Waste ammonia gas recovery system
By designing a waste ammonia recycling system that contains ammonia washing towers, silk mesh fog, cloth pipes, Ballhd fillers, and freezing pipelines, the problem of low ammonia absorption in waste ammonia gas is solved, and efficient ammonia is achieved Recycling and utilization reduces environmental pollution and waste of resources.
Patent Information
- Application Number
- CN202323485332.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-12-20
AI Technical Summary
The prior art has low ammonia absorption efficiency when treating waste ammonia gas, resulting in high ammonia content in waste ammonia gas, resulting in environmental pollution and waste of resources.
Design a waste ammonia gas recovery system, including ammonia washing towers, wire mesh fog dexter, cloth water pipes, Porter ring fillers, and freezing pipelines. Effective recycling of ammonia.
Effectively reduce the content of ammonia in waste ammonia, improve the utilization of ammonia, save costs, protect the environment, and achieve significant social and economic benefits.
Smart Images
Figure CN222400877U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ammonia recovery in waste ammonia, in particular to a waste ammonia recovery system. Background Art
[0002] At present, the common method of absorbing ammonia in waste ammonia is to use desalted water for absorption. The ammonia content in the waste ammonia after absorption is high, resulting in industrial waste gas emissions not meeting standards, causing serious environmental problems and waste of resources. Phosphate solids are obtained by neutralization and absorption with phosphoric acid, and the concentration process consumes a lot of heat.
[0003] Therefore, it is necessary to design a waste ammonia recovery system to solve the above problems. Utility Model Content
[0004] In order to overcome the defects of the above-mentioned prior art, the purpose of the utility model is to provide a waste ammonia recovery system, to recycle the ammonia entrained in the waste ammonia, to obtain ammonia water, and to add it to the nitrification system, so as to recycle the ammonia in the waste ammonia, reduce the ammonia content in the waste ammonia, and improve the utilization rate of ammonia, while saving costs and achieving the purpose of protecting the environment, and obtaining significant social and economic benefits.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A waste ammonia recovery system comprises an ammonia scrubbing tower, wherein an ammonia water inlet is arranged at the top of the ammonia scrubbing tower, and a wire mesh demister, a water distribution pipe, a ball ring filler, and a waste ammonia gas inlet are arranged in sequence from top to bottom inside the ammonia scrubbing tower; the waste ammonia gas inlet is located on the side wall of the ammonia scrubbing tower, and an outer ring refrigeration pipeline and an inner ring refrigeration pipeline are arranged inside the ammonia scrubbing tower below the waste ammonia gas inlet, the outer ring refrigeration pipeline and the inner ring refrigeration pipeline are connected to a refrigerated water tank, and the bottom output end of the ammonia scrubbing tower is divided into two paths, one path is circulated and connected to the ammonia water inlet, and the other path is connected to the concentrated ammonia water inlet at the top of a concentrated ammonia water storage tank.
[0007] Atomizing fixed nozzles are evenly distributed on the water distribution pipe, and a valve is connected to the waste ammonia inlet.
[0008] The ring wall of the ball ring packing is provided with two rows of window holes, the two rows of window holes are staggered with each other, each row of window holes has five tongue blades, and the tongue blades point to the ring center respectively.
[0009] The wire mesh demister consists of two parts: a gas-liquid filter mesh pad and a grid frame. The gas-liquid filter mesh pad is woven from 316L stainless steel wire with a diameter of 0.12 mm and a support frame.
[0010] The grid frame is connected to the gas-liquid filter pad, the grid frame is placed on the upper and lower parts of the gas-liquid filter pad, and hoops and hoops are arranged in upper and lower rows on the ring side of the gas-liquid filter pad, and the diameters of the hoops and hoops are equal.
[0011] The grid frame is composed of a supporting frame and a supporting frame, and the supporting frames are connected to each other; the stabilizing frame is connected to the intersection of the supporting frame and the supporting frame, and the stabilizing frame fixes the grid frame frame.
[0012] The stainless steel wire is 316L with a diameter of 0.12 mm, and is woven into a gas-liquid filter mesh pad in a criss-cross manner. The fixing frames and the fixing frames are evenly distributed and criss-crossed inside the stainless steel wire.
[0013] The fixing frame and the fixing frame intersect vertically and horizontally, the fixing frame and the fixing frame are placed inside the gas-liquid filter pad, and the fixing frame and the fixing frame are respectively connected with the supporting frame and the supporting frame.
[0014] The inner circle freezing pipeline is located inside the outer circle freezing pipeline wrapping area.
[0015] The outer ring freezing pipeline is connected to the freezing water tank through a freezing water pump, and the inner ring freezing pipeline is connected to the freezing water tank through a liquid pipe.
