A storage tank for facilitating the discharge of materials which are prone to freezing

Abstract

The utility model relates to a kind of storage tanks convenient for discharging easily frozen material, belong to the field of storage tank, including tank body, steam coil is arranged in the tank body, the side pipe blow-off pipe of tank body is connected, purge coil is arranged in the tank body, the purge coil is annular, the side of purge coil is connected with input pipe, the input pipe extends to the outside of tank body, the input pipe is connected nitrogen source, the bottom of purge coil is provided with multiple purge pipes, multiple purge pipes are distributed along purge coil length direction, the purge pipe is inclined to the direction of approaching blow-off pipe downward.This utility model nitrogen is blown to the bottom material in tank body, can speed up material flow speed, slow down material condensation speed, at the same time, play stirring action, make up and down cold and hot material mix;Nitrogen blows all remaining material to blow-off pipe, can prevent material from gathering around tank body, reduce material residue around tank body, speed up material gathering at blow-off pipe, accelerate emptying speed.

Description

Technical Field

[0001] This utility model relates to a storage tank that facilitates the discharge of easily frozen materials, and belongs to the field of storage tanks. Background Technology

[0002] Liquid chemical storage units set up storage tanks to store various hazardous chemicals. Due to the different physicochemical properties of various materials, when storing materials that are prone to freezing at room temperature, such as phenol, palm oil, paraxylene, and glacial acetic acid, it is necessary to heat the storage tanks to ensure that the materials inside the tanks are in a liquid state for easy pipeline transportation.

[0003] During routine heating, companies often install steam purging coils inside the tanks. High-temperature steam is supplied through these coils to heat the materials inside the tank using the principle of heat exchange. However, due to the following reasons, when the tank is emptied or drained, residual material may crystallize and freeze at the bottom, especially around the bottom, making emptying difficult: 1. Most storage tanks are designed with steam purging coils about 30 cm from the bottom of the tank. Since hot materials have a lower density and cold materials have a higher density, hot materials will accumulate at the top of the tank and cold materials will accumulate at the bottom of the tank, resulting in the material temperature at the bottom of the tank being lower. 2. When the liquid level in the storage tank is below 30 cm, the material separates from the steam purging coil. The steam purging coil and the material cannot exchange heat normally, resulting in the material temperature at the bottom of the tank being too low in the later stage of the transfer process, and the material crystallizing at the bottom of the storage tank. 3. When the steam heating effect fails, the material comes into direct contact with the cold bottom of the tank, causing the temperature of the remaining material to drop sharply, which will accelerate the crystallization of the material.

[0004] Because the bottom plate of the storage tank is convex (e.g.) Figure 3 As shown in the image, frozen material accumulates around the bottom plate of the storage tank and cannot flow out normally through the drain pipe. Common solutions include the following: 1. When the material is frozen at the bottom of the storage tank and cannot be poured out, pour the same type of material at a higher temperature from another storage tank into the first storage tank to melt the frozen material at the bottom before pouring it out. The disadvantage of this method is that when the high-temperature material is poured in, it is impossible to completely dissolve all the frozen material. Therefore, the high-temperature material needs to be poured in and out repeatedly, which not only consumes a lot of manpower and resources, but also leaves some residual material at the bottom of the storage tank. 2. Open the manhole of the storage tank, lay the metal hose around the bottom of the tank, and pass steam into the metal hose to melt the frozen material at the bottom and pour it out. The disadvantage of this method is that the manhole needs to be opened and the metal hose laid at the bottom of the storage tank. During this process, a large amount of flammable and toxic gas will be released, which not only pollutes the air but also affects human health. Third, directly introduce steam into the bottom of the tank to melt the frozen material; the disadvantage of this method is that the steam condensate dissolves in the material, which not only contaminates the material and reduces its quality, but also results in a large loss of material.

[0005] All three methods can be used to pour out the condensed material, but each has its drawbacks.

[0006] Therefore, there is a need for a storage tank that facilitates the discharge of easily frozen materials, thus enabling the discharge of easily frozen materials from the storage tank. Utility Model Content

[0007] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, to provide a storage tank that facilitates the discharge of easily frozen materials from the storage tank.

