Urea dissolving storage tank

Abstract

The utility model discloses a urea dissolving storage tank, which relates to the technical field of storage tanks and comprises a partition plate positioned in an inner cavity of a shell, a dissolving area is arranged above the partition plate, a storage area is arranged below the partition plate, and a solution overflow pipe is mounted on the surface of the partition plate in a penetrating manner. A plurality of groups of heat exchange tube bundles are fixedly mounted in the inner cavity of the shell, one end of each heat exchange tube bundle penetrates through the side wall of the shell and is connected with a steam inlet, the other end of each heat exchange tube bundle penetrates through the side wall of the shell and is connected with a condensate water outlet, a liquid outlet is formed in the bottom end of the shell and is connected with a delivery pump through a pipeline, and the delivery pump is connected with a urea reaction system. According to the utility model, a urea dissolving system and a urea solution storage system are combined into a whole, and through the integrated modular arrangement of a process system device, the traditional process flow is simplified, and the number of equipment and the occupied area are reduced, so that the investment cost is reduced. In addition, due to the integrated and modular design of the device, installation and maintenance are more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of storage tanks, in particular to a urea dissolution storage tank. Background Art

[0002] Traditional hydrolysis or pyrolysis for ammonia production and denitration both require urea dissolution and urea solution storage of solid granular urea. The process system devices are basically similar. Generally, there are two sets of process system devices, including a urea solution dissolution system and a urea solution storage system. The two process systems are set separately. The main devices in the urea solution dissolution system include 1 - 2 urea dissolution tanks, solution pumps, etc. The main devices in the urea solution storage system include one standby urea solution storage tank, transfer pumps, etc. The stored urea solution is transported to the subsequent ammonia production device, namely the hydrolyzer for hydrolysis or the pyrolysis furnace for pyrolysis to produce ammonia. Due to the large number of devices, large floor area, high investment, and complex operation of the two - set process systems, a urea dissolution storage tank with a compact structure, simple operation, and small floor area is needed. Therefore, a urea dissolution storage tank is proposed. Summary of the Utility Model

[0003] To solve the above problems, that is, to solve the problems raised in the above background art, the utility model proposes a urea dissolution storage tank, which includes a shell. A urea particle inlet and a solution injection port are opened above the shell. A partition partition is fixedly installed in the inner cavity of the shell. The part above the partition partition is a dissolution area, and the part below the partition partition is a storage area. A solution overflow pipe is penetrated and installed on the surface of the partition partition. A number of groups of heat exchange tube bundles are also fixedly installed in the inner cavity of the shell. One end of the heat exchange tube bundle penetrates through the side wall of the shell and is installed with a steam inlet, and the other end of the heat exchange tube bundle penetrates through the side wall of the shell and is installed with a condensate outlet. A liquid outlet is provided at the bottom end of the shell, and the liquid outlet is connected to a transfer pump through a pipeline.

[0004] The further setting of the utility model is that: the transfer pump is connected to a urea reaction system, and the urea reaction system is a hydrolyzer or a pyrolysis furnace.

[0005] The further setting of the utility model is that: there are two solution overflow pipes and they are installed on the left and right sides of the surface of the partition partition.

[0006] The further setting of the utility model is that: the heat exchange tube bundle is located 10 - 20 centimeters above the partition partition, and the heat exchange tube bundle is located around the solution overflow pipe.

[0007] The further setting of the utility model is that: the partition partition is a circular steel plate, and the solution overflow pipe is a vertical circular steel pipe.

[0008] The beneficial technical effects of the present utility model are as follows: Aiming at the shortcomings of the prior art, the present utility model innovatively combines the urea dissolution system and the urea solution storage system into one. Through the integrated modular setting of the process system device, the traditional process flow is simplified, the number of devices and the floor area are reduced, thereby reducing the investment cost. In addition, the integrated and modular design of the device makes installation and maintenance more convenient, improves the operation efficiency and reliability of the system, and at the same time has the advantages of simple device, small floor area and low investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The front view of the present utility model is shown.

[0010] Figure 2 The top view of the present utility model is shown.

