CN217961957U - Ammonia gas recovery system - Google Patents
Ammonia gas recovery system Download PDFInfo
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- CN217961957U CN217961957U CN202120191274.9U CN202120191274U CN217961957U CN 217961957 U CN217961957 U CN 217961957U CN 202120191274 U CN202120191274 U CN 202120191274U CN 217961957 U CN217961957 U CN 217961957U
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- absorption tower
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Abstract
The utility model discloses an ammonia recovery system, which comprises a condenser, a multistage ammonia absorption tower, a multistage ammonia water storage tank, a heat exchange system and a finished product ammonia water storage tank; the multistage ammonia absorption tower comprises a plurality of ammonia absorption towers which are communicated with the condenser and are mutually communicated in sequence; a demister is arranged in the last ammonia absorption tower and is communicated with an external discharge pipeline; the multistage ammonia water storage tanks comprise ammonia water storage tanks which correspond to the ammonia absorption towers one by one; the adjacent ammonia water storage tanks are communicated through a pipeline, and a control valve and a lift pump are arranged on the pipeline; an ammonia water purification system is arranged between the ammonia absorption pump and the corresponding ammonia water storage tank; the heat exchange system comprises a circulating cooling water pool, the circulating cooling water pool is communicated with a plurality of heat exchangers through pipelines, and the heat exchangers are in one-to-one correspondence with the ammonia water storage tanks. The utility model discloses not only effectively administered the ammonia to atmospheric environment's pollution, also created certain economic benefits simultaneously, the practicality is strong, facilitate promotion and popularization.
Description
Technical Field
The utility model relates to a chemical waste gas treatment technical field particularly, relates to an ammonia recovery system.
Background
With the national proposition of building two types of society of resource conservation and environmental friendliness and the promotion and implementation of policies on energy conservation and emission reduction, many chemical plants have started to implement ammonia recycling projects. The method mainly comprises two methods, wherein an ammonia water distillation system is additionally arranged to concentrate dilute ammonia water into liquid ammonia, and an ammonia water pipeline is externally fed by a urea system to return the dilute ammonia water to an ammonium bicarbonate liquid tank and feed the dilute ammonia water and the ammonium bicarbonate liquid together to a desorption tower for desorption and recovery. The above-described method is not compatible with the production situations of many companies and cannot be applied to the production lines of most companies.
SUMMERY OF THE UTILITY MODEL
The utility model provides an ammonia recovery system to prior art's shortcoming, has solved the defect of above-mentioned technique.
In order to realize the purpose, the utility model adopts the following technical scheme:
an ammonia recovery system which characterized in that: comprises a condenser, a multistage ammonia absorption tower, a multistage ammonia water storage tank, a heat exchange system and a finished product ammonia water storage tank; the multistage ammonia absorption tower comprises a plurality of ammonia absorption towers which are communicated with the condenser and are communicated with each other in sequence; a demister is arranged in the last ammonia absorption tower and is communicated with an external discharge pipeline; the multistage ammonia water storage tanks comprise ammonia water storage tanks which correspond to the ammonia absorption towers one by one; the adjacent ammonia water storage tanks are communicated through a pipeline, and a control valve and a lift pump are arranged on the pipeline; an ammonia water purification system is arranged between the ammonia absorption pump and the corresponding ammonia water storage tank; the heat exchange system comprises a circulating cooling water pool, the circulating cooling water pool is communicated with a plurality of heat exchangers through pipelines, and the heat exchangers are in one-to-one correspondence with the ammonia water storage tanks; a control valve and a lift pump are arranged on a pipeline between the circulating cooling water tank and the heat exchanger.
According to the optimized scheme, the condenser is communicated with chilled water through a pipeline, and the condenser is respectively communicated with the external ammonia-containing tail gas and the ammonia absorption tower.
According to the optimized scheme, the multistage ammonia absorption tower comprises a first-stage ammonia absorption tower, a second-stage ammonia absorption tower and a third-stage ammonia absorption tower which are sequentially communicated through pipelines; and a control valve is arranged on the pipeline at the front end of each stage of ammonia absorption tower; a demister is arranged in the tertiary ammonia absorption tower.
