Low-concentration ammonia water recycling system

Abstract

The utility model discloses a low-concentration ammonia water recycling system which comprises an ammonia purifying tower, one end of the ammonia purifying tower is connected with a soft water tank through a low-concentration ammonia water pipe, one end of the soft water tank far away from the ammonia purifying tower is provided with a soft water pump, and one end of the soft water pump far away from the soft water tank is connected with ammonia water preparation equipment through a soft water pipe. A self-adjusting control valve is mounted on the water hose; compared with the prior art, produced low-concentration ammonia water is recycled to the soft water tank of the ammonia water preparation equipment, is pressurized by the soft water pump and then enters the high-concentration ammonia water preparation device, and then is sold by the ammonia water product filling pump, so that the problems that the low-concentration ammonia water is difficult to sold, low in price and easy to cause environmental pollution are solved; meanwhile, the prepared ammonia water meets the requirements of customers, is easy to sell and high in price, the purposes of reducing the cost and increasing the benefits of enterprises are really achieved, and the benefits of the enterprises are created.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonia water recovery, in particular to a low-concentration ammonia water recycling and reuse system. Background Art

[0002] The ammonia recovery station is an auxiliary supporting device of the ammonia synthesis system. It recovers ammonia from the vented air of the synthetic ammonia system. It uses desalted water and the vented air to form a large amount of ammonia water with a mass concentration of about 10% through reverse contact absorption in the ammonia purification tower. Most of this ammonia water is sent to the urea analysis station, where it is heated and distilled by steam. After heat exchange in the cooler, it forms liquid ammonia for use in urea synthesis. A small part is sent to the flue gas desulfurization.

[0003] However, in reality, the amount of low-concentration ammonia water produced at the ammonia recovery station is often greater than the amount received from the outside, resulting in the accumulation of low-concentration ammonia water in this station. Finally, a part of it is sold out at a low price through sales negotiation with customers, causing huge losses to the company. Sometimes, the ammonia water cannot be sold out, resulting in environmental pollution problems such as ammonia overflow. For this reason, the utility model proposes a low-concentration ammonia water recycling and reuse system. Utility Model Content

[0004] The purpose of the utility model is to provide a low-concentration ammonia water recycling and reuse system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-concentration ammonia water recycling and reuse system, comprising an ammonia purification tower, one end of the ammonia purification tower is connected to a soft water tank through a low-concentration ammonia water pipe, a soft water pump is installed at the end of the soft water tank away from the ammonia purification tower, the end of the soft water pump away from the soft water tank is connected to an ammonia water production device through a soft water pipe, a self-adjusting control valve is installed on the soft water pipe, the end of the ammonia water production device away from the soft water pipe is connected to a product intermediate tank through an ammonia water pipe, and an ammonia water density meter is installed on the ammonia water pipe, the end of the ammonia water pipe away from the product intermediate tank is connected to a product tank through an ammonia water shielding pump, the upper part of the product tank is connected to an absorber through a second volatile recovery pipe, and the bottom of the absorber is connected to the low-concentration ammonia water pipe through a recovery pipe.

[0006] As a preferred technical solution of the present invention, an ammonia product filling pump is installed on one side of the bottom of the product tank through a connecting pipe.

[0007] As a preferred technical solution of the present invention, the upper end of the product intermediate tank is connected to a first volatile recovery pipe, and the upper end of the first volatile recovery pipe is fixedly mounted on the second volatile recovery pipe.

[0008] As a preferred technical solution of the present invention, a second valve and a first valve are installed on the recovery pipe and the low-concentration ammonia water pipe respectively.

[0009] As a preferred technical solution of the present invention, the upper end of the ammonia water production equipment is connected to an ice machine tank through a liquid ammonia pipe.

