Ammonia water recycling device of ammonia synthesis device

Abstract

The utility model discloses a device for recycling ammonia water of a synthetic ammonia device, and relates to the technical field of chemical production. The device comprises a storage bin, a feeding bin is arranged on one side of the storage bin, a filter screen is arranged on the bottom side of the connecting position of the feeding bin and the storage bin, a feeding pipe is communicated with the upper portion of one side of the feeding bin, and filtering filler is arranged in the feeding bin; the flow slowing plate is obliquely arranged between the inner bottom wall and the inner side wall of the storage bin; the spraying assembly is arranged on the side, close to the feeding bin, of the storage bin. Liquid drops are formed through spraying, a liquid film is formed on the flow slowing plate, the diffusion path resistance of ammonia molecules is reduced, the fixed barrel is heated through the electric heating rod, heat is transferred to ammonia water through radiation, meanwhile, the flow slowing plate and the electric heating plate directly heat the liquid film, a local high-temperature area is formed, the solubility of ammonia in a liquid phase is reduced, and ammonia gas is pushed to escape; efficient heat transfer and sufficient mixing between the ammonia water and a heat source are realized, and the escape rate of the ammonia gas is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, specifically to a device for recovering and utilizing ammonia water in a synthetic ammonia plant. Background Technology

[0002] The synthetic ammonia industry is one of the core industries in the modern chemical sector. Its product, ammonia, plays an important role in agriculture, industry, and energy as a raw material for nitrogen fertilizer, a chemical intermediate, and a clean energy carrier. However, the treatment and recovery of ammonia-water mixtures has always been a technical challenge in the synthetic ammonia production process.

[0003] Traditional ammonia recovery technology typically employs a stirring and heating method, which involves heating the ammonia-water mixture using mechanical stirring and an external heat source to induce ammonia gas to escape from the liquid phase. The gaseous ammonia is then reliquefied and recovered through a condensation system. However, this method is difficult to achieve efficient contact between the gas and liquid phases, and the ammonia gas escape rate is limited. Especially when processing high-concentration ammonia water, the diffusion resistance of ammonia molecules increases, leading to a longer recovery cycle. Therefore, we propose an ammonia recovery and utilization device for ammonia synthesis units to solve the above problems. Summary of the Invention

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0005] A device for recovering and utilizing ammonia water from a synthetic ammonia plant, comprising:

[0006] A storage silo, with a feeding silo on one side and a filter screen at the bottom of the connection between the two. A feeding pipe is connected to the top of one side of the feeding silo, and filter packing is installed inside the feeding silo.

[0007] A flow-damping plate is inclinedly disposed between the bottom wall and the inner side wall of the storage silo.

[0008] A spraying assembly is disposed on the side of the storage silo near the feed silo, and the spraying assembly is used to spray the ammonia-water mixture onto the flow buffer plate;

[0009] A heating component is disposed inside the storage silo, and the heating component is used to heat the ammonia-water mixture;

[0010] A bucket cover is connected to the top of the storage silo, and an external pipe is connected to the other end of the bucket cover. The other end of the external pipe is connected to a condenser.

[0011] Furthermore, the spraying assembly includes a support plate fixed to the inner wall of the storage silo, an installation pipe fixed to the top of the support plate, nozzles evenly spaced on the surface of the installation pipe, a water pump installed on the bottom wall of the storage silo near the feed silo, a guide pipe connected to the outlet of the water pump, and a connecting pipe connected between the guide pipe and the middle of the installation pipe.

[0012] Furthermore, the nozzle is angled upwards.

[0013] Furthermore, the end of the guide pipe away from the water pump penetrates the wall of the storage silo, and a water valve is installed on its pipe body.

[0014] Furthermore, the heating assembly includes a fixed cylinder embedded in the inner wall of the storage hopper, an electric heating rod is installed on one side of the fixed cylinder, the heating end of the electric heating rod extends into the interior of the fixed cylinder, and an electric heating plate is provided on the bottom surface of the flow-retardant plate.

[0015] Furthermore, the number of fixed cylinders is three, and they are arranged in a triangular pattern.

[0016] Furthermore, the filter media is composed of volcanic rock and quartz sand, with the volcanic rock positioned below the quartz sand.

[0017] Furthermore, the upper end of the feed hopper is an open structure and is equipped with a sealing baffle.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention forms droplets by spraying and then forms a liquid film on a flow-retarding plate, reducing the resistance to the diffusion path of ammonia molecules. The heating rod heats the fixed cylinder and transfers heat to the ammonia water through radiation. At the same time, the flow-retarding plate directly heats the liquid film, forming a local high-temperature zone, which reduces the solubility of ammonia in the liquid phase and promotes the escape of ammonia gas. This achieves efficient heat transfer and thorough mixing between the ammonia water and the heat source, significantly improving the ammonia gas escape rate. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a top view of the present invention;

[0022] Figure 3 This is a utility model Figure 2 Schematic diagram of cross-section along the middle AA direction;

[0023] Figure 4 This is a utility model Figure 2 Schematic diagram of cross-section along the middle BB direction.