According to the optimized scheme, the multistage ammonia water storage tank comprises a primary ammonia water storage tank, a secondary ammonia water storage tank and a tertiary ammonia water storage tank; the primary ammonia water storage tank is communicated with the bottom of the primary ammonia absorption tower through a pipeline; the secondary ammonia water storage tank is communicated with the bottom of the secondary ammonia absorption tower through a pipeline; the tertiary aqueous ammonia storage tank passes through the bottom of tertiary ammonia absorption tower of pipeline intercommunication.
The optimized scheme is that the ammonia water purification system comprises purification pipelines communicated between corresponding ammonia absorption towers and ammonia water storage tanks, and control valves and lift pumps are arranged on the purification pipelines.
The optimized scheme is that the number of the heat exchangers is three, and the three heat exchangers are in one-to-one correspondence with the first-level ammonia water storage tank, the second-level ammonia water storage tank and the third-level ammonia water storage tank.
By adopting the above technique, compare with prior art, the beneficial effects of the utility model are that:
the utility model discloses the realization is retrieved the ammonia that contains in the ammonia tail gas and is recycled, whole process tertiary absorption and aqueous ammonia concentration, the final aqueous ammonia of making, concentration can reach more than 20%, has not only effectively administered the ammonia to the pollution of atmospheric environment, has also created certain economic benefits simultaneously, and the practicality is strong, facilitate promotion and popularization.
Drawings
Fig. 1 is a schematic block diagram of an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
As shown in fig. 1, an ammonia recovery system comprises a condenser, a three-stage ammonia absorption tower, a three-stage ammonia storage tank, a heat exchange system and a finished product ammonia storage tank.
The condenser is communicated with chilled water through a pipeline, and the condenser is respectively communicated with the external ammonia-containing tail gas and the ammonia absorption tower.
The three-level ammonia absorption tower comprises a first-level ammonia absorption tower, a second-level ammonia absorption tower and a third-level ammonia absorption tower which are sequentially communicated through pipelines. And a control valve is arranged on the pipeline at the front end of each stage of ammonia absorption tower. The first-level ammonia absorption tower is communicated with the condenser, and the third-level ammonia absorption tower is internally provided with a demister. The demister is communicated with an external discharge pipeline.
The three-level ammonia water storage tank comprises a first-level ammonia water storage tank, a second-level ammonia water storage tank and a third-level ammonia water storage tank which are in one-to-one correspondence with the ammonia absorption towers. The primary ammonia water storage tank is communicated with the bottom of the primary ammonia absorption tower through a pipeline. The second-level ammonia water storage tank is communicated with the bottom of the second-level ammonia absorption tower through a pipeline. The tertiary ammonia water storage tank is communicated with the bottom of the tertiary ammonia absorption tower through a pipeline.
The adjacent ammonia water storage tanks are communicated through pipelines, and the pipelines are provided with control valves and lift pumps. An ammonia water purification system is arranged between the ammonia absorption pump and the corresponding ammonia water storage tank. The ammonia water purification system comprises purification pipelines communicated between the corresponding ammonia absorption tower and the ammonia water storage tank, and control valves and lift pumps are arranged on the purification pipelines.
The heat exchange system comprises a circulating cooling water pool, the circulating cooling water pool is communicated with a plurality of heat exchangers through pipelines, and the number of the heat exchangers is three, and the three heat exchangers are in one-to-one correspondence with the first-level ammonia water storage tank, the second-level ammonia water storage tank and the third-level ammonia water storage tank. And a control valve and a lifting pump are arranged on a pipeline between the circulating cooling water tank and the heat exchanger.
The temperature of the tail gas containing ammonia discharged from the reaction kettle reaches 150 ℃, and the tail gas containing ammonia is difficult to absorb by water if the tail gas is not cooled, so the tail gas firstly enters an ammonia and chilled water heat exchange system before entering an ammonia absorption tower to be cooled. The temperature of ammonia gas is a key factor affecting the efficiency of absorption, so temperature is one of the main targets of system control. The tail gas is introduced to the ammonia absorption tower, and through the water absorption of three ammonia absorption towers, the ammonia is all absorbed in the absorption liquid, and the tail gas that accords with emission standard is discharged in the upper air after the defroster defogging at tertiary ammonia absorption tower top. The ammonia absorption in the ammonia absorption tower is exothermic reaction, and at the absorption in-process, the absorption liquid temperature can rise gradually, and the temperature rise can reduce the solubility of ammonia in aqueous, and the high absorption process that is unfavorable for of temperature consequently sets up aqueous ammonia and circulative cooling water heat exchange system to reduce the temperature of absorbent, improve the absorption efficiency of system. The concentration of the ammonia water in the tertiary ammonia absorption tower is different, the ammonia water concentration in the primary ammonia absorption tower is the highest, the ammonia water concentration in the secondary ammonia absorption tower is the second, the ammonia water concentration in the tertiary ammonia absorption tower is the lowest, and therefore the ammonia water concentration system is arranged. The working principle of the ammonia water concentration system is that saturated ammonia water is conveyed to a finished product ammonia water storage container, and low-concentration ammonia water is sequentially lifted to a previous-level absorption device to realize the concentration function.