[0011] Reference numerals in the drawings: 1, housing; 2, urea granule inlet; 3, solution injection port; 4, partition baffle; 5, dissolution area; 6, storage area; 7, solution overflow pipe; 8, heat exchange tube bundle; 9, steam inlet; 10, condensate outlet; 11, transfer pump; 12, urea reaction system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0013] Please refer to Figure 1-2, the present utility model provides a technical solution: a urea dissolution and storage tank, including a housing 1, a urea granule inlet 2 and a solution injection port 3 are provided above the housing 1. A partition baffle 4 is fixedly installed in the inner cavity of the housing 1. The part above the partition baffle 4 is a dissolution area 5, and the part below the partition baffle 4 is a storage area 6. A solution overflow pipe 7 is installed through the surface of the partition baffle 4. A plurality of groups of heat exchange tube bundles 8 are also fixedly installed in the inner cavity of the housing 1. One end of the heat exchange tube bundle 8 penetrates through the side wall of the housing 1 and is installed with a steam inlet 9, and the other end of the heat exchange tube bundle 8 penetrates through the side wall of the housing 1 and is installed with a condensate outlet 10. A liquid outlet 11 is provided at the bottom end of the housing 1. The liquid outlet 11 is connected to a transfer pump 12 through a pipeline, and the transfer pump 12 is connected to a urea reaction system 13. The urea reaction system 12 is a hydrolyzer or a pyrolysis furnace. There are two solution overflow pipes 7 and they are installed on the left and right sides of the surface of the partition baffle 4. The heat exchange tube bundle 8 is located 10 - 20 cm above the partition baffle 4. The heat exchange tube bundle 8 is located around the solution overflow pipe 7. The quantity and specifications of the heat exchange tube bundle 8 can be adjusted according to actual requirements. The partition baffle 4 is a circular steel plate, and the solution overflow pipe 7 is a vertical circular steel pipe.

[0014] The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process. The specific work is as follows:

[0015] In the urea dissolution and storage tank of the present utility model, urea granules enter the dissolution area 5 through the urea granule inlet 2. In the dissolution area, the urea granules are mixed with water or other solvents, and the dissolution process is accelerated by the heat provided by the heat exchange tube bundle 8. The heat exchange tube bundle 8 introduces steam through the steam inlet 9, and transfers the heat to the urea and solvent mixture in the dissolution area through the outer wall of the heat exchange tube bundle 8, thereby promoting the dissolution of urea.

[0016] The dissolved urea solution flows into the storage area 6 through the solution overflow pipe 7, and the undissolved particles deposit on the partition baffle 4 and continue to dissolve. The function of the solution overflow pipe 7 is to ensure the liquid level difference between the dissolution area and the storage area, so that the urea solution in the dissolution area can flow smoothly into the storage area. When the liquid level in the storage area reaches a certain height, the excess solution will flow back to the dissolution area through the solution overflow pipe 7, thereby maintaining the liquid level balance between the two areas.

[0017] The urea solution in the storage area 6 is discharged through the liquid outlet 11. The liquid outlet 11 is connected to a transfer pump 12, and the transfer pump 12 transports the urea solution to the urea reaction system 13. The urea reaction system 13 can be a hydrolyzer or a pyrolysis furnace, and is selected according to actual process requirements. In the urea reaction system 13, the urea solution undergoes further chemical reactions to generate ammonia or other useful chemical substances.

[0018] The shape, quantity, and specifications of the heat exchange tube bundle 8 can be adjusted according to actual requirements to meet different heat exchange needs. For example, in the case where rapid dissolution of urea particles is required, the quantity of the heat exchange tube bundle can be increased or its specifications can be enlarged to provide more heat. In addition, the position of the heat exchange tube bundle 8 can also be optimized according to the actual technological process and spatial layout to ensure efficient heat transfer and uniform mixing of the urea solution.

[0019] 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 principles 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 dissolution and storage tank, comprising a housing (1), wherein a urea granule inlet (2) and a solution injection port (3) are provided above the housing (1), and it is characterized in that: A partition baffle (4) is fixedly installed in the inner cavity of the housing (1). The part above the partition baffle (4) is the dissolution area (5), and the part below the partition baffle (4) is the storage area (6). A solution overflow pipe (7) is installed through the surface of the partition baffle (4). A number of groups of heat exchange tube bundles (8) are also fixedly installed in the inner cavity of the housing (1). One end of the heat exchange tube bundle (8) penetrates through the side wall of the housing (1) and is installed with a steam inlet (9), and the other end of the heat exchange tube bundle (8) penetrates through the side wall of the housing (1) and is installed with a condensate outlet (10). A liquid outlet (11) is provided at the bottom end of the housing (1), and the liquid outlet (11) is connected to a transfer pump (12) through a pipeline.

2. The urea dissolution and storage tank according to claim 1, characterized in that: The transfer pump (12) is connected to a urea reaction system (13), and the urea reaction system (13) is a hydrolyzer or a pyrolysis furnace.

3. The urea dissolution and storage tank according to claim 1, characterized in that: There are two solution overflow pipes (7), which are installed on the left and right sides of the surface of the partition baffle (4).

4. A urea dissolution and storage tank according to claim 1, characterized in that: The heat exchange tube bundle (8) is located 10 - 20 cm above the partition baffle (4), and the heat exchange tube bundle (8) is located around the solution overflow pipe (7).

5. A urea dissolution and storage tank according to claim 1, characterized in that: The partition baffle (4) is a circular steel plate, and the solution overflow pipe (7) is a vertical circular steel pipe.

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