[0016] Beneficial effects of the utility model:
[0017] The utility model recovers ammonia from waste ammonia to obtain 20%-25% ammonia water, which is used to supplement the denitration system, so as to achieve the recovery and utilization of ammonia in the waste ammonia generated by industrial production, reduce the ammonia content in the waste ammonia, and improve the utilization rate of ammonia, while saving costs and achieving the purpose of protecting the environment, thereby achieving significant social and economic benefits.
[0018] By recycling the ammonia entrained in the waste ammonia and adding it to the nitration system, the ammonia in the waste ammonia can be recycled, the ammonia content in the waste ammonia can be reduced, and the utilization rate of ammonia can be improved, which can save costs and protect the environment. It alleviates the high ammonia content in the waste ammonia in industrial production, high treatment costs and poor effects, resulting in high ammonia content in the waste ammonia and pollution of the atmospheric environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the wireframe structure of the utility model.
[0020] Figure 2 It is a schematic diagram of the wire frame structure of the wire mesh demister of the utility model.
[0021] Figure 3 It is a cross-sectional view of the wireframe structure of the gas-liquid filter pad of the utility model. DETAILED DESCRIPTION
[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0023] like Figure 1-Figure 3As shown: a waste ammonia recovery system, including an ammonia scrubbing tower 1, a chilled water tank 11, a concentrated ammonia water storage tank 18, a chilled water pump 10 and a circulating ammonia water pump 9.
[0024] The ammonia washing tower 1 is a structure that is narrow at the top and wide at the bottom. The top of the ammonia washing tower 1 is provided with an ammonia water inlet 4, a wire mesh demister 5, a water distribution pipe 19 and atomizing fixed nozzles 6 evenly distributed on the water distribution pipe, and a ball ring filler 7 and a waste ammonia gas inlet 8 are provided in the middle.
[0025] The ball ring packing 7 is located above the waste ammonia inlet 8, and the waste ammonia inlet 8 is connected to a valve 14; the ball ring packing 7 is made of 316L stainless steel, the ball ring packing 7 is Φ25 mm×H25 mm×0.5 mm, and the ring wall of the ball ring packing 7 has two rows of window holes, the two rows of window holes are staggered, each row of window holes has five tongues, the tongues point to the center of the ring respectively, and the window hole area accounts for 38% of the ring wall;
[0026] The wire mesh demister 5 is composed of two parts: a gas-liquid filter mesh pad 22 and a grid frame 21. The gas-liquid filter mesh pad is woven from 316L stainless steel wire 25 with a diameter of 0.12 mm and a support frame 26.
[0027] An outer ring freezing pipeline 2 and an inner ring freezing pipeline 3 are arranged outside the chilled water tank 11; a concentrated ammonia water inlet 17 is arranged at the top of the concentrated ammonia water storage tank 18.
[0028] 5% ammonia water is evenly distributed on the water distribution pipe 19, and the atomizing fixed nozzle 6 disperses the ammonia water on the ball ring packing 7, and the gas-liquid reverse flow achieves the purpose of two-phase mass transfer;
[0029] The ammonia washing tower 1 is equipped with a ball ring packing 7 and a wire mesh demister 5 to ensure the ammonia washing effect; the ammonia washing tower 1 is equipped with an outer ring refrigeration pipeline 2 and an inner ring refrigeration pipeline 3, the outer ring refrigeration pipeline 2 and the inner ring refrigeration pipeline 3 are connected in series with each other, and the inner ring refrigeration pipeline 3 is located in the inner area of the outer ring refrigeration pipeline 2, which is used to cool the ammonia water and improve the ammonia washing effect;
[0030] The chilled water tank 11 is connected to the ammonia washing tower 1 through a chilled water pump to provide a cold source for the 5% ammonia water and reduce the temperature of the ammonia water; the ammonia washing tower 1 is connected to the concentrated ammonia water storage tank 18 for recovering ammonia water resources.
[0031] In the utility model, the ammonia content in the waste ammonia gas is 10%, and 5% ammonia water is used as the washing liquid of the ammonia washing tower 1. The ammonia washing tower 1 is connected to the ammonia water cooling system to control the temperature of the 5% ammonia water. The outer ring freezing pipeline 2 and the inner ring freezing pipeline 3 of the ammonia washing tower connected to the ammonia water cooling system are respectively at 2 / 3 and 1 / 3 of the bottom diameter of the ammonia washing tower 1. 7°C chilled water is injected into the ammonia water cooling system, and the outer ring freezing pipeline 2 and the inner ring freezing pipeline 3 are injected with chilled water.
[0032] The wire mesh demister 5 is composed of two parts: a gas-liquid filter mesh pad 22 and a grid frame 21. The gas-liquid filter mesh pad 22 is woven from a 316L stainless steel wire 25 with a diameter of 0.12 mm and a support frame 26.
