Efficient ammonia washing device for circulating machine tail gas

Abstract

The utility model discloses an efficient ammonia washing device for tail gas of a circulator. The efficient ammonia washing device is provided with an ammonia water pump, a desalted water pump, a desalted water tank, an ammonia water tank, an ammonia washing tower, a short section, a spray head and a blow-down pipe, due to the fact that filler leakage occurs more or less in the using process of the circulating machine, when the filler leakage is light, the replacement of the filler of the circulating machine can cause the increase of the maintenance cost, the environment needs to be protected, the increase of the maintenance cost cannot be caused, and ammonia gas in tail gas is very necessary to be recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of purifying ammonia in tail gas of a circulating gas compressor (hereinafter referred to as a circulating machine), and in particular to a high-efficiency ammonia washing device for tail gas of a circulating machine. Background Art

[0002] At present, some domestic synthetic ammonia units involve circulating machines, in which the circulating machine packings will leak to a certain extent. The leaked gases mainly include hydrogen, nitrogen and ammonia. If these gases are discharged directly, it will not only cause ammonia smell on site, affecting the personal safety of personnel, but also pollute the environment. Therefore, it is very necessary to study an efficient ammonia washing device for circulating machine exhaust gas. Utility Model Content

[0003] The purpose of this utility model is to provide a highly efficient ammonia scrubbing device for circulator exhaust gas, which not only absorbs ammonia in the exhaust gas but also returns the absorbed ammonia to the urea system for recycling. The device mainly includes an ammonia pump, a desalted water pump, a desalted water tank, an ammonia tank, an ammonia scrubbing tower, a short section, a nozzle, and a vent pipe. The ammonia pump inlet is connected to the ammonia tank, the ammonia pump outlet is connected to the top of the ammonia scrubbing tower, the top of the ammonia scrubbing tower is connected to the short section via a pipeline, the nozzle is installed inside the short section, the top of the short section is connected to the vent pipe, the desalted water pump outlet is connected to the nozzle inside the short section top, and the desalted water pump is connected to the desalted water tank.

[0004] The purpose of this utility model is achieved by: the exhaust gas from the circulating machine enters the bottom of the ammonia scrubber through a pipeline. The exhaust gas and the low-concentration ammonia water (<30tt) pumped in by the ammonia water pump come into countercurrent contact in the packing layer. After the low-concentration ammonia water (<30tt) absorbs the ammonia in the exhaust gas, the ammonia water is circulated (when the ammonia concentration is ≥30tt, it is sent to the urea system for recycling). The gas leaving the ammonia scrubber enters a short section, which is equipped with a nozzle. Desalted water is pumped into the nozzle by a desalted water pump. The nozzle atomizes the desalted water, which then comes into contact with the gas leaving the ammonia scrubber. The ammonia in the gas leaving the ammonia scrubber is absorbed by the desalted water and then discharged. The ammonia water after absorbing the ammonia falls to the ammonia scrubber, mixes with the ammonia water pumped in by the ammonia water pump, and then enters the packing layer of the ammonia scrubber to absorb the ammonia in the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Attachment Figure 1 The schematic diagram of the structure connection of the utility model is shown, including 1. ammonia water pump, 2. desalted water pump, 3. desalted water tank, 4. ammonia water tank, 5. ammonia washing tower, 6. short section, 7. nozzle, and 8. vent pipe. DETAILED DESCRIPTION

[0006] The following is combined with Figure 1 The utility model is further described.

[0007] The utility model discloses a high-efficiency ammonia scrubbing device for circulator exhaust gas, which mainly comprises an ammonia pump 1, a desalted water pump 2, a desalted water tank 3, an ammonia tank 4, an ammonia scrubbing tower 5, a short section 6, a nozzle 7, and a vent pipe 8. The circulator exhaust gas enters the bottom of the ammonia scrubbing tower 5 through a pipeline. The exhaust gas and the low-concentration ammonia water (less than 30 tt) pumped into the ammonia scrubbing tower 5 by the ammonia pump 1 come into countercurrent contact within the packing layer. The low-concentration ammonia water (less than 30 tt) absorbs ammonia in the exhaust gas, and the ammonia water is then circulated (when the ammonia concentration is ≥30 tt, it is sent to the urea system for recycling). The gas exiting the ammonia scrubbing tower 5 enters the short section 6, which is equipped with a nozzle 7. The desalted water pump 2 pumps desalted water into the nozzle 7 inside the short section 6. The nozzle 7 atomizes the desalted water, which then comes into contact with the gas exiting the ammonia scrubbing tower 5. The ammonia in the gas exiting the ammonia scrubbing tower 5 is absorbed by the desalted water and then discharged through the vent pipe 8. The ammonia water after absorbing ammonia falls into the ammonia washing tower 5, mixes with the ammonia water pumped into the ammonia washing tower 2 by the ammonia water pump 1, and then enters the packing layer of the ammonia washing tower 2 to absorb ammonia in the tail gas.

Claims

1. A high-efficiency ammonia washing device for recycling machine tail gas, mainly composed of an ammonia water pump (1), a desalted water pump (2), a desalted water tank (3), an ammonia water tank (4), an ammonia washing tower (5), a short section (6), a nozzle (7), and a vent pipe (8), wherein the device is characterized in that: The inlet of the ammonia water pump (1) is connected to the ammonia water tank (4), the outlet of the ammonia water pump (1) is connected to the top of the ammonia washing tower (5), the top of the ammonia washing tower (5) is connected to the short section (6) through a pipeline, the top of the short section (6) is connected to the vent pipe (8), the outlet of the desalted water pump (2) is connected to the internal nozzle (7) at the top of the short section (6), and the desalted water pump (2) is connected to the desalted water tank (3).

2. The high-efficiency ammonia scrubbing device for recycling machine tail gas according to claim 1, characterized in that: The nozzle (7) is installed inside the short section (6).

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