[0008] The technical solution adopted by this utility model to solve the above problems is as follows: a storage tank for easy discharge of easily frozen materials, including a tank body, a steam coil installed inside the tank body, a drain pipe connected to one side of the tank body, a purge coil installed inside the tank body, the purge coil being annular, an input pipe connected to one side of the purge coil, the input pipe extending to the outside of the tank body, the input pipe being connected to a nitrogen source, and multiple purge pipes installed at the bottom of the purge coil, the multiple purge pipes being distributed along the length direction of the purge coil, the purge pipes being inclined downwards towards the drain pipe.

[0009] Preferably, the purging coil is made of DN50 stainless steel.

[0010] Preferably, the purge pipe is made of DN15 stainless steel.

[0011] Preferably, the drain pipe is located on the side of the purge coil away from the inlet pipe.

[0012] Preferably, the inclination angle of each purge pipe gradually increases from the direction of the inlet pipe toward the outlet pipe.

[0013] Preferably, a valve is installed on the sewage pipe.

[0014] Preferably, a check valve is provided on the input pipe.

[0015] Preferably, the purging coil includes two coil sections arranged symmetrically, with the input ends of both coil sections connected to the input pipe and the output ends of both coil sections sealed.

[0016] Preferably, the output ends of both coil sections are connected to flanges, and the two flanges are sealed by a baffle plate.

[0017] Preferably, the steam coil and the purging coil are distributed from the inside out.

[0018] Compared with the prior art, the advantages of this utility model are: 1. Nitrogen gas is blown into the material at the bottom of the tank, which can accelerate the flow rate of the material, slow down the condensation rate of the material, and at the same time, it plays a stirring role, so that the hot and cold materials at the top and bottom are mixed. Second, nitrogen gas blows all the remaining material toward the drain pipe, which can prevent the material from accumulating around the tank and reduce the amount of material residue around the tank, thus reducing crystallization. 3. Accelerate the accumulation of materials at the sewage pipe and speed up the emptying process; Fourth, the principle of this device is simple and easy to understand, and it is easy to install; Fifth, when emptying the can, all remaining materials can be blown out at once without opening the manhole, which not only saves manpower and resources, but also prevents the leakage of any flammable or toxic gases, protecting the health of employees and the environment. VI. It can be used as a storage tank for materials that are prone to freezing in winter, such as phenol, glacial acetic acid, p-xylene, 1,4-butanediol, and palm oil. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a storage tank for facilitating the discharge of easily frozen materials according to this utility model; Figure 2 This is a top view of a storage tank according to the present invention, which facilitates the discharge of easily frozen materials; Figure 3 This is a drawing of the tank bottom plate.

[0020] in: Tank body 1, purge coil 2, inlet pipe 3, drain pipe 4, valve 5, check valve 6, purge pipe 7, slide gate 8; Section 21 of the coil. Detailed Implementation

