CN207108511U - The synthesis ammonia ammonia recovery system of ammonia concn can be adjusted - Google Patents
The synthesis ammonia ammonia recovery system of ammonia concn can be adjusted Download PDFInfo
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- CN207108511U CN207108511U CN201720775535.5U CN201720775535U CN207108511U CN 207108511 U CN207108511 U CN 207108511U CN 201720775535 U CN201720775535 U CN 201720775535U CN 207108511 U CN207108511 U CN 207108511U
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- ammonia
- ammoniacal liquor
- washing tower
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- ammonic washing
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Abstract
The utility model discloses a kind of synthesis ammonia ammonia recovery system that can adjust ammonia concn, the bottom ammoniacal liquor outlet line of high pressure Ammonic washing tower is connected with the ammoniacal liquor import of recirculation cooler, ammoniacal liquor is cooled in recirculation cooler, the ammoniacal liquor outlet of recirculation cooler is connected with the import in the middle part of low pressure Ammonic washing tower, the import that the bottom ammoniacal liquor outlet line of low pressure Ammonic washing tower washes ammonia pump with low pressure is connected, low pressure washes the ammoniacal liquor part that ammonia pump comes out and removes recirculation cooler, another part goes first flowmeter, the outlet of first flowmeter is connected by first flow regulating valve with ammoniacal liquor cooler, desalting pipe is connected on pipeline between first flow regulating valve and ammoniacal liquor cooler, second flowmeter and second flow regulating valve are set on the desalting pipe, the outlet of first flowmeter is additionally provided with sampling branch pipe；The outlet of ammoniacal liquor cooler is connected through ammonia concn analyzer with ammonia vessel.Convenient regulation recovery ammonia ammonia concn, can meet the needs of client is to ammonia concn.
Description
Technical field
A kind of ammonia synthesis process flow energy saving retrofit technology is the utility model is related to, it is dense to adjust ammoniacal liquor for more particularly to one kind
The synthesis ammonia ammonia recovery system of degree.
Background technology
Ammonia synthesis process main-process stream is：Natural gas from long-distance transport pipes initially enters natural gas distribution station, and natural gas exists
Gas distribution station enters after row buffering and pressure regulation to enter the normal temperature desulphurization system of synthetic ammonia installation, is then taken off by natural gas compressing, high temperature
Sulphur, one section of steam conversion of heat exchange type, two sections of oxygen-enriched air conversions, the conversion of carbon monoxide high and low temperature, improves hot potash method decarburization,
Methanation deep purifying removes remaining CO and CO2, and synthesis gas compresses, and ammonia synthesis under 14.0MPa, freezing separation, finally gives
Product liquefied ammonia.
In order to reduce the inert gas content in synthesis system circulating air, by continuously discharging portion to outside system in design
The mode of point circulating air reaches this purpose.Due to containing gas ammonia and hydrogen in dropping a hint, we be provided with high pressure Ammonic washing tower and
The membrane separation device gas ammonia and hydrogen in folding and unfolding air back and forth.Then pass through setting from the gas ammonia of liquid ammonia ball tank, the dress ammonia discharge of ammonia car
Low pressure Ammonic washing tower reclaim and utilize.
Idiographic flow is shown in CN205973826U：Periodic off-gases from synthesis system emptying (including NH3, H2, CH4, N2 etc.)
Enter from high pressure Ammonic washing tower bottom, the desalted water from removal bitter and fishiness production is compressed and washed after ammonia pump pressurizes by height and compresses and washes ammonia from height
Tower top enters, periodic off-gases and the desalted water counter current contacting in tower, and the gas ammonia inside periodic off-gases, which is desalted water and absorbed, becomes dilute ammonia
Water, the periodic off-gases after washing, which enter membrane tube, to carry out Hydrogen Separation and recycles.
Flashed vapour (including the NH discharged during from liquid ammonia ball tank and ammonia car dress ammonia3、H2、CH4、N2Deng) from low pressure Ammonic washing tower
Bottom enters, and the desalted water that ammonia pump outlet is compressed and washed from height enters from low pressure Ammonic washing tower top, and flashed vapour and desalted water are in tower
Counter current contacting, the gas ammonia inside flashed vapour, which is desalted water and absorbed, becomes weak aqua ammonia, and the flashed vapour after being washed is from low pressure Ammonic washing tower
Top is recycled after coming out into fuelgas pipeline.
The ammoniacal liquor that the ammoniacal liquor and low pressure Ammonic washing tower that high pressure Ammonic washing tower bottom comes out come out enters ammonia vessel, for taking out.
In production process, have substantial amounts of tank car daytime and draw liquefied ammonia to liquid ammonia ball tank, it is a large amount of in tank car during tank car fills ammonia
Gas ammonia is discharged in low pressure Ammonic washing tower, and this can cause the concentration of ammoniacal liquor big, is not easy to control ammonia concn, it is impossible to well meet
The ammonia concn of customer requirement.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of synthesis ammonia recovery ammonia system that can adjust ammonia concn
System, satisfaction can be to the requirement of ammonia concn.
To achieve these goals, the technical solution of the utility model is as follows：A kind of synthesis ammonia that can adjust ammonia concn
Ammonia recovery system, including high pressure Ammonic washing tower and low pressure Ammonic washing tower, the periodic off-gases from synthesis system are from the bottom of high pressure Ammonic washing tower
Periodic off-gases import enters, and the flashed vapour from liquid ammonia ball tank and ammonia car enters from the bottom flashed vapour import of low pressure Ammonic washing tower, institute
State and be provided with desalination water inlet at the top of high pressure Ammonic washing tower and low pressure Ammonic washing tower, it is characterised in that：The bottom of the high pressure Ammonic washing tower
End ammoniacal liquor outlet line is connected with the ammoniacal liquor import of recirculation cooler, and ammoniacal liquor is cooled in recirculation cooler, and the circulation is cold
But device ammoniacal liquor outlet be connected with the import in the middle part of low pressure Ammonic washing tower, the bottom ammoniacal liquor outlet line of the low pressure Ammonic washing tower with it is low
The import for compressing and washing ammonia pump is connected, and the low pressure washes the ammoniacal liquor that ammonia pump comes out and is divided into two branch pipes, and one of branch pipe is cold with circulating
But the ammoniacal liquor import of device is connected, and another branch pipe is connected with first flowmeter, and the outlet of the first flowmeter passes through first-class
Adjustable valve is connected with ammoniacal liquor cooler, and desalted water is connected on the pipeline between the first flow regulating valve and ammoniacal liquor cooler
Pipe, second flowmeter and second flow regulating valve, the outlet of the first flowmeter is set to be additionally provided with the desalting pipe
Branch pipe is sampled, sampling valve is provided with the sampling branch pipe；The outlet of