: The storage tank (1) is fixedly fitted with an outlet pipe (15) at the bottom end, and a third valve (16) is provided on the outlet pipe (15).

5. The ammonia storage tank tail gas recovery device according to claim 1, characterized in that: A motor (17) is fixedly installed at the top of the mixing tank (7), and a rotating shaft (18) is fixedly sleeved at the output end of the motor (17). A stirring blade (19) is fixedly sleeved on the outer surface of the rotating shaft (18).

6. The ammonia storage tank tail gas recovery device according to claim 1, characterized in that: The outer surface of the mixing tank (7) is fixedly fitted with an insulation layer (20), which is made of insulation material, and a protective shell (21) is fixedly fitted on the outer surface of the insulation layer (20).

7. The ammonia storage tank tail gas recovery device according to claim 1, characterized in that: The outer surfaces of the storage tank (1) and the protective shell (21) are both fixedly fitted with a fixing frame (22), and a base plate (23) is fixedly installed at the bottom end of the fixing frame (22).

8. The ammonia storage tank tail gas recovery device according to claim 7, characterized in that: A reinforcing rod (25) is fixedly installed on the outer surface of the fixing frame (22), and a controller (24) is provided on the fixing frame (22).

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