A device for removing ammonia from hydrogenated low-fraction gas

Abstract

The utility model discloses a device for deammoniation of hydrogenated low-content gas, which belongs to the field of petrochemical industry and comprises a water-washing deammoniation tower. A deammoniation zone is arranged in the water-washing deammoniation tower, and deammoniation zone is arranged in deammoniation zone. The bottom of the deammoniation zone is connected with a deammoniation liquid discharge pipe. A deammoniation liquid inlet pipe and a deammoniation air inlet pipe are also arranged on the water-washing deammoniation tower. The bottom of the deammoniation air inlet pipe is located below the liquid level of the deammoniation zone. By introducing hydrogenated low-content gas below the liquid level of deammoniation water, the gas can be fully contacted with the deammoniation water in the process of upward movement to carry out deammoniation, thereby solving the problem in the prior art that ammonia contained in hydrogenated low-content gas can cause crystallization and blockage of subsequent devices, thereby affecting the stability of the production line.

Description

Technical Field

[0001] The utility model relates to the field of petrochemical industry, in particular to a device for deammoniation of hydrogenated low-content gas. Background Art

[0002] Hydrogen is a precious resource in the petrochemical industry, and hydrogenated low-fraction gas is rich in 80% (v / v) hydrogen. It is usually sent to the PSA unit of the reforming unit for processing to obtain high-purity hydrogen as a source of hydrogen supply for refineries.

[0003] The hydrogenation unit will generate ammonia during the reaction stage, most of which will be removed in the form of ammonium salts during the water injection stage, while trace amounts of ammonia will be carried into subsequent units along with the hydrogenation low-fraction gas. The trace ammonia carried by the hydrogenation low-fraction gas and the trace chlorine carried by the reforming hydrogen can easily react to form ammonium salt crystals that clog the adsorbent and the programmable valve, causing the pressure difference of the entire adsorption tower bed to rise and the entire unit must be shut down for treatment, which seriously threatens the long-term safe and stable operation of the unit. If the ammonia in the hydrogenation low-fraction gas can be removed, the risk of shutting down the entire unit due to the increase in the pressure difference of the PSA unit of the reforming unit can be effectively reduced.

[0004] For example, the "Method and Equipment for Deodorization and Purification of Acidic Gases in Petrochemical Industry" disclosed in Chinese patent documents has a publication number of CN104147898A. The patent includes a water circulation vacuum pump, a gas-liquid separator and a refining tank. The acidic gas is pressurized to 0.1-0.2 MPa by the water circulation vacuum pump, and the pressurized acidic gas is deaminated with deionized water in the gas-liquid separator. The disadvantage of this patent is that deammoniation is achieved by pressurization, and the gas-liquid exchange is insufficient during the process, so the deammoniation effect is not good. Utility Model Content

[0005] The utility model aims to overcome the problem in the prior art that ammonia contained in hydrogenated low-fraction gas may cause crystallization and blockage of subsequent devices, thereby affecting the stability of the production line. A device for deammoniating hydrogenated low-fraction gas is provided, which can fully deammoniate the hydrogenated low-fraction gas, thereby improving the stability of the entire production line.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model discloses a device for deammonification of low-content hydrogenation gas, comprising a water-washing deammonification tower, wherein a deammonification zone is arranged in the water-washing deammonification tower, deammonification zone is arranged with desalted water, the bottom of the deammonification zone is connected with a deammonification liquid discharge pipe, a deammonification liquid inlet pipe and a deammonification air inlet pipe are also arranged on the water-washing deammonification tower, and the bottom of the deammonification air inlet pipe is located below the liquid level of the deammonification zone.

[0008] In the present application, by introducing the hydrogenated low-fraction gas below the desalted water surface, the gas can be fully contacted with the desalted water during its upward movement to carry out deamination. Compared with the prior art, it has a better deamination effect, thereby avoiding the crystallization of ammonia in the hydrogenated low-fraction gas in the subsequent device.