The utility model discloses the realization is retrieved the ammonia that contains in the ammonia tail gas and is recycled, whole process tertiary absorption and aqueous ammonia concentration, the final aqueous ammonia of making, concentration can reach more than 20%, has not only effectively administered the ammonia to the pollution of atmospheric environment, has also created certain economic benefits simultaneously, and the practicality is strong, facilitate promotion and popularization.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. An ammonia recovery system which characterized in that: comprises a condenser, a multistage ammonia absorption tower, a multistage ammonia water storage tank, a heat exchange system and a finished product ammonia water storage tank;
the multistage ammonia absorption tower comprises a plurality of ammonia absorption towers which are communicated with the condenser and are communicated with each other in sequence; a demister is arranged in the last ammonia absorption tower and is communicated with an external discharge pipeline;
the multistage ammonia water storage tanks comprise ammonia water storage tanks which correspond to the ammonia absorption towers one by one; the adjacent ammonia water storage tanks are communicated through a pipeline, and a control valve and a lift pump are arranged on the pipeline; an ammonia water purification system is arranged between the ammonia absorption pump and the corresponding ammonia water storage tank;
the heat exchange system comprises a circulating cooling water pool, the circulating cooling water pool is communicated with a plurality of heat exchangers through pipelines, and the heat exchangers are in one-to-one correspondence with the ammonia water storage tanks; and a control valve and a lifting pump are arranged on a pipeline between the circulating cooling water tank and the heat exchanger.
2. An ammonia gas recovery system as defined in claim 1 wherein: the condenser is communicated with chilled water through a pipeline, and the condenser is respectively communicated with the external ammonia-containing tail gas and the ammonia absorption tower.
3. An ammonia gas recovery system as defined in claim 2 wherein: the multistage ammonia absorption tower comprises a first-stage ammonia absorption tower, a second-stage ammonia absorption tower and a third-stage ammonia absorption tower which are sequentially communicated through pipelines; and a control valve is arranged on the pipeline at the front end of each stage of ammonia absorption tower; a demister is arranged in the third-stage ammonia absorption tower.
4. An ammonia gas recovery system as defined in claim 3 wherein: the multistage ammonia water storage tanks comprise a primary ammonia water storage tank, a secondary ammonia water storage tank and a tertiary ammonia water storage tank; the primary ammonia water storage tank is communicated with the bottom of the primary ammonia absorption tower through a pipeline; the secondary ammonia water storage tank is communicated with the bottom of the secondary ammonia absorption tower through a pipeline; the tertiary ammonia water storage tank is communicated with the bottom of the tertiary ammonia absorption tower through a pipeline.
5. An ammonia gas recovery system as defined in claim 4 wherein: the ammonia water purification system comprises purification pipelines communicated between the corresponding ammonia absorption tower and the ammonia water storage tank, and control valves and lift pumps are arranged on the purification pipelines.
6. An ammonia gas recovery system as defined in claim 5 wherein: the number of the heat exchangers is three, and the heat exchangers are in one-to-one correspondence with the first-level ammonia water storage tank, the second-level ammonia water storage tank and the third-level ammonia water storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120191274.9U CN217961957U (en) | 2021-01-22 | 2021-01-22 | Ammonia gas recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120191274.9U CN217961957U (en) | 2021-01-22 | 2021-01-22 | Ammonia gas recovery system |
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| Publication Number | Publication Date |
|---|---|
| CN217961957U true CN217961957U (en) | 2022-12-06 |
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| CN202120191274.9U Active CN217961957U (en) | 2021-01-22 | 2021-01-22 | Ammonia gas recovery system |
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| CN (1) | CN217961957U (en) |
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2021
- 2021-01-22 CN CN202120191274.9U patent/CN217961957U/en active Active
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