Urea solution storage tank with heating coil

Abstract

The urea solution storage tank with the heating coil comprises a tank body, the heating coil is installed on the bottom face in the tank body, one end of the heating coil penetrates out of the back face of the tank body to be connected with a steam heating device, the other end of the heating coil penetrates through the front face of the tank body to be connected with the outside, and a hole is formed in the bottom of the side face of the tank body to be connected with a discharging pipe. A first discharging valve and a second discharging valve are arranged on the discharging pipe, a hole is formed in the conical side face of the top of the tank body and connected with a feeding pipe, a feeding valve is installed on the feeding pipe, a hole is formed in the bottom of the side face, opposite to the feeding pipe, of the tank body and connected with a pumping pipe, a pumping valve is installed on the pumping pipe, and the pumping pipe is connected with a recycling pump. And a pump outlet of the recirculating pump is connected with the pump-out pipe. The urea solution is heated through the steam heating device and the heating coil pipe, and the temperature of the solution in the tank is balanced through the recirculation pump, so that the temperature of the solution in the tank is kept between 30 DEG C and 40 DEG C, and the urea solution is convenient to store and use subsequently.

Description

Technical Field

[0001] The utility model relates to the technical field of urea solution storage tanks, and specifically relates to a storage tank for urea solution with a heating coil. Background Art

[0002] Urea solution refers to a solution obtained by dissolving urea in water. Urea is a colorless, odorless crystalline solid that is soluble in water and has a variety of uses, including in the fields of fertilizers, chemical raw materials, medicine, and cosmetics. In industrial production, urea solution is stored in a tank, and the temperature inside the tank is maintained to extend the storage time of the urea solution.

[0003] The crystallization temperature of urea solution is eight degrees Celsius. During the process of ammonia production, it is necessary to ensure that the temperature of the urea solution is between thirty degrees Celsius and forty degrees Celsius. Most of the existing urea solution storage tanks are unable to heat the urea solution, and thus cannot ensure the temperature of the urea solution during the ammonia production process. When the temperature is lower than eight degrees Celsius and urea crystallizes, the urea concentration in the urea solution becomes lower, resulting in a decrease in ammonia production efficiency and being unfavorable for the preservation of the urea solution. After the existing urea storage tanks heat the urea solution, it is easy to cause uneven heating of the urea solution, and it is impossible to ensure that the overall temperature of the urea solution is maintained between thirty degrees Celsius and forty degrees Celsius, affecting the ammonia production efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a storage tank for urea solution with a heating coil to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A storage tank for urea solution with a heating coil, including a tank body. The tank body is of a vertical flat-bottomed conical top structure. A heating coil is installed on the inner bottom surface of the tank body. One end of the heating coil passes through the back of the tank body and is connected to a steam heating device, and the other end passes through the front of the tank body and is connected to the outside. A breathing hole is installed at the top of the tank body. An outlet pipe is connected to an opening at the bottom of the side of the tank body, and a pipe tracing structure is wrapped on the surface of the outlet pipe. A first outlet valve and a second outlet valve are arranged on the outlet pipe. An inlet pipe is connected to an opening on the conical side at the top of the tank body, and an inlet valve is installed on the inlet pipe. A pumping pipe is connected to an opening at the bottom of the side of the tank body opposite to the inlet pipe, and a pumping valve is installed on the pumping pipe. The pumping pipe is connected to a recirculation pump, the pump outlet of the recirculation pump is connected to a pump-out pipe, and the other end of the pump-out pipe is connected to the inlet pipe. A pump-out valve is arranged on the pump-out pipe near the inlet pipe. A manhole door is installed near the bottom of the side of the tank body.

[0007] Preferably, the internal volume of the tank body is greater than 335 cubic meters. The tank body is made of 304L stainless steel. Reinforcing ribs are provided inside the tank body. A radar level gauge for detecting the liquid level height and a thermometer for monitoring the liquid temperature are installed on the top surface inside the tank body.

[0008] Preferably, the pipeline tracing structure includes a housing. Heat-insulating cotton is filled between the housing and the feed pipe, and a tracing cable for heat supply is inserted into the heat-insulating cotton.

[0009] Preferably, the interface of the pump-out pipe and the feed pipe is located outside the feed valve.

[0010] Preferably, the heating coil is arranged in a zigzag shape on the bottom surface of the entire tank body, and the heating coil is made of 316L stainless steel.

[0011] Preferably, a display screen for displaying the liquid level and temperature, a handle, and an opening valve for opening the door are provided on the manhole door. A sealing ring is provided between the manhole door and the tank body. The material of the manhole door is 304L stainless steel.

[0012] Preferably, the top of the tank body 1 is covered with a sunshade. The tank body is placed on a base, and the material of the base is concrete.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the present utility model, the urea solution can be heated by the heating coil at the bottom and the steam heating device. Compared with the direct heating method, it is softer, can better maintain the temperature of the urea solution, make the temperature of the urea solution meet the ammonia production standard, prevent the crystallization of the urea solution, and improve the ammonia production efficiency.