[0009] Preferably, a circulating pump is installed on the pipeline of the deamination liquid discharge pipe, and the deamination liquid discharge pipe is also connected to the waste liquid discharge pipe and the circulating reflux pipe, and the circulating reflux pipe is connected to the water washing deamination tower. The desalted water at the bottom can be circulated and refluxed to the deamination area by the circulating pump, thereby forming a countercurrent with the gas movement direction, thereby improving the deamination effect. The desalted water can be discharged from the waste liquid discharge pipe after a period of time, and the deamination efficiency can be ensured by adding new desalted water.

[0010] Preferably, a circulation control valve is also provided on the deamination liquid discharge pipe.

[0011] Preferably, the present application also includes a cyclone deamination device, wherein a deamination exhaust pipe is provided on the upper part of the cyclone deamination device, the deamination exhaust pipe is connected to the deamination air inlet pipe, and a centrifugal cylinder is installed in the cyclone deamination device. The cyclone deamination device can be used to separate a small amount of amine liquid in the gas.

[0012] Preferably, the cyclone deamination device further comprises a driving device, which is connected to a centrifugal cylinder, wherein a centrifugal air inlet is provided at the lower part of the centrifugal cylinder, and a centrifugal air outlet is provided at the upper part of the centrifugal cylinder. Gas and liquid can be separated by rotating the centrifugal cylinder.

[0013] Preferably, a hanging net is installed on the inner wall of the centrifugal cylinder, which can increase the contact area with the gas-liquid mixture and thus improve the separation effect.

[0014] Preferably, the cyclone deamination device further comprises a deamination air inlet pipe, which is connected to the interior of the centrifugal drum, and the air inlet direction of the deamination air inlet pipe in the centrifugal drum is tangential to the centrifugal drum. With this structure, centrifugation can be achieved without rotating the centrifugal drum.

[0015] Preferably, the present application further comprises a gathering dehydrator, and the water washing deammonification tower is connected to the gathering dehydrator through a deammonification exhaust pipe. The deammonified gas can be further dehydrated by the gathering dehydrator.

[0016] Preferably, the bottom of the aggregation dehydrator is also connected to the waste liquid discharge pipe.

[0017] Therefore, the utility model has the following beneficial effects: (1) it can more effectively deaminate hydrogenated low-fraction gas; (2) before deammoniation, the amine liquid in the gas can be separated; (3) after deammoniation, the gas can be dehydrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the cyclone deamination device of the first embodiment of the utility model.

[0020] Figure 3 It is a structural schematic diagram of a cyclone deamination device of the second embodiment of the utility model.

[0021] In the figure: cyclone deamination device 1 water washing deamination tower 2 aggregation dehydrator 3 deamination air inlet pipe 4 deamination exhaust pipe 5 waste amine liquid discharge pipe 6 centrifugal cylinder 7 driving device 8 deamination air inlet pipe 9 deamination liquid inlet pipe 10 deamination exhaust pipe 11 deamination liquid discharge pipe 12 circulation pump 13 waste liquid discharge pipe 14 circulation reflux pipe 15. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Embodiment 1, as Figure 1-2 As shown, a device for removing ammonia from low-content hydrogenated gas includes a cyclone deamination device 1, a water washing deamination tower 2 and an aggregation dehydrator 3.

[0024] The cyclone deamination device 1 is connected to an amine removal exhaust pipe 5 at the top, a waste amine liquid discharge pipe 6 at the bottom, and an amine removal air inlet pipe 4 at the side. A driving device 8 and a centrifugal cylinder 7 are installed in the cyclone deamination device 1. The driving device 8 is fixed to the top of the cyclone deamination device 1, and its drive shaft is fixedly connected to the centrifugal cylinder 7. The direction of the drive shaft and the axial direction of the centrifugal cylinder 7 are both vertical. A hanging net is installed on the inner wall of the centrifugal cylinder 7. The hanging net is a metal wire structure with mesh holes, which can increase the contact area with the gas mixture and improve the efficiency of condensation. The amine removal air inlet pipe 4 is connected to the bottom of the centrifugal cylinder 7. After the gas enters the centrifugal cylinder 7, due to the rotation of the centrifugal cylinder 7, a cyclone occurs, thereby generating centrifugal force. The centrifugal force throws the amine liquid in the gas in the form of droplets onto the side wall of the centrifugal cylinder 7 and the hanging net, and under the action of gravity, it slides down to the waste amine liquid discharge pipe 6 at the bottom and is discharged. The hydrogenated low-fraction gas after centrifugal separation enters the water washing deamination tower 2 through the amine removal exhaust pipe 5.