[0024] Reference numerals in the attached drawings: 1. Storage bin; 2. Feed bin; 201. Sealing baffle; 3. Filter screen; 4. Feed pipe; 5. Filter packing; 6. Flow buffer; 7. Spraying assembly; 701. Support plate; 702. Mounting pipe; 703. Nozzle; 704. Water pump; 705. Guide pipe; 706. Connecting pipe; 707. Water valve; 8. Heating assembly; 801. Fixed cylinder; 802. Heating rod; 803. Heating plate; 9. Hopper cover; 10. External pipe. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0026] This application provides a device for recovering and utilizing ammonia water in a synthetic ammonia plant. It primarily addresses the challenges in achieving efficient gas-liquid two-phase contact in existing technologies, where the ammonia escape rate is limited, especially when processing high-concentration ammonia water, leading to increased diffusion resistance of ammonia molecules and prolonged recovery cycles. The application provides the following technical solution, which will be discussed in conjunction with… Figures 1-4 Please provide a detailed explanation:

[0027] A device for recovering and utilizing ammonia water from a synthetic ammonia plant, comprising:

[0028] Storage bin 1, feeding bin 2 is provided on one side of storage bin 1, and filter screen 3 is provided on the bottom side of the connection between the two. Feed pipe 4 is connected to the upper side of one side of feeding bin 2, and filter packing 5 is provided inside feeding bin 2.

[0029] The flow buffer 6 is inclinedly installed between the bottom wall and the inner side wall of the storage bin 1;

[0030] The spraying assembly 7 is installed on the side of the storage silo 1 near the feed silo 2. The spraying assembly 7 is used to spray the ammonia water mixture onto the buffer plate 6. The spraying assembly 7 includes a support plate 701 fixed to the inner wall of the storage silo 1. An installation pipe 702 is fixed to the top of the support plate 701. Spray nozzles 703 are evenly spaced on the surface of the installation pipe 702. A water pump 704 is installed on the bottom wall of the storage silo 1 near the feed silo 2. The outlet of the water pump 704 is connected to a guide pipe 705. A connecting pipe 706 is connected between the middle of the installation pipe 702 and the guide pipe 705.

[0031] Heating component 8 is installed inside storage silo 1. Heating component 8 is used to heat ammonia water mixture. Heating component 8 includes a fixed cylinder 801 fixedly embedded between the inner side walls of storage silo 1. An electric heating rod 802 is installed on one side of the fixed cylinder 801. The heating end of the electric heating rod 802 extends into the interior of the fixed cylinder. An electric heating plate 803 is provided on the bottom surface of the flow buffer 6.

[0032] The hopper cover 9 is connected to the top of the storage silo 1, and the other end of the hopper cover 9 is connected to an external pipe 10, the other end of which is connected to a condenser.

[0033] Workflow Description:

[0034] First, the ammonia-water mixture is fed into the feed hopper 2 through the feed pipe 4. After physical interception by the filter screen 3 and filter packing 5, solid impurities are removed. The filtered ammonia-water flows into the bottom of the storage hopper 1. Then, the water pump 704 at the bottom of the storage hopper 1 is started, which transports the ammonia-water through the guide pipe 705 and the connecting pipe 706 to the installation pipe 702. The ammonia-water is evenly sprayed onto the surface of the flow plate 6 by the nozzle 703. The ammonia-water flows slowly down the inclined surface of the flow plate 6, forming a thin liquid film and prolonging the gas-liquid contact time. At the same time, the fixed cylinder 801 on the inner wall of the storage hopper 1 is heated by the electric heating rod 802 to indirectly radiate heat the ammonia-water mixture. The electric heating plate 803 on the bottom surface of the flow plate 6 directly heats the liquid film, forming a "radiation + conduction" dual heating mode. After being heated, the ammonia-water molecules overcome the diffusion resistance and escape quickly to form gaseous ammonia. The gaseous ammonia is collected by the hood 9 at the top of the storage hopper 1 and enters the condenser through the external pipe 10. After liquefaction, it is recovered.

[0035] The ammonia recovery and utilization device in this ammonia synthesis unit forms droplets through spraying and forms a liquid film on the slow flow plate 6, reducing the resistance of ammonia molecule diffusion path. The electric heating rod 802 heats the fixed cylinder 801 and transfers heat to the ammonia water through radiation. At the same time, the electric heating plate 803 of the slow flow plate 6 directly heats the liquid film, forming a local high temperature zone, reducing the solubility of ammonia in the liquid phase, and promoting the escape of ammonia gas. This achieves efficient heat transfer and thorough mixing between ammonia water and the heat source, significantly improving the ammonia gas escape rate.