[0015] In the present utility model, by setting a recirculation pump, the temperature of the urea solution in the storage tank is ensured to reach equilibrium, and the internal temperature difference of the urea solution is avoided.

[0016] In the present utility model, a double-valve setting is adopted at the discharge port, ensuring the safety of the tank body during the calibration or maintenance of the safety valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front structural schematic diagram of the present utility model;

[0018] Figure 2 is a side structural schematic diagram of the present utility model;

[0019] Figure 3 is a top internal plan view of the present utility model with the top removed;

[0020] Figure 4 is an enlarged view at position a of the present utility model;

[0021] Figure 5 Schematic diagram of the pipeline tracing structure of the present utility model;

[0022] In the figure: 1. Tank body; 2. Sunshade; 3. Manhole door; 4. Breather hole; 5. Reinforcing rib; 6. Temperature detector; 7. Radar level gauge; 8. Tracing cable; 9. Feed pipe; 10. Feed valve; 11. Feed inlet; 12. Pump-out valve; 13. Pump-out pipe; 14. Recirculation pump; 15. Pump-in pipe; 16. Pump-in valve; 17. Base; 18. Heating coil; 19. Discharge pipe; 20. First discharge valve; 21. Second discharge valve; 22. Pipeline tracing structure; 23. Discharge outlet; 24. Thermal insulation cotton; 25. Display screen; 26. Handle; 27. Door opening valve; 28. Sealing ring; 29. Steam heating device; 30. Shell. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment:

[0025] Please refer to Figures 1 to 5 , the present utility model provides a technical solution:

[0026] A urea solution storage tank with a heating coil, including a tank body 1, the tank body 1 is of a vertical flat-bottomed conical top structure, a heating coil 18 is installed on the inner bottom surface of the tank body 1, one end of the heating coil 18 passes through the back of the tank body 1 and is connected to a steam heating device 29, and the other end passes through the front of the tank body 1 and is connected to the outside. A breather hole 4 is installed on the top of the tank body 1. An outlet pipe 23 is connected to an opening on the bottom side of the tank body 1, and a pipeline tracing structure 22 is wrapped on the surface of the outlet pipe 23. A first discharge valve 20 and a second discharge valve 21 are arranged on the outlet pipe 23. An inlet pipe 9 is connected to an opening on the conical side of the top of the tank body 1, and a feed valve 10 is installed on the inlet pipe 9. A pump-in pipe 15 is connected to an opening on the bottom side of the tank body 1 opposite to the inlet pipe 9, and a pump-in valve 16 is installed on the pump-in pipe 15. The pump-in pipe 15 is connected to a recirculation pump 14, the pump outlet of the recirculation pump 14 is connected to a pump-out pipe 13, and the other end of the pump-out pipe 13 is connected to the inlet pipe 9. A pump-out valve 12 is arranged on the pump-out pipe 13 near the inlet pipe 9. A manhole door 3 is installed on the side of the tank body 1 near the bottom. The manhole door 3 facilitates the entry and exit of personnel and facilitates the maintenance and cleaning of the tank body 1.

[0027] Specifically, the internal volume of the tank body 1 is greater than 335 cubic meters. The tank body 1 is made of 304L stainless steel. Reinforcing ribs 5 are arranged inside the tank body 1 to ensure the structural strength of the tank body 1. A radar level gauge 7 for detecting the liquid level height and a temperature detector 6 for monitoring the liquid temperature are installed on the inner top surface of the tank body 1. The data detected by the radar level gauge 7 and the temperature detector 6 are presented on the display screen 25 through wires.

[0028] Specifically, the pipeline tracing structure 22 includes a housing 30. Heat-insulating cotton 24 is filled between the housing 30 and the feed pipe 9. A tracing cable 8 for heating is inserted into the heat-insulating cotton 24. The pipeline tracing structure 22 is used to keep the urea solution in the pipeline warm and prevent the temperature of the urea solution from dropping during the flow in the pipeline.

[0029] Specifically, the interface of the pump-out pipe 13 and the feed pipe 9 is located inside the feed valve 10 to prevent the pumped urea solution from flowing back along the feed pipe 9.

[0030] Specifically, the heating coil 18 is arranged in a "zigzag" shape on the bottom surface of the entire tank body 1, which can better heat the urea solution. The heating coil 18 is made of 316L stainless steel.

[0031] Specifically, a display screen 25 for displaying the liquid level and temperature, a handle 26, and an opening valve 27 for opening the door are arranged on the manhole door 3. A sealing ring 28 is arranged between the manhole door 3 and the tank body 1. Sealing devices are arranged at the interfaces of all pipes and the tank body 1 to prevent the urea solution from leaking. The manhole door 3 is made of 304L stainless steel. When there is no urea liquid in the tank body 1 that needs to be cleaned and repaired, the manhole door 3 can be opened by rotating the opening valve 27, and maintenance personnel can enter the inside of the tank body 1.