[0025] The deammoniation zone is provided at the lower part of the water-washing deammoniation tower 2, and a deammoniation liquid inlet pipe 10 and a deammoniation air inlet pipe are also provided on the water-washing deammoniation tower 2. The liquid inlet of the deammoniation liquid inlet pipe 10 is located above the deammoniation zone, and is used to add desalted water. After the desalted water enters the water-washing deammoniation tower 2, it falls into the deammoniation zone under the action of gravity. The deammoniation air inlet pipe is connected to the deammoniation exhaust pipe 5, and the bottom of the deammoniation air inlet pipe is located in the deammoniation zone, and the bottom of the deammoniation air inlet pipe is set as low as possible without contacting the bottom of the water-washing deammoniation tower 2, so as to increase the contact time between the gas and the deammoniation water. The bottom of the deammoniation zone is connected to the deammoniation liquid discharge pipe 12, and a circulating pump 13 is installed on the pipeline of the deammoniation liquid discharge pipe 12. The deammoniation liquid discharge pipe 12 is also connected to the waste liquid discharge pipe 14 and the circulating reflux pipe 15, and the circulating reflux pipe 15 is connected to the water-washing deammoniation tower 2.

[0026] The water washing deamination tower 2 is connected to the aggregation dehydrator 3 through the deamination exhaust pipe 11. The aggregation dehydrator 3 is also provided with a centrifugal cylinder 7 with the same structure as that of the cyclone deamination device 1, so as to perform gas-liquid separation.

[0027] The hydrogenated low-gas from the low-gas desulfurization tower of the hydrogenation unit has an ammonia content of about 1.2wt%. After entering the cyclone deamination device 1, gas-liquid separation is achieved under the action of the centrifuge 7. The hydrogenated low-gas without amine liquid is discharged from the top of the cyclone deamination device 1, and the deposited waste amine liquid is discharged from the waste amine liquid discharge pipe 6 at the bottom.

[0028] The hydrogenated low-fraction gas after deamination enters the deamination zone at the lower part of the water-wash deamination tower 2, where the hydrogenated low-fraction gas is fully mixed with the desalted water. After the desalted water is discharged from the bottom of the deamination zone, it is pressurized by a circulating pump 13 and divided into two paths, one of which returns to the water-wash deamination tower 2 and the other is discharged as waste water. The gas deaminated in the deamination zone is discharged from the top of the water-wash deamination tower 2 and enters the aggregation dehydrator 3 through the deamination exhaust pipe 11.

[0029] Gas-liquid separation is achieved under the action of the centrifugal drum 7 inside the aggregation dehydrator 3, and the hydrogenated low-fraction gas without ammonia and water, with an ammonia content of less than 0.1wt%, is discharged from the top of the aggregation dehydrator 3 and sent to the PSA unit of the reforming device as raw gas, and the deposited waste water is discharged from the bottom of the aggregation dehydrator 3.

[0030] Embodiment 2, as Figure 3 As shown, a device for removing ammonia from low-content hydrogenated gas includes a cyclone deamination device 1, a water washing deamination tower 2 and an aggregation dehydrator 3.