[0033] The grid frame 21 is connected to the gas-liquid filter mesh pad 22, and the grid frame 21 is placed on the upper and lower parts of the gas-liquid filter mesh pad 22. The upper and lower rows of hoop 1 23 and hoop 24 are arranged on the ring side of the gas-liquid filter mesh pad 22, and the diameters of the hoop 23 and the hoop 24 are equal.
[0034] The grid frame 21 is composed of a support frame 1 26 and a support frame 27, and the support frame 1 26 and the support frame 27 are connected; a stabilizing frame 29 is connected to the intersection of the support frame 1 26 and the support frame 27, and the stabilizing frame 29 fixes the grid frame 21 frame.
[0035] The stainless steel wire 25 is 316L with a diameter of 0.12 mm and is woven into a gas-liquid filter mesh pad 22 in a crisscross manner. The fixing frame 1 28 and the fixing frame 2 30 are evenly distributed and arranged inside the stainless steel wire 25 in a crisscross manner.
[0036] The fixing frame 1 28 and the fixing frame 2 30 intersect each other vertically and horizontally. The fixing frame 1 28 and the fixing frame 2 30 are placed inside the gas-liquid filter pad 22 . The fixing frame 1 28 and the fixing frame 2 30 are connected to the supporting frame 1 26 and the supporting frame 2 27 respectively.
[0037] The working principle of this utility model:
[0038] Waste ammonia gas with an ammonia concentration of 10% enters the waste ammonia gas inlet 8 in the middle of the ammonia washing tower 1 through a valve 14, and ammonia water with a content of 5% is added to the bottom of the ammonia washing tower 1. The ammonia water with a content of 5% at the bottom of the ammonia washing tower 1 submerges the outer ring refrigeration pipeline 2 and the inner ring refrigeration pipeline 3 at the bottom of the ammonia washing tower 1, but the 5% ammonia water level is lower than the waste ammonia gas inlet 8. The chilled water tank 11 uses a chilled water pump 10 to transport chilled water. The chilled water passes through the outer ring refrigeration pipeline 2 at the lower part of the ammonia washing tower 1 to cool the 5% ammonia water. The chilled water in the outer ring refrigeration pipeline 2 enters the inner ring refrigeration pipeline 3. The outer ring refrigeration pipeline 2 and the inner ring refrigeration pipeline 3 are interconnected. The inner ring refrigeration pipeline 3 is located inside the area wrapped by the outer ring refrigeration pipeline 2. The outer ring refrigeration pipeline 2 is connected to the chilled water tank 11 through the chilled water pump 10, and the inner ring refrigeration pipeline 3 is connected to the chilled water tank 11 through a liquid pipe.
[0039] The outer circle freezing pipeline 2 and the inner circle freezing pipeline 3 cool the 5% ammonia water, the freezing water in the inner circle freezing pipeline 3 returns to the freezing water tank 11, the frozen 5% ammonia water enters the circulating ammonia water pump 9 connected in series with the ammonia washing tower 1, the circulating ammonia water pump 9 transports the frozen 5% ammonia water, the 5% ammonia water enters the ammonia water inlet 4 at the top of the ammonia washing tower 1, the 5% ammonia water passes through the wire mesh demister 5 and is evenly distributed on the water supply pipe 19, the 5% ammonia water enters the atomizing fixed nozzle 6, the atomizing fixed nozzle 6 atomizes the 5% ammonia water in reverse phase to contact the waste ammonia gas, and the ammonia gas enters the cooled 5% ammonia water , the concentration of 5% ammonia water is increased, and the ammonia water with increased concentration falls to the ball ring packing 7 in the middle of the ammonia washing tower 1, continues to be evenly dispersed, fully contacts with the waste ammonia gas, and performs gas-liquid two-phase ammonia exchange. The ammonia concentration in the waste ammonia gas is reduced, and the ammonia content in 5% ammonia water is increased. The ammonia water with increased concentration exchanges heat with the cooling outer coil 2 and the cooling inner coil 3, and the ammonia water is cooled and continues to circulate and absorb ammonia through the circulating ammonia water pump 9. The concentrated ammonia water enters the concentrated ammonia water inlet 17 at the top of the concentrated ammonia water storage tank 18 through the circulating ammonia water pump 9, and the concentrated ammonia water storage tank 18 stores the concentrated ammonia water.
[0040] Example 1: 700m3 of waste ammonia gas with an original ammonia content of 10.3% 3 / h, the temperature of 5% ammonia water in the ammonia washing tower is controlled at 7℃-9℃, the ammonia content in the waste ammonia gas can be reduced to 0.43%, 52.5kg / h of ammonia gas is recovered, and 20.8% ammonia water is produced at 255.4kg / h.