[0036] like Figure 3 As shown, in some embodiments, the nozzle 703 is inclined upward. More specifically, when the nozzle 703 is inclined upward, the sprayed ammonia droplets will form a parabolic trajectory under the combined action of gravity and initial velocity. This design allows the droplets to be more evenly distributed on the flow plate 6, increasing the contact area between the droplets and the flow plate 6, which is beneficial to the heating and evaporation process. The even distribution of droplets on the flow plate 6 helps to avoid local overheating or undercooling, improves heating efficiency, and reduces the negative effects that may be caused by liquid accumulation, such as liquid accumulation or uneven heating.

[0037] like Figure 4As shown, in some embodiments, the end of the guide pipe 705 away from the water pump 704 penetrates the wall of the storage silo 1, and a water valve 707 is installed on its pipe body. More specifically, during the ammonia collection process, the water valve 707 is in a closed state. After the ammonia collection is completed, the operator can open the water valve 707. After opening the water valve 707, the moisture in the storage silo 1 (if present) can be discharged from the storage silo 1 through the guide pipe 705.

[0038] like Figure 3 As shown, in some embodiments, the filter media 5 is composed of volcanic rock and quartz sand, with the volcanic rock positioned below the quartz sand. More specifically, volcanic rock is a porous, lightweight rock with a rich microporous structure. These micropores provide a large specific surface area, which helps to capture and adsorb fine particles and impurities in the ammonia mixture. The quartz sand has small interparticle gaps, which can effectively intercept suspended solids and large particulate impurities in the ammonia mixture, preventing these impurities from entering subsequent treatment equipment and protecting the equipment from wear and clogging.

[0039] like Figure 3 As shown, in some embodiments, the upper end of the feed hopper 2 is an open structure and is equipped with a sealing baffle 201. More specifically, the upper end of the feed hopper 2 adopts an open structure, which allows the operator to directly contact the filter packing 5 layer, facilitating the replacement of the packing. After long-term use, the filter packing 5 may need to be replaced due to adsorption saturation or blockage. The open design greatly simplifies this operation process. The sealing baffle 201 effectively prevents the escape of ammonia by tightly fitting the upper opening of the feed hopper 2. In the closed state, the sealing baffle 201 and the feed hopper 2 form a good sealing effect, ensuring that ammonia does not leak out of the feed hopper 2.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for recovering and utilizing ammonia water from a synthetic ammonia plant, characterized in that, include: Storage bin (1), a feeding bin (2) is provided on one side of the storage bin (1), and a filter screen (3) is provided on the bottom side of the connection between the two. A feeding pipe (4) is connected above one side of the feeding bin (2), and filter packing (5) is provided inside the feeding bin (2). A flow-retardant plate (6) is inclinedly disposed between the bottom wall and the inner side wall of the storage silo (1); A spraying assembly (7) is disposed on the side of the storage silo (1) near the feed silo (2). The spraying assembly (7) is used to spray the ammonia-water mixture onto the buffer plate (6). A heating component (8) is disposed inside the storage silo (1) and is used to heat the ammonia-water mixture. A hopper cover (9) is connected to the top of the storage silo (1), and an external pipe (10) is connected to the other end of the hopper cover (9). The other end of the external pipe (10) is connected to a condenser.

2. The apparatus according to claim 1, wherein The spraying assembly (7) includes a support plate (701) fixed to the inner wall of the storage silo (1), an installation pipe (702) fixed to the top of the support plate (701), and nozzles (703) evenly spaced on the surface of the installation pipe (702). A water pump (704) is installed on the bottom wall of the storage silo (1) near the feed silo (2). The outlet of the water pump (704) is connected to a guide pipe (705). A connecting pipe (706) is connected between the middle of the installation pipe (702) and the guide pipe (705).

3. The apparatus for recovering and utilizing ammonia water in a synthetic ammonia unit according to claim 2, characterized in that, The nozzle (703) is set at an upward angle.

4. The apparatus for recovering and utilizing ammonia water in a synthetic ammonia unit according to claim 2, characterized in that, The end of the guide pipe (705) away from the water pump (704) penetrates the wall of the storage silo (1), and a water valve (707) is installed on its pipe body.

5. The apparatus for recovering and utilizing ammonia water in a synthetic ammonia unit according to claim 1, characterized in that, The heating assembly (8) includes a fixed cylinder (801) fixedly embedded between the inner walls of the storage bin (1), an electric heating rod (802) is installed on one side of the fixed cylinder (801), the heating end of the electric heating rod (802) extends into the interior of the fixed cylinder, and an electric heating plate (803) is provided on the bottom surface of the flow plate (6).

6. The apparatus for recovering and utilizing ammonia water in a synthetic ammonia unit according to claim 5, characterized in that, The number of fixed cylinders (801) is three, and they are arranged in a triangular pattern.

7. The apparatus for recovering and utilizing ammonia water in a synthetic ammonia unit according to claim 1, characterized in that, The filter media (5) is composed of volcanic rock and quartz sand, with the volcanic rock positioned below the quartz sand.

8. The apparatus for recovering and utilizing ammonia water in a synthetic ammonia unit according to claim 1, characterized in that, The upper end of the feed hopper (2) is an open structure and is equipped with a sealing baffle (201).

Images