[0031] The cyclone deamination device 1 is connected to an amine removal exhaust pipe 5 at the top, a waste amine liquid discharge pipe 6 at the bottom, and an amine removal air inlet pipe 4 at the side. The cyclone deamination device 1 also includes an amine removal air inlet pipe 4, which is connected to the inside of the centrifugal cylinder 7, and the air intake direction of the amine removal air inlet pipe 4 in the centrifugal cylinder 7 is tangential to the centrifugal cylinder 7. A hanging net is installed on the inner wall of the centrifugal cylinder 7, and the hanging net is a metal wire structure with meshes, which can increase the contact area with the gas mixture and improve the efficiency of condensation. After the gas enters the centrifugal cylinder 7, due to its movement direction being tangential to the centrifugal cylinder 7, the gas swirls due to the guiding effect of the side wall of the centrifugal cylinder 7, thereby generating centrifugal force, which throws the amine liquid in the gas in the form of droplets onto the side wall of the centrifugal cylinder 7 and the hanging net, and under the action of gravity, slides down to the waste amine liquid discharge pipe 6 at the bottom and is discharged. The hydrogenated low-fraction gas after centrifugal separation enters the water washing deamination tower 2 through the amine removal exhaust pipe 5.

[0032] The deammoniation zone is provided at the lower part of the water-washing deammoniation tower 2, and a deammoniation liquid inlet pipe 10 and a deammoniation air inlet pipe are also provided on the water-washing deammoniation tower 2. The liquid inlet of the deammoniation liquid inlet pipe 10 is located above the deammoniation zone, and is used to add desalted water. After the desalted water enters the water-washing deammoniation tower 2, it falls into the deammoniation zone under the action of gravity. The deammoniation air inlet pipe is connected to the deammoniation exhaust pipe 5, and the bottom of the deammoniation air inlet pipe is located in the deammoniation zone, and the bottom of the deammoniation air inlet pipe is set as low as possible without contacting the bottom of the water-washing deammoniation tower 2, so as to increase the contact time between the gas and the deammoniation water. The bottom of the deammoniation zone is connected to the deammoniation liquid discharge pipe 12, and a circulating pump 13 is installed on the pipeline of the deammoniation liquid discharge pipe 12. The deammoniation liquid discharge pipe 12 is also connected to the waste liquid discharge pipe 14 and the circulating reflux pipe 15, and the circulating reflux pipe 15 is connected to the water-washing deammoniation tower 2.

[0033] The aggregation dehydrator 3 is also provided with a centrifugal cylinder 7 having the same structure as that in the cyclone deamination device 1, so as to perform gas-liquid separation.

[0034] The hydrogenated low-gas from the low-gas desulfurization tower of the hydrogenation unit has an ammonia content of about 1.2wt%. After entering the cyclone deamination device 1, gas-liquid separation is achieved under the action of the centrifuge 7. The hydrogenated low-gas without amine liquid is discharged from the top of the cyclone deamination device 1, and the deposited waste amine liquid is discharged from the waste amine liquid discharge pipe 6 at the bottom.

[0035] The hydrogenated low-fraction gas after deamination enters the deamination zone at the lower part of the water-wash deamination tower 2, where the hydrogenated low-fraction gas is fully mixed with the desalted water. After the desalted water is discharged from the bottom of the deamination zone, it is pressurized by a circulating pump 13 and divided into two paths, one of which returns to the water-wash deamination tower 2 and the other is discharged as waste water. The gas deaminated in the deamination zone is discharged from the top of the water-wash deamination tower 2 and enters the aggregation dehydrator 3 through the deamination exhaust pipe 11.

[0036] Gas-liquid separation is achieved under the action of the centrifugal drum 7 inside the aggregation dehydrator 3, and the hydrogenated low-fraction gas without ammonia and water, with an ammonia content of less than 0.1wt%, is discharged from the top of the aggregation dehydrator 3 and sent to the PSA unit of the reforming device as raw gas, and the deposited waste water is discharged from the bottom of the aggregation dehydrator 3.

[0037] Embodiment three, as Figure 1-2 As shown, a device for removing ammonia from low-content hydrogenated gas includes a cyclone deamination device 1, a water washing deamination tower 2 and an aggregation dehydrator 3.

