Storage tank for nitric acid production

Abstract

The utility model relates to the technical field of chemical equipment, in particular to a storage tank for nitric acid production. Comprising a tank body, a breather valve is arranged at the top of the tank body, a floating plate is arranged in the tank body, an air bag is arranged on the outer surface of the floating plate, a hose is connected to the top wall of the tank body, the end of the hose is connected with the air bag, an inflation mechanism communicated with the hose is arranged at the top of the tank body, and a liquid outlet pipe is installed on the outer surface, close to the bottom, of the tank body; a liquid inlet pipe is arranged on the outer surface, close to the top, of the tank body; the end part of the liquid inlet pipe and the inner wall of the tank body are jointly provided with a shunting mechanism. According to the storage tank for nitric acid production, due to the arrangement of the floating plate, nitric acid can be prevented from making contact with air above the storage tank, and due to the fact that a gap is formed between the floating plate and the inner wall of the tank body, the air bag is inflated through the inflation mechanism and made to expand, the gap can be sealed through the air bag, and it is ensured that air cannot make contact with nitric acid; the problem that the nitric acid concentration is reduced is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical equipment technical field especially relates to a storage tank for nitric acid production. BACKGROUND

[0002] As an important chemical raw material, nitric acid has a wide range of applications in chemical industry, metallurgy, dyes, medicine and many other fields. In the production process of nitric acid, the storage tank for nitric acid production plays a crucial role. It is a key equipment for storing nitric acid products and ensuring the connection of materials between production and use.

[0003] When the liquid level in the storage tank decreases, in order to protect the normal pressure in the tank, the outside air will enter the tank through the breather valve. Since nitric acid is volatile, when it comes into contact with air, nitric acid molecules will continuously volatilize from the liquid phase to the gas phase, resulting in a decrease in the concentration of nitric acid. SUMMARY

[0004] The technical solution of the utility model provides a solution significantly different from the prior art to solve the technical problem of the prior art solution that easily leads to a decrease in the concentration of nitric acid. In order to overcome the above-mentioned defects of the prior art, the utility model provides a storage tank for nitric acid production, which aims to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides a storage tank for nitric acid production, which comprises: a tank body, a breather valve provided at the top of the tank body, a floating plate provided inside the tank body, an air bag provided on the outer surface of the floating plate, a hose connected to the top wall of the tank body, the end of the hose connected to the air bag, a gas filling mechanism provided at the top of the tank body and communicating with the hose, a liquid outlet pipe installed on the outer surface of the tank body near its bottom, a liquid inlet pipe provided on the outer surface of the tank body near its top, and a flow dividing mechanism provided at the end of the liquid inlet pipe and the inner wall of the tank body.

[0006] By providing the floating plate, the contact between nitric acid and air above can be blocked. Since there is a gap between the floating plate and the inner wall of the tank body, the air bag can be inflated by the gas filling mechanism and expanded to seal the gap, ensuring that air cannot come into contact with nitric acid, solving the problem of a decrease in the concentration of nitric acid. By providing the flow dividing mechanism, when nitric acid is added to the tank body, it can avoid direct impact on the floating plate above, preventing damage to the floating plate.

[0007] Preferably, the gas filling mechanism comprises a U-shaped bracket installed on the top of the tank body, a cylinder provided inside the U-shaped bracket, an air outlet pipe connected to the bottom of the cylinder, the end of the air outlet pipe connected to the top of the tank body, a piston rod provided inside the cylinder, an electric push rod installed on the top of the U-shaped bracket, the end of the extension end of the electric push rod connected to the piston rod, an air inlet pipe connected to the outer surface of the cylinder, and a one-way valve provided inside the air inlet pipe and the air outlet pipe.

[0008] The one-way valve on the air inlet pipe allows air to enter the cylinder only from the outside, and the one-way valve on the air outlet pipe allows air to enter the hose only from the cylinder, the electric push rod is started to drive the piston rod to move up and down inside the cylinder, when the piston rod rises, external air enters the cylinder from the air inlet pipe, when the piston rod descends, the air inside the cylinder is pushed into the hose from the air outlet pipe, thereby realizing the inflation of the air bag and the purpose of sealing the gap.