[0032] Specifically, the top of the tank body 1 is covered with a sunshade 2 to prevent the temperature of the tank body 1 from rising due to exposure to the sun. At the same time, it has a certain waterproof effect and can extend the service life of the tank body. The tank body 1 is placed on a base 17 made of concrete, and the material of any accessory of the tank body 1 is not lower than 304L.

[0033] When feeding, close the pump-out valve 12, the first discharge valve 20 and the second discharge valve 21, open the feed valve 10, and the urea solution flows into the interior of the tank from the feed port 11. Observe the liquid level of the urea solution in the tank 1 through the display screen 25. When the liquid level requirement is reached, close the feed valve 10; observe the temperature of the urea solution through the display screen 25. When the temperature is lower than 30 degrees Celsius, the steam heating device 29 operates, and the high-temperature steam passes through the heating coil 18, thereby heating the temperature of the urea solution. At the same time, the recirculation pump 14 operates, open the pump-in valve 16, close the feed valve 10, and pump the bottom urea solution to the top through the pump body, so as to perform internal circulation on the internal urea solution and keep the temperature of the urea solution balanced; when it is necessary to release the urea solution, open the first discharge valve 20 and the second discharge valve 21, and the urea solution will flow out from the discharge port 23 and be transferred along the discharge pipe 19. The setting of the first discharge valve 20 and the second discharge valve 21 ensures the safety of the tank 1 during the safety valve calibration or maintenance period.

[0034] For the rest of the present utility model that is not described, it can be the same as the prior art, or be well-known technology, or can be implemented by using the prior art, and will not be elaborated here.

[0035] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A urea solution storage tank with a heating coil, characterized in that: The invention comprises a tank body (1), wherein the tank body (1) is a vertical flat-bottomed conical-top structure, a heating coil (18) is installed on the bottom surface of the tank body (1), one end of the heating coil (18) passes through the back of the tank body (1) and is connected to a steam heating device (29), and the other end passes through the front of the tank body (1) and is connected to the outside, a breathing hole (4) is installed on the top of the tank body (1), a discharge pipe (23) is connected to the bottom opening of the side of the tank body (1), the surface of the discharge pipe (23) is wrapped with a pipeline heating structure (22), a first discharge valve (20) and a second discharge valve (21) are arranged on the discharge pipe (23), and the tank body (1) ) is connected to a feed pipe (9) through a conical opening on the top side, and a feed valve (10) is installed on the feed pipe (9); a pump inlet pipe (15) is connected to a bottom opening on the side opposite to the feed pipe (9) of the tank body (1), and a pump inlet valve (16) is installed on the pump inlet pipe (15); the pump inlet pipe (15) is connected to a recirculation pump (14); the pump outlet of the recirculation pump (14) is connected to a pump outlet pipe (13); the other end of the pump outlet pipe (13) is connected to the feed pipe (9); a pump outlet valve (12) is provided on the pump outlet pipe (13) near the feed pipe (9); and a manhole door (3) is installed on the side of the tank body (1) near the bottom.

2. The urea solution storage tank with a heating coil according to claim 1, characterized in that: The internal volume of the tank body (1) is greater than 335 cubic meters. The tank body (1) is made of 304L stainless steel. A reinforcing rib (5) is arranged inside the tank body (1). A radar level meter (7) for detecting the liquid level height and a temperature detector (6) for monitoring the liquid temperature are installed on the top surface of the tank body (1).

3. The urea solution storage tank with a heating coil according to claim 1, characterized in that: The pipeline heating structure (22) comprises an outer shell (30), and a heat-insulating cotton (24) is filled between the outer shell (30) and the feed pipe (9), and a heat-insulating cable (8) for heating is inserted into the heat-insulating cotton (24).

4. The urea solution storage tank with a heating coil according to claim 1, characterized in that: The interface between the pump outlet pipe (13) and the feed pipe (9) is located outside the feed valve (10).

5. The urea solution storage tank with a heating coil according to claim 1, characterized in that: The heating coil (18) is arranged in a zigzag shape on the entire bottom surface of the tank body (1), and the heating coil (18) is made of 316L stainless steel.

6. The urea solution storage tank with a heating coil according to claim 1, characterized in that: The manhole door (3) is provided with a display screen (25) capable of displaying the liquid level and temperature, a handle (26) and a door opening valve (27) for opening the door. A sealing ring (28) is provided between the manhole door (3) and the tank body (1). The manhole door (3) is made of 304L stainless steel.

7. The urea solution storage tank with a heating coil according to claim 1, characterized in that: The top of the tank body (1) is covered with a sunshade (2), and the tank body (1) is placed on a base (17) made of concrete.

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