[0038] The cyclone deamination device 1 is connected to an amine removal exhaust pipe 5 at the top, a waste amine liquid discharge pipe 6 at the bottom, and an amine removal air inlet pipe 4 at the side. A driving device 8 and a centrifugal cylinder 7 are installed in the cyclone deamination device 1. The driving device 8 is fixed to the top of the cyclone deamination device 1, and its drive shaft is fixedly connected to the centrifugal cylinder 7. The direction of the drive shaft and the axial direction of the centrifugal cylinder 7 are both vertical. A hanging net is installed on the inner wall of the centrifugal cylinder 7. The hanging net is a metal wire structure with mesh holes, which can increase the contact area with the gas mixture and improve the efficiency of condensation. The amine removal air inlet pipe 4 is connected to the bottom of the centrifugal cylinder 7. After the gas enters the centrifugal cylinder 7, due to the rotation of the centrifugal cylinder 7, a cyclone occurs, thereby generating centrifugal force. The centrifugal force throws the amine liquid in the gas in the form of droplets onto the side wall of the centrifugal cylinder 7 and the hanging net, and under the action of gravity, it slides down to the waste amine liquid discharge pipe 6 at the bottom and is discharged. The hydrogenated low-fraction gas after centrifugal separation enters the water washing deamination tower 2 through the amine removal exhaust pipe 5.

[0039] The deammoniation zone is provided at the lower part of the water-washing deammoniation tower 2, and a deammoniation liquid inlet pipe 10 and a deammoniation air inlet pipe are also provided on the water-washing deammoniation tower 2. The liquid inlet of the deammoniation liquid inlet pipe 10 is located above the deammoniation zone, and is used to add desalted water. After the desalted water enters the water-washing deammoniation tower 2, it falls into the deammoniation zone under the action of gravity. The deammoniation air inlet pipe is connected to the deammoniation exhaust pipe 5, and the bottom of the deammoniation air inlet pipe is located in the deammoniation zone, and the bottom of the deammoniation air inlet pipe is set as low as possible without contacting the bottom of the water-washing deammoniation tower 2, so as to increase the contact time between the gas and the deammoniation water. The bottom of the deammoniation zone is connected to the deammoniation liquid discharge pipe 12, and a circulating pump 13 is installed on the pipeline of the deammoniation liquid discharge pipe 12. The deammoniation liquid discharge pipe 12 is also connected to the waste liquid discharge pipe 14 and the circulating reflux pipe 15, and the circulating reflux pipe 15 is connected to the water-washing deammoniation tower 2. The deammonification drainage pipe 12 is also provided with a circulation control valve and a controller. The controller can circulate and control the flow direction of the liquid in the deammonification drainage pipe 12 by timing. After the desalted water circulates and refluxes for a certain period of time, the desalted water that has absorbed more ammonia is discharged by opening the waste liquid discharge pipe 14 and closing the circulation reflux pipe 15, so as to add new desalted water to improve the deammonification efficiency.

[0040] The aggregation dehydrator 3 is also provided with a centrifugal cylinder 7 having the same structure as that in the cyclone deamination device 1, so as to perform gas-liquid separation.

[0041] The hydrogenated low-gas from the low-gas desulfurization tower of the hydrogenation unit has an ammonia content of about 1.2wt%. After entering the cyclone deamination device 1, gas-liquid separation is achieved under the action of the centrifuge 7. The hydrogenated low-gas without amine liquid is discharged from the top of the cyclone deamination device 1, and the deposited waste amine liquid is discharged from the waste amine liquid discharge pipe 6 at the bottom.

[0042] The hydrogenated low-fraction gas after deamination enters the deamination zone at the lower part of the water-wash deamination tower 2, where the hydrogenated low-fraction gas is fully mixed with the desalted water. After the desalted water is discharged from the bottom of the deamination zone, it is pressurized by a circulating pump 13 and divided into two paths, one of which returns to the water-wash deamination tower 2 and the other is discharged as waste water. The gas deaminated in the deamination zone is discharged from the top of the water-wash deamination tower 2 and enters the aggregation dehydrator 3 through the deamination exhaust pipe 11.