[0021] like Figure 1-2 As shown, this embodiment of a storage tank for facilitating the discharge of easily frozen materials includes a tank body 1. A purge coil 2 is installed inside the tank body 1. The purge coil 2 is annular and made of DN50 stainless steel, where DN50 indicates an outer diameter of 60mm, an inner diameter of 50mm, and a wall thickness of 3mm. An input pipe 3 is connected to one side of the purge coil 2 and extends to the outside of the tank body 1. The input pipe 3 is connected to a nitrogen source. A drain pipe 4 is connected to one side of the tank body 1 and is located on the side of the purge coil 2 away from the input pipe 3. A valve 5 is installed on the drain pipe 4, and a check valve 6 is installed on the input pipe 3. The bottom of the purge coil 2 is provided with multiple purge pipes 7. The purge pipes 7 are made of DN15 stainless steel. DN15 means that the outer diameter is 21.3mm, the inner diameter is 15mm, and the wall thickness is 0.8mm. The multiple purge pipes 7 are distributed along the length of the purge coil 2. The purge pipes 7 are inclined downwards towards the drain pipe 4. The inclination angle of each purge pipe 7 gradually increases from the input pipe 3 towards the drain pipe 4. After nitrogen is supplied from the nitrogen source through the input pipe 3 to the purge coil 2, the nitrogen in the purge coil 2 is discharged through the purge pipe 7. The nitrogen acts on the remaining material at the bottom of the tank 1. In fact, the tank 1 is also equipped with a steam coil, which is located in the annular structure of the purge coil 2. That is, the steam coil and the purge coil 2 are distributed from the inside to the outside. The material is heated by the steam coil until the material in the tank 1 is emptied through the drain pipe 4. The inclined purge pipe 7 facilitates the accumulation of material at the drain pipe 4 and accelerates the emptying speed. The purging coil 2 includes two coil sections 21, which are arranged symmetrically. The input ends of the two coil sections are connected to the input pipe 3, and the output ends of the two coil sections 21 are sealed. Both coil sections 21 have flanges connected to their output ends, and the two flanges are sealed together by a baffle plate 8. Here, the storage tank that facilitates the discharge of easily frozen materials has the following advantages; 1. Nitrogen gas is blown into the bottom of the tank 1 to accelerate the flow of materials, slow down the condensation of materials, and at the same time, it plays a stirring role to mix the hot and cold materials from the top and bottom. Second, nitrogen gas blows all the remaining material toward the drain pipe 4, which can prevent the material from accumulating around the tank 1 and reduce the material residue around the tank 1, that is, reduce crystallization. 3. Accelerate the accumulation of materials at 4 points in the sewage pipe and speed up the emptying process; Fourth, the principle of this device is simple and easy to understand, and it is easy to install; Fifth, when emptying the can, all remaining materials can be blown out at once without opening the manhole, which not only saves manpower and resources, but also prevents the leakage of any flammable or toxic gases, protecting the health of employees and the environment. VI. It can be used as a storage tank for materials that are prone to freezing in winter, such as phenol, glacial acetic acid, p-xylene, 1,4-butanediol, and palm oil.

[0022] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A storage tank for facilitating the discharge of easily frozen materials, comprising a tank body (1), wherein a steam coil is installed inside the tank body (1), and a drain pipe (4) is connected to one side of the tank body (1), characterized in that: The tank (1) is equipped with a purge coil (2), which is annular. One side of the purge coil (2) is connected to an input pipe (3), which extends to the outside of the tank (1). The input pipe (3) is connected to a nitrogen source. Multiple purge pipes (7) are provided at the bottom of the purge coil (2). The multiple purge pipes (7) are distributed along the length of the purge coil (2), and the purge pipes (7) are inclined downwards towards the drain pipe (4).

2. The storage tank for facilitating the discharge of easily frozen materials according to claim 1, characterized in that: The purging coil (2) is made of DN50 stainless steel.

3. The storage tank for facilitating the discharge of easily frozen materials according to claim 1, characterized in that: The purge pipe (7) is made of DN15 stainless steel.

4. A storage tank for facilitating the discharge of easily frozen materials according to claim 1, characterized in that: The drain pipe (4) is located on the side of the purge coil (2) away from the inlet pipe (3).

5. A storage tank for facilitating the discharge of easily frozen materials according to claim 4, characterized in that: The tilt angle of each purge pipe (7) gradually increases from the direction of the inlet pipe (3) towards the drain pipe (4).

6. A storage tank for facilitating the discharge of easily frozen materials according to claim 1, characterized in that: A valve (5) is installed on the sewage pipe (4).

7. A storage tank for facilitating the discharge of easily frozen materials according to claim 1, characterized in that: A check valve (6) is provided on the input pipe (3).

8. A storage tank for facilitating the discharge of easily frozen materials according to claim 1, characterized in that: The purging coil (2) includes two coil sections (21), which are arranged symmetrically. The input ends of the two coil sections are connected to the input pipe (3), and the output ends of the two coil sections (21) are sealed.

9. A storage tank for facilitating the discharge of easily frozen materials according to claim 1, characterized in that: The output ends of both coil sections (21) are connected to flanges, and the two flanges are sealed by a baffle plate (8).

10. A storage tank for facilitating the discharge of easily frozen materials according to claim 1, characterized in that: The steam coil and the purging coil (2) are distributed from the inside out.

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