[0010] As a preferred technical solution of the present invention, the signal output end of the ammonia density meter is connected to a DCS system, and the signal output end of the DCS system is electrically connected to the self-regulating control valve.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model discloses a low-concentration ammonia water recycling and reuse system, which recycles the generated low-concentration ammonia water to the soft water tank of the ammonia water production equipment, pressurizes it through a soft water pump to produce a high-concentration ammonia water device, and then sells it outside through an ammonia water product filling pump. It not only solves the difficulties in selling low-concentration ammonia water, which is low in price and easy to cause environmental pollution, but also reduces the urea analysis load. At the same time, it produces % ammonia water to meet customer needs, which is easy to sell and high in price, truly achieving the purpose of reducing costs and increasing efficiency for the enterprise and creating corporate benefits.

[0013] In summary, the utility model can effectively solve the problem in the existing technology that the ammonia recovery station produces a large amount of ammonia water with a mass concentration of about 10%, and cannot achieve production and consumption balance in the production process. By recovering low-concentration ammonia water and concentrating it to ammonia water with a mass concentration of 20% that meets market demand for reuse, costs are reduced, environmental pollution is avoided, and corporate profits are increased.

[0014] Other features and advantages of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] In the figure: 1. Soft water tank; 2. Soft water pump; 3. Ammonia production equipment; 4. Product intermediate tank; 5. Ammonia product filling pump; 6. Product tank; 7. Ammonia shielding pump; 8. First volatile recovery pipe; 9. Second volatile recovery pipe; 10. Ammonia density meter; 11. Absorber; 12. First valve; 13. Second valve; 14. Recovery pipe; 15. Low-concentration ammonia pipe; 16. Ammonia purification tower; 17. Soft water pipe; 18. Self-adjusting control valve; 19. Refrigerator tank. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0019] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0020] See also Figure 1In this embodiment, a low-concentration ammonia water recycling and reuse system is provided, including an ammonia purification tower 16, one end of the ammonia purification tower 16 is connected to a soft water tank 1 through a low-concentration ammonia water pipe 15, a soft water pump 2 is installed at the end of the soft water tank 1 away from the ammonia purification tower 16, the end of the soft water pump 2 away from the soft water tank 1 is connected to an ammonia water production device 3 through a soft water pipe 17, the upper end of the ammonia water production device 3 is connected to an ice machine tank 19 through a liquid ammonia pipe, the liquid ammonia delivered by the ice machine tank 19 can be used as a raw material for preparing ammonia water by the ammonia water production device 3, and the soft water delivered by the soft water pump 2 of the soft water tank 1 can dilute the liquid ammonia, thereby Ammonia water with a concentration of 20% that meets the requirements is prepared. A self-regulating control valve 18 is installed on the soft water pipe 17. The end of the ammonia water production equipment 3 away from the soft water pipe 17 is connected to the product intermediate tank 4 through the ammonia water pipe, and an ammonia water density meter 10 is installed on the ammonia water pipe. The signal output end of the ammonia water density meter 10 is connected to the DCS system, and the signal output end of the DCS system is electrically connected to the self-regulating control valve 18. When the ammonia water density meter 10 detects that the ammonia water concentration in the ammonia water pipe is greater than 20%, the DCS system controls the self-regulating control valve 18 to expand its opening, thereby increasing the soft water flow rate in the soft water pipe 17. When the ammonia water density meter 10 detects that the ammonia water concentration in the ammonia water pipe is greater than 20%, the DCS system controls the self-regulating control valve 18 to expand its opening, thereby increasing the soft water flow rate in the soft water pipe 17. When the concentration of ammonia water in the ammonia water pipe is measured to be less than 20%, the DCS system controls the self-regulating control valve 18 to reduce the opening, thereby reducing the amount of soft water passing through the soft water pipe 17, so as to adjust the output of high-concentration ammonia water to be maintained in the range of 20%. The end of the ammonia water pipe away from the product intermediate tank 4 is connected to the product tank 6 through the ammonia water shielding pump 7. The upper end of the product tank 6 is connected to the absorber 11 through the second volatile recovery pipe 9. The upper end of the product intermediate tank 4 is connected to the first volatile recovery pipe 8, and the upper end of the first volatile recovery pipe 8 is fixedly installed on the second volatile recovery pipe 9. The recovery pipe 9 can recover the liquid ammonia in the volatilized gas in the product intermediate tank 4 and the product tank 6 into the absorber 11. The bottom of the absorber 11 is connected to the low-concentration ammonia water pipe 15 through the recovery pipe 14. The recovery pipe 14 and the low-concentration ammonia water pipe 15 are respectively installed with a second valve 13 and a first valve 12. Among them, the recovery pipe 14 and the low-concentration ammonia water pipe 15 transport low-concentration ammonia water, which is recycled into the soft water tank 1 for reuse, which can effectively reduce costs and increase efficiency. An ammonia water product filling pump 5 is installed on one side of the bottom of the product tank 6 through a connecting pipe, and one end of the ammonia water product filling pump 5 is for ammonia water filling.