[0043] Gas-liquid separation is achieved under the action of the centrifugal drum 7 inside the aggregation dehydrator 3, and the hydrogenated low-fraction gas without ammonia and water, with an ammonia content of less than 0.1wt%, is discharged from the top of the aggregation dehydrator 3 and sent to the PSA unit of the reforming device as raw gas, and the deposited waste water is discharged from the bottom of the aggregation dehydrator 3.

[0044] Embodiment 4, as Figure 1-2 As shown, a device for removing ammonia from low-content hydrogenated gas includes a cyclone deamination device 1, a water washing deamination tower 2 and an aggregation dehydrator 3.

[0045] The cyclone deamination device 1 is connected to an amine removal exhaust pipe 5 at the top, a waste amine liquid discharge pipe 6 at the bottom, and an amine removal air inlet pipe 4 at the side. A driving device 8 and a centrifugal cylinder 7 are installed in the cyclone deamination device 1. The driving device 8 is fixed to the top of the cyclone deamination device 1, and its drive shaft is fixedly connected to the centrifugal cylinder 7. The direction of the drive shaft and the axial direction of the centrifugal cylinder 7 are both vertical. A hanging net is installed on the inner wall of the centrifugal cylinder 7. The hanging net is a metal wire structure with mesh holes, which can increase the contact area with the gas mixture and improve the efficiency of condensation. The amine removal air inlet pipe 4 is connected to the bottom of the centrifugal cylinder 7. After the gas enters the centrifugal cylinder 7, due to the rotation of the centrifugal cylinder 7, a cyclone occurs, thereby generating centrifugal force. The centrifugal force throws the amine liquid in the gas in the form of droplets onto the side wall of the centrifugal cylinder 7 and the hanging net, and under the action of gravity, it slides down to the waste amine liquid discharge pipe 6 at the bottom and is discharged. The hydrogenated low-fraction gas after centrifugal separation enters the water washing deamination tower 2 through the amine removal exhaust pipe 5.

[0046] The deammoniation zone is provided at the lower part of the water-washing deammoniation tower 2, and a deammoniation liquid inlet pipe 10 and a deammoniation air inlet pipe are also provided on the water-washing deammoniation tower 2. The liquid inlet of the deammoniation liquid inlet pipe 10 is located above the deammoniation zone, and is used to add desalted water. After the desalted water enters the water-washing deammoniation tower 2, it falls into the deammoniation zone under the action of gravity. The deammoniation air inlet pipe is connected to the deammoniation exhaust pipe 5, and the bottom of the deammoniation air inlet pipe is located in the deammoniation zone, and the bottom of the deammoniation air inlet pipe is set as low as possible without contacting the bottom of the water-washing deammoniation tower 2, so as to increase the contact time between the gas and the deammoniation water. The bottom of the deammoniation zone is connected to the deammoniation liquid discharge pipe 12, and a circulating pump 13 is installed on the pipeline of the deammoniation liquid discharge pipe 12. The deammoniation liquid discharge pipe 12 is also connected to the waste liquid discharge pipe 14 and the circulating reflux pipe 15, and the circulating reflux pipe 15 is connected to the water-washing deammoniation tower 2. The deammonification liquid discharge pipe 12 is also provided with a circulation control valve, a desalted water detection device, and a controller. The controller can detect the amount of ammonia currently absorbed by the desalted water according to the desalted water detection device. When the desalted water absorbs more ammonia, the desalted water that has absorbed more ammonia is discharged by opening the waste liquid discharge pipe 14 and closing the circulation reflux pipe 15, thereby adding new desalted water to improve the deammonification efficiency. The desalted water detection device can be a pH detector that indirectly determines the amount of ammonia absorbed by the pH value, or it can be other devices that can detect the amount of ammonia absorbed.

[0047] The aggregation dehydrator 3 is also provided with a centrifugal cylinder 7 having the same structure as that in the cyclone deamination device 1, so as to perform gas-liquid separation.