[0009] Preferably, the flow distribution mechanism comprises an annular pipe arranged on the outer surface of the tank body, and the end of the liquid inlet pipe is connected with the annular pipe, the inner side of the annular pipe is uniformly provided with a plurality of flow distribution pipes, the end of each flow distribution pipe is connected with the surface of the tank body, and the inner wall of the tank body is provided with a flow guide plate corresponding to each flow distribution pipe.

[0010] When filling nitric acid, the nitric acid enters the annular pipe from the liquid inlet pipe, and after being distributed by the plurality of flow distribution pipes, the nitric acid can impact on the flow guide plate at a small flow rate, the flow guide plate guides the nitric acid to flow along the inner wall of the tank body and flow into the lower part of the float plate through the gap between the float plate and the tank body, thereby avoiding the direct impact of the nitric acid on the upper part of the float plate, and the damage of the float plate can be avoided.

[0011] Preferably, an exhaust pipe is arranged on the outer surface of the air outlet pipe, and an electromagnetic valve is arranged in the exhaust pipe.

[0012] When the liquid level of the nitric acid in the tank body changes, the electromagnetic valve can be opened, so that the air in the air bag can be discharged outward from the exhaust pipe, thereby playing a pressure relief role, and at this time, the gap between the float plate and the inner wall of the tank body is restored, so that the float plate can float up and down with the change of the liquid level of the nitric acid.

[0013] Preferably, a climbing frame is arranged on the outer surface of the tank body, and a fence is arranged on the top of the tank body.

[0014] Through the arrangement of the climbing frame, the staff can easily climb to the top of the tank body for maintenance and inspection, and through the arrangement of the fence, the purpose of preventing falling can be achieved.

[0015] Preferably, a flip type liquid level meter is arranged on the outer surface of the tank body.

[0016] The staff can know the liquid level of the nitric acid in the tank body, so as to supplement in time.

[0017] Preferably, support plates are arranged at the four corners of the bottom of the tank body, and mounting holes are arranged in the bottom of each support plate.

[0018] The support plates can be fixed to the ground by bolts, thereby ensuring the structural stability of the tank body.

[0019] Preferably, the material of the hose is perfluoroether rubber, the material of the floating plate is polytetrafluoroethylene, and the floating plate is a hollow structure, and the material of the air bag is fluororubber.

[0020] The perfluoroether rubber not only has chemical corrosion resistance, but also has good elasticity and flexibility, and can maintain good performance after repeated bending, and is not easy to crack or damage, and can meet the use requirements, and the polytetrafluoroethylene also has chemical corrosion resistance, and since its density is greater than that of nitric acid, the floating plate can float on the nitric acid through the design of the hollow structure, and the fluororubber has excellent chemical stability and corrosion resistance, and is resistant to different concentrations of nitric acid.

[0021] The beneficial effects of the utility model are:

[0022] In use, the setting of the floating plate can block the contact of nitric acid with air above, and since there is a gap between the floating plate and the inner wall of the tank body, the gap can be sealed by the air bag through the inflation of the inflation mechanism, so that the air cannot contact the nitric acid, and the problem of reduced concentration of nitric acid is solved.

[0023] In use, the setting of the shunt mechanism can prevent the nitric acid from directly impacting the upper side of the floating plate when the nitric acid is added to the tank body, so as to prevent damage to the floating plate. DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0025] Figure 1 It is one of the three-dimensional structure schematic views of the utility model;

[0026] Figure 2 It is the second three-dimensional structure schematic view of the utility model;

[0027] Figure 3 It is a partial cross-sectional structure schematic view of the tank body in the utility model;

[0028] Figure 4 It is a cross-sectional structure schematic view of the floating plate in the utility model;

[0029] Figure 5 It is a partial cross-sectional structure schematic view of the cylinder in the utility model.

[0030] Part name

[0031] 100, tank body; 101, breathing valve; 102, float plate; 103, air bag; 104, liquid outlet pipe; 105, liquid inlet pipe; 106, hose; 200, inflation mechanism; 201, U-shaped frame; 202, cylinder body; 203, piston rod; 204, air outlet pipe; 205, electric push rod; 206, air inlet pipe; 207, one-way valve; 300, flow distribution mechanism; 301, annular pipe; 302, flow distribution pipe; 303, flow guide plate; 400, exhaust pipe; 401, electromagnetic valve; 500, climbing frame; 501, fence; 600, flap type liquid level gauge; 700, support plate; 701, mounting hole. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, preferably the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0033] In the description of the present application, it should be understood that the terms "length", "width", "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 the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, in the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0034] Please refer to Figures 1 to 5The utility model provides a kind of storage tank for nitric acid production, comprising: tank body 100, the top of tank body 100 is provided with breathing valve 101, the inside of tank body 100 is provided with float plate 102, the outer surface of float plate 102 is provided with air bag 103, the top wall of tank body 100 is connected with hose 106, the end of hose 106 is connected with air bag 103, the top of tank body 100 is provided with aeration mechanism 200 communicated with hose 106, the outer surface of tank body 100 is installed with liquid outlet pipe 104 close to its bottom, the outer surface of tank body 100 is provided with liquid inlet pipe 105 close to its top, the end of liquid inlet pipe 105 and the inner wall of tank body 100 are commonly provided with shunt mechanism 300, aeration mechanism 200 includes the U-shaped frame 201 installed in the top of tank body 100, the inside of U-shaped frame 201 is provided with cylinder 202, the bottom of cylinder 202 is connected with air outlet pipe 204, the end of air outlet pipe 204 is connected with the top of tank body 100, the inside of cylinder 202 is provided with piston rod 203, the top of U-shaped frame 201 is installed with electric push rod 205, the end of telescopic end of electric push rod 205 is connected with piston rod 203, the outer surface of cylinder 202 is connected with air inlet pipe 206, one-way valve 207 is provided in the inside of air inlet pipe 206 and air outlet pipe 204, shunt mechanism 300 includes annular pipe 301 being provided on the outer surface of tank body 100, and the end of liquid inlet pipe 105 is connected with annular pipe 301, a plurality of shunt pipes 302 are evenly installed on the inner side of annular pipe 301, the end of shunt pipe 302 is connected with the surface of tank body 100, the inner wall of tank body 100 is installed with flow guide plate 303 corresponding to shunt pipe 302, air outlet pipe 204 is installed with exhaust pipe 400 on the outer surface, electromagnetic valve 401 is provided in the inside of exhaust pipe 400, tank body 100 is installed with climbing frame 500 on the outer surface, tank body 100 is installed with rail 501 on the top, tank body 100 is provided with flap type liquid level meter 600 on the outer surface, support plate 700 is installed at the four corners of tank body 100 bottom, mounting hole 701 is formed in the bottom of support plate 700, the material of hose 106 is perfluoroether rubber, the material of float plate 102 is polytetrafluoroethylene, and float plate 102 is hollow structure, the material of air bag 103 is fluorine rubber;

[0035] In the present embodiment:

[0036] First, by adjusting the pressure inside the tank 100 through the breather valve 101, when the liquid level is lowered, the outside air can enter the tank 100 to balance the pressure, and the float plate 102 floats on the nitric acid to prevent the nitric acid from contacting the air. However, a gap is required between the float plate 102 and the inner wall of the tank 100 to ensure that the float plate 102 can rise and fall with the change in the liquid level. Therefore, whenever the liquid level of the nitric acid changes, the electric push rod 205 needs to be started to drive the piston rod 203 to move up and down inside the cylinder 202. When the piston rod 203 rises, the outside air enters the cylinder 202 from the air inlet pipe 206, and when the piston rod 203 descends, the air inside the cylinder 202 is pushed from the air outlet pipe 204 to the hose 106, thereby achieving the purpose of inflating the air bag 103 to seal the gap. When it is necessary to change the liquid level of the nitric acid, the electromagnetic valve 401 can be opened to allow the air inside the air bag 103 to be discharged from the exhaust pipe 400, thereby achieving the purpose of pressure relief. At this time, the gap between the float plate 102 and the inner wall of the tank 100 is restored, so that the float plate 102 can float up and down with the change in the liquid level of the nitric acid.

[0037] Next, when it is necessary to supplement the nitric acid inside the tank 100 through the liquid inlet pipe 105, the nitric acid enters the annular pipe 301 from the liquid inlet pipe 105, and after being divided by the multiple shunt pipes 302, it can impact on the deflector plate 303 with a small flow rate. The deflector plate 303 guides the nitric acid to flow along the inner wall of the tank 100 and into the lower part of the float plate 102 through the gap between the float plate 102 and the tank 100, thereby avoiding the direct impact of the nitric acid on the upper part of the float plate 102, which can cause damage to the float plate 102.

[0038] Finally, when it is necessary to maintain and inspect the breather valve 101 or the inflation mechanism 200, the worker can climb to the top of the tank 100 through the climbing frame 500, and the fence 501 can prevent falling.

[0039] The above disclosure is only a preferred embodiment of the present application, and of course cannot limit the scope of the present application. Those skilled in the art can understand that the above-mentioned embodiments can be implemented in whole or in part, and equivalent changes made in accordance with the claims of the present application still fall within the scope of the present application.

Claims

1. A storage tank for nitric acid production, comprising: The utility model provides a kind of gas tank, the top of the tank body (100) is provided with breathing valve (101), it is characterized by, the inside of the tank body (100) is provided with float plate (102), the outer surface of the float plate (102) is provided with air bag (103), the top wall of the tank body (100) is connected with hose (106), the end of the hose (106) is connected with the air bag (103), the top of the tank body (100) is provided with aeration mechanism (200) with the hose (106) communication, the outer surface of the tank body (100) is installed with liquid outlet pipe (104) near its bottom, the outer surface of the tank body (100) is provided with liquid inlet pipe (105) near its top, the end of the liquid inlet pipe (105) and the inner wall of the tank body (100) are provided with shunt mechanism (300) jointly.

2. The storage tank for nitric acid production according to claim 1, wherein The aeration mechanism (200) includes a U-shaped frame (201) mounted on the top of the tank body (100), the inner side of the U-shaped frame (201) is provided with a cylinder (202), the bottom of the cylinder (202) is connected with an air outlet pipe (204), the end of the air outlet pipe (204) is connected with the top of the tank body (100), the inside of the cylinder (202) is provided with a piston rod (203), the top of the U-shaped frame (201) is mounted with an electric push rod (205), the end of the telescopic end of the electric push rod (205) is connected with the piston rod (203), the outer surface of the cylinder (202) is connected with an air inlet pipe (206), the inside of the air inlet pipe (206) and the air outlet pipe (204) is provided with a one-way valve (207).

3. The storage tank for nitric acid production according to claim 1, wherein The shunt mechanism (300) includes an annular pipe (301) provided on the outer surface of the tank body (100), and the end of the liquid inlet pipe (105) is connected with the annular pipe (301), a plurality of shunt pipes (302) are uniformly mounted on the inner side of the annular pipe (301), the end of the shunt pipe (302) is connected with the surface of the tank body (100), and the inner wall of the tank body (100) is mounted with a flow guide plate (303) corresponding to the shunt pipe (302).

4. The storage tank for nitric acid production according to claim 2, wherein The outer surface of the air outlet pipe (204) is mounted with an exhaust pipe (400), and the inside of the exhaust pipe (400) is provided with a solenoid valve (401).

5. The storage tank for nitric acid production according to claim 1, wherein The outer surface of the tank body (100) is mounted with a climbing frame (500), and the top of the tank body (100) is mounted with a fence (501).

6. The storage tank for nitric acid production according to claim 1, wherein The outer surface of the tank body (100) is provided with a flip plate type liquid level meter (600).

7. The storage tank for nitric acid production according to claim 1, wherein The bottom of the tank body (100) is mounted with a support plate (700) at four corners, and the bottom of the support plate (700) is provided with a mounting hole (701).

8. The storage tank for nitric acid production according to claim 1, wherein The material of the hose (106) is perfluoroether rubber, the material of the float plate (102) is polytetrafluoroethylene, and the float plate (102) is a hollow structure, and the material of the air bag (103) is fluorine rubber.

Images