[0021] It can be seen that the utility model solves the problems of large amount of low-value-added and low-concentration ammonia water produced at the ammonia recovery station, which is difficult to transport outside, and a large amount of steam is consumed to extract ammonia when it is sent to the urea analysis station, resulting in large amount of ammonia water accumulation on site, excessive ammonia content in the environment, and low price for selling excess ammonia water, thereby achieving cost reduction and efficiency improvement for the enterprise.

[0022] In summary, the utility model can effectively solve the problem in the existing technology that the ammonia recovery station produces a large amount of ammonia water with a mass concentration of about 10%, and cannot achieve production and consumption balance in the production process. By recovering low-concentration ammonia water and concentrating it to ammonia water with a mass concentration of 20% that meets market demand for reuse, costs are reduced, environmental pollution is avoided, and corporate profits are increased.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A low-concentration ammonia water recycling and reuse system, characterized in that: The invention comprises an ammonia purification tower (16), one end of the ammonia purification tower (16) is connected to a soft water tank (1) through a low-concentration ammonia water pipe (15), the end of the soft water tank (1) away from the ammonia purification tower (16) is installed with a soft water pump (2), the end of the soft water pump (2) away from the soft water tank (1) is connected to an ammonia water production device (3) through a soft water pipe (17), the soft water pipe (17) is installed with a self-adjusting control valve (18), the ammonia water production device (3) away from the soft water One end of the pipe (17) is connected to the product intermediate tank (4) through an ammonia pipe, and an ammonia density meter (10) is installed on the ammonia pipe. The end of the ammonia pipe away from the product intermediate tank (4) is connected to the product tank (6) through an ammonia shielded pump (7). The upper part of the product tank (6) is connected to an absorber (11) through a second volatile recovery pipe (9). The bottom of the absorber (11) is connected to a low-concentration ammonia pipe (15) through a recovery pipe (14).

2. A low-concentration ammonia water recycling and reuse system according to claim 1, characterized in that: An ammonia product filling pump (5) is installed on one side of the bottom of the product tank (6) via a connecting pipe.

3. A low-concentration ammonia water recycling and reuse system according to claim 1, characterized in that: The upper end of the product intermediate tank (4) is connected to a first volatile recovery pipe (8), and the upper end of the first volatile recovery pipe (8) is fixedly mounted on a second volatile recovery pipe (9).

4. A low-concentration ammonia water recycling and reuse system according to claim 1, characterized in that: The recovery pipe (14) and the low-concentration ammonia water pipe (15) are respectively installed with a second valve (13) and a first valve (12).

5. The low-concentration ammonia water recycling and reuse system according to claim 1, characterized in that: The upper end of the ammonia water production equipment (3) is connected to an ice machine tank (19) via a liquid ammonia pipe.

6. A low-concentration ammonia water recycling and reuse system according to claim 1, characterized in that: The signal output end of the ammonia water density meter (10) is connected to a DCS system, and the signal output end of the DCS system is electrically connected to the self-regulating control valve (18).

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