[0048] The hydrogenated low-gas from the low-gas desulfurization tower of the hydrogenation unit has an ammonia content of about 1.2wt%. After entering the cyclone deamination device 1, gas-liquid separation is achieved under the action of the centrifuge 7. The hydrogenated low-gas without amine liquid is discharged from the top of the cyclone deamination device 1, and the deposited waste amine liquid is discharged from the waste amine liquid discharge pipe 6 at the bottom.

[0049] The hydrogenated low-fraction gas after deamination enters the deamination zone at the lower part of the water-wash deamination tower 2, where the hydrogenated low-fraction gas is fully mixed with the desalted water. After the desalted water is discharged from the bottom of the deamination zone, it is pressurized by a circulating pump 13 and divided into two paths, one of which returns to the water-wash deamination tower 2 and the other is discharged as waste water. The gas deaminated in the deamination zone is discharged from the top of the water-wash deamination tower 2 and enters the aggregation dehydrator 3 through the deamination exhaust pipe 11.

[0050] Gas-liquid separation is achieved under the action of the centrifugal drum 7 inside the aggregation dehydrator 3, and the hydrogenated low-fraction gas without ammonia and water, with an ammonia content of less than 0.1wt%, is discharged from the top of the aggregation dehydrator 3 and sent to the PSA unit of the reforming device as raw gas, and the deposited waste water is discharged from the bottom of the aggregation dehydrator 3.

Claims

1. A device for deammoniation of low-grade hydrogenated gas, characterized in that: It includes a water-washing deamination tower, in which a deamination zone is arranged, in which deamination zone desalted water is arranged, the bottom of the deamination zone is connected to a deamination liquid discharge pipe, and the water-washing deamination tower is also provided with a deamination liquid inlet pipe and a deamination air inlet pipe, the bottom of the deamination air inlet pipe is located below the liquid level of the deamination zone; it also includes a cyclone deamination device, in which a deamination exhaust pipe is arranged on the upper part of the cyclone deamination device, and the deamination exhaust pipe is connected to the deamination air inlet pipe.

2. The device for deamination of low-grade hydrogenated gas according to claim 1, characterized in that: A circulating pump is installed on the pipeline of the deammoniation drainage pipe, and the deammoniation drainage pipe is also connected to a waste liquid discharge pipe and a circulating reflux pipe, and the circulating reflux pipe is connected to a water-washing deammoniation tower.

3. The device for deamination of low-grade hydrogenated gas according to claim 2, characterized in that: The deamination liquid discharge pipe is also provided with a circulation control valve.

4. A device for deammoniation of low-grade hydrogenated gas according to any one of claims 1 to 3, characterized in that: A centrifugal cylinder is installed in the cyclone deamination device.

5. The device for deammoniation of low-grade hydrogenated gas according to claim 4, characterized in that: The cyclone deamination device also includes a driving device, which is connected to a centrifugal cylinder. A centrifugal air inlet is provided at the lower part of the centrifugal cylinder, and a centrifugal air outlet is provided at the upper part of the centrifugal cylinder.

6. The device for deammoniation of low-grade hydrogenated gas according to claim 5, characterized in that: A hanging net is installed on the inner wall of the centrifugal cylinder.

7. The device for deammoniation of low-grade hydrogenated gas according to claim 4, characterized in that: The cyclone deamination device also includes a deamination air inlet pipe, which is connected to the interior of the centrifugal cylinder. The air inlet direction of the deamination air inlet pipe in the centrifugal cylinder is tangential to the centrifugal cylinder.

8. The device for deammoniation of low-grade hydrogenated gas according to claim 2, characterized in that: It also includes an aggregation dehydrator, and the top of the water washing deamination tower is connected to the aggregation dehydrator through a deamination exhaust pipe.

9. The device for deammoniation of low-grade hydrogenated gas according to claim 8, characterized in that: The bottom of the aggregation dehydrator is also connected to the waste liquid discharge pipe.

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