[0041] Example 2: 700m3 of waste ammonia gas with an original ammonia content of 10.5% 3 / h, the temperature of 5% ammonia water in the ammonia washing tower is controlled at 6℃-7℃, the ammonia content in the waste ammonia gas can be reduced to 0.37%, 53.9kg / h of ammonia gas is recovered, and 21.3% ammonia water is produced at 252.4kg / h.
[0042] After the implementation of the utility model project, the ammonia content in the waste ammonia gas can be reduced to 0.5%. The original ammonia content of the waste ammonia gas is 10% 700m 3 / h, the corresponding ammonia loss is 53.2kg / h, after the implementation of the utility model, the ammonia loss is 0.156kg / h. The annual operation time is calculated as 7200h, and the unit price of 20% ammonia water is calculated as 700 yuan, which can save at least 1.3411 million yuan throughout the year.
Claims
1. A waste ammonia recovery system, characterized in that: The invention comprises an ammonia scrubbing tower (1), wherein an ammonia water inlet (4) is arranged at the top of the ammonia scrubbing tower (1), and a wire mesh demister (5), a water distribution pipe (19), a ball ring filler (7) and a waste ammonia gas inlet (8) are arranged in sequence from top to bottom inside the ammonia scrubbing tower (1); the waste ammonia gas inlet (8) is located on the side wall of the ammonia scrubbing tower (1), and an outer ring refrigeration pipeline (2) and an inner ring refrigeration pipeline (3) are arranged inside the ammonia scrubbing tower (1) below the waste ammonia gas inlet (8), and the outer ring refrigeration pipeline (2) and the inner ring refrigeration pipeline (3) are connected to a refrigerated water tank (11); and the bottom output end of the ammonia scrubbing tower (1) is divided into two paths, one of which is circulated and connected to the ammonia water inlet (4), and the other is connected to the concentrated ammonia water inlet (17) at the top of a concentrated ammonia water storage tank (18).
2. A waste ammonia recovery system according to claim 1, characterized in that: The water distribution pipe (19) is evenly distributed with atomizing fixed nozzles (6), and the waste ammonia inlet (8) is connected with a valve (14).
3. A waste ammonia recovery system according to claim 1, characterized in that: The ring wall of the ball ring packing (7) has two rows of window holes, the two rows of window holes are staggered, and each row of window holes has five tongues, and the tongues point to the center of the ring respectively.
4. A waste ammonia recovery system according to claim 1, characterized in that: The wire mesh demister (5) is composed of two parts: a gas-liquid filter mesh pad (22) and a grid frame (21); the gas-liquid filter mesh pad (22) is woven from 316L stainless steel wire (25) with a diameter of 0.12 mm and a support frame (26).
5. A waste ammonia recovery system according to claim 4, characterized in that: The grid frame (21) is connected to the gas-liquid filter mesh pad (22), the grid frame (21) is placed on the upper and lower parts of the gas-liquid filter mesh pad (22), and the gas-liquid filter mesh pad (22) is provided with a first hoop (23) and a second hoop (24) in two rows on the upper and lower sides of the ring side, and the diameters of the first hoop (23) and the second hoop (24) are equal.
6. A waste ammonia recovery system according to claim 5, characterized in that: The grid frame (21) is composed of a support frame 1 (26) and a support frame 2 (27), and the support frame 1 (26) and the support frame 2 (27) are connected to each other; a stabilizing frame (29) is connected to the intersection of the support frame 1 (26) and the support frame 2 (27), and the stabilizing frame (29) fixes the grid frame (21).
7. A waste ammonia recovery system according to claim 5, characterized in that: The stainless steel wire (25) is 316L with a diameter of 0.12 mm and is woven into a gas-liquid filter mesh pad (22) in a crisscross manner, and the fixing frame 1 (28) and the fixing frame 2 (30) are evenly distributed and arranged inside the stainless steel wire (25) in a crisscross manner; The fixing frame 1 (28) and the fixing frame 2 (30) intersect each other vertically and horizontally. The fixing frame 1 (28) and the fixing frame 2 (30) are placed inside the gas-liquid filter pad (22). The fixing frame 1 (28) and the fixing frame 2 (30) are respectively connected to the supporting frame 1 (26) and the supporting frame 2 (27).
8. A waste ammonia recovery system according to claim 1, characterized in that: The inner circle freezing pipeline (3) is located inside the area wrapped by the outer circle freezing pipeline (2).
9. A waste ammonia recovery system according to claim 1, characterized in that: The outer ring freezing pipeline (2) is connected to the freezing water tank (11) via a freezing water pump (10), and the inner ring freezing pipeline (3) is connected to the freezing water tank (11) via a liquid pipe.