Novel magnesium nitrate heater device

Abstract

The utility model relates to a novel magnesium nitrate heater device which comprises a heater cylinder body and a blanking pipe connected with the heater cylinder body, and the middle part of the blanking pipe is communicated with a material inlet; a coil pipe is arranged in the heater cylinder body, and a feed port, a discharge port, a steam inlet and a condensed water outlet are formed in the heater cylinder body; the steam inlet and the condensate water outlet are communicated with the two ends of the coil pipe respectively, the steam inlet is formed in the top of the heater barrel, and the condensate water outlet is formed in the bottom of the heater barrel; the two feeding ports are symmetrically formed in the middle of the front side wall and the middle of the rear side wall of the barrel correspondingly, and the two feeding ports communicate with the two ends of the discharging pipe correspondingly. And meanwhile, the feeding hole is connected with the heater barrel through the flange, so that the heater is convenient to maintain or replace even if being damaged.

Description

Technical Field

[0001] This utility model belongs to the field of concentrated nitric acid production technology, and in particular relates to a novel magnesium nitrate heater device. Background Technology

[0002] Currently, most concentrated nitric acid production in China first produces dilute nitric acid, which is then concentrated. Magnesium nitrate is used as a dehydrating agent during this concentration process and is recycled. After the magnesium nitrate solution is mixed with dilute nitric acid and concentrated and dehydrated in a concentration tower, it needs to undergo denitrification treatment in a magnesium nitrate heater to prevent excessively high nitric acid content in the magnesium nitrate solution from corroding the equipment. However, the magnesium nitrate solution falls at a relatively high velocity in the concentration tower, causing it to continuously scour the coils in the magnesium nitrate heater, leading to leaks. This results in poor denitrification efficiency and excessively high nitric acid content in the magnesium nitrate solution, which corrodes the magnesium nitrate heater. Utility Model Content

[0003] The purpose of this invention is to provide a novel magnesium nitrate heater device to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A novel magnesium nitrate heater device includes: a heater cylinder and a feed pipe connected to the heater cylinder, wherein the feed pipe has a feed inlet in the middle; the heater cylinder is provided with a coil inside, and the heater cylinder is provided with a feed inlet, a discharge outlet, a steam inlet and a condensate outlet;

[0006] The steam inlet and the condensate outlet are connected to the two ends of the coil, respectively. The steam inlet is located at the top of the heater cylinder, and the condensate outlet is located at the bottom of the heater cylinder. Two feed inlets are provided, respectively symmetrically located in the middle of the front and rear side walls of the cylinder. The two feed inlets are connected to the two ends of the feed pipe, respectively. The discharge outlet is located at the end of the cylinder.

[0007] As a further improvement of this utility model, a manhole is provided at the top of the heater cylinder.

[0008] As a further improvement of this utility model, the top of the heater cylinder is provided with a steam outlet and the bottom is provided with a drain outlet.

[0009] As a further improvement of this utility model, sight glasses are provided on both the front and rear side walls of the heater cylinder.

[0010] As a further improvement of this utility model, the top of the heater cylinder is provided with a heating port, and the side wall is provided with a thermometer port.

[0011] As a further improvement of this utility model, the heater cylinder is also provided with several horizontally arranged baffles. The bottom of the baffles is connected to the inner bottom of the heater cylinder, and a through hole is provided in the middle for the coil to pass through.

[0012] As a further improvement of this utility model, a support is provided at the bottom of the heater cylinder.

[0013] The beneficial effects of adopting the above technical solution are as follows:

[0014] This invention features two feed inlets located in the middle of the front and rear side walls of the heater cylinder. On one hand, this diverts the solution falling from the concentration tower, reducing the scouring force on the heater cylinder's interior. On the other hand, the solution enters the heater cylinder from the side, reducing or even eliminating the instantaneous contact between the solution and the coil upon entry, thus minimizing direct scouring of the coil. This achieves the goals of reducing the leakage frequency of the magnesium nitrate heater, improving its denitrification effect, and reducing the likelihood of equipment corrosion. Attached Figure Description

[0015] Figure 1 This is a front view of the heater cylinder of this utility model;

[0016] Figure 2 This is a right view of the heater cylinder of this utility model;

[0017] Figure 3 This is a schematic diagram of the feeding tube of this utility model;

[0018] The markings in the diagram are as follows: 1. Heater cylinder, 2. Coil, 3. Inlet, 4. Outlet, 5. Steam inlet, 6. Condensate outlet, 7. Manhole, 8. Steam outlet, 9. Drain outlet, 10. Sight glass, 11. Heating port, 12. Thermometer port, 13. Baffle plate, 14. Support, 15. Feed pipe, 16. Inlet, 17. Main pipe. Detailed Implementation

[0019] To better understand the purpose, structure, and function of this utility model, a clear and complete description of this utility model will be provided below in conjunction with the accompanying drawings.

[0020] like Figures 1-3A novel magnesium nitrate heater device is shown, comprising: a heater cylinder 1 and a feed pipe 15 connected to the heater cylinder 1, with a feed inlet 16 connected to the middle of the feed pipe 15; a coil 2 is provided inside the heater cylinder 1, and the heater cylinder 1 is provided with a feed inlet 3, a discharge outlet 4, a steam inlet 5, and a condensate outlet 6; wherein the steam inlet 5 and the condensate outlet 6 are connected to the two ends of the coil 2 respectively. In this embodiment, the steam inlet 5 is located at the top of the heater cylinder 1, the condensate outlet 6 is located at the bottom of the heater cylinder 1, and the discharge outlet 4 is located at the end of the cylinder. In use, hot steam enters the coil 2 from the steam inlet 5, and the solution in the concentration tower enters the interior of the heater cylinder 1 from the feed inlet 3, exchanging heat with the steam in the coil 2. The heated steam becomes condensate and is discharged from the condensate outlet 6, while the heated solution is discharged from the discharge outlet 4. A support 14 is provided at the bottom of the heater cylinder 1 to support the heater cylinder 1.

[0021] In this embodiment, the feed pipe 15 is herringbone shaped, such as... Figure 3 As shown, the system includes an inlet 16 and symmetrically arranged "["-shaped main pipes 17 on both sides of the inlet 16. The upper end of the main pipe 17 is connected to the inlet 16, and the lower end, which is shorter than the upper end, is used to connect to the heater body. In actual manufacturing, a tee can be used at the inlet 16, a 90° elbow is used at the corner of the main pipe 17, and straight pipes are used for the rest of the assembly. To prevent the solution in the concentration tower from washing away from the coil 2 and causing leakage and corrosion of the heater, two inlets 3 are provided, symmetrically arranged in the middle of the front and rear side walls of the body. The two inlets 3 are connected to both ends of the discharge pipe 15, i.e., connected to the lower end of the main pipe 17. The outlet 4 is located at the end of the body.

[0022] The solution in the concentration tower enters the heater body 1 through the feed pipe 15. On one hand, two feed inlets 3 are provided, connecting to both ends of the herringbone-shaped feed pipe 15 to divert the solution falling from the concentration tower, thereby reducing the scouring force on the inside of the heater body 1. On the other hand, the two feed inlets 3 are symmetrically arranged in the middle of the front and rear side walls of the body, changing the way the solution enters the heater body 1 from the top of the heater, instead allowing it to enter from the side. This reduces or even eliminates the instantaneous contact between the solution and the coil 2 upon entry, thus reducing direct scouring of the coil 2. Of course, to facilitate maintenance and replacement of the herringbone-shaped feed pipe 15, a flange is provided at the end of the feed pipe 15 to connect to the feed inlets 3 and the outlet of the concentration tower.

[0023] Furthermore, the heater cylinder 1 is also provided with several horizontally arranged baffles 13 inside. The bottom of the baffles 13 is connected to the inner bottom of the heater cylinder 1, and a through hole is provided in the middle for the coil 2 to pass through. The baffles 13 support the coil 2 on the one hand, and force the solution to change the flow direction on the other hand, thereby prolonging the flow path, increasing the heat exchange time, increasing turbulence, and improving the heat transfer efficiency.

[0024] Furthermore, the heater cylinder 1 is provided with a heating port 11 at the top and a thermometer port 12 on the side wall; the heating port 11 serves as an auxiliary heating interface, used to rapidly heat up when the heater is started, or to supplement heat when the steam heat is insufficient; the thermometer port 12 is used to detect the temperature of the solution inside the heater cylinder 1.

[0025] Furthermore, the heater cylinder 1 is provided with a steam outlet 8 at the top and a drain outlet 9 at the bottom. The steam outlet 8 is used to remove the gas accumulated inside the heater during startup or operation to prevent gas resistance from affecting the heat transfer efficiency; the drain outlet 9 is used to drain residual liquid during maintenance and to quickly depressurize and drain liquid in emergencies.

[0026] Furthermore, sight glasses 10 are provided on both the front and rear side walls of the heater cylinder 1 for observing the internal condition of the heater cylinder 1. A manhole 7 is provided on the top of the heater cylinder 1 for internal inspection and maintenance to ensure safe operation of the equipment.

[0027] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A novel magnesium nitrate heater device, characterized in that: It includes: The heater cylinder (1) and the feed pipe (15) connected to the heater cylinder (1) are provided with a feed inlet (16) in the middle of the feed pipe (15); the heater cylinder (1) is provided with a coil (2) inside, and the heater cylinder (1) is provided with a feed inlet (3), a discharge outlet (4), a steam inlet (5) and a condensate outlet (6); The steam inlet (5) and the condensate outlet (6) are connected to the two ends of the coil (2), respectively. The steam inlet (5) is located at the top of the heater cylinder (1), and the condensate outlet (6) is located at the bottom of the heater cylinder (1). Two feed inlets (3) are provided, respectively symmetrically located in the middle of the front and rear side walls of the cylinder. The two feed inlets (3) are connected to the two ends of the feed pipe (15), respectively. The discharge port (4) is located at the end of the cylinder.

2. The novel magnesium nitrate heater device according to claim 1, characterized in that: The heater cylinder (1) is provided with a manhole (7) at the top.

3. The novel magnesium nitrate heater device according to claim 1, characterized in that: The heater cylinder (1) has a steam outlet (8) at the top and a drain outlet (9) at the bottom.

4. The novel magnesium nitrate heater device according to claim 1, characterized in that: Sight glasses (10) are provided on both the front and rear side walls of the heater cylinder (1).

5. The novel magnesium nitrate heater device according to claim 1, characterized in that: The heater cylinder (1) has a heating port (11) at the top and a thermometer port (12) on the side wall.

6. The novel magnesium nitrate heater device according to claim 1, characterized in that: The heater cylinder (1) is also provided with several horizontally arranged baffles (13). The bottom of the baffles (13) is connected to the inner bottom of the heater cylinder (1), and a through hole is provided in the middle for the coil (2) to pass through.

7. The novel magnesium nitrate heater device according to claim 1, characterized in that: The bottom of the heater cylinder (1) is provided with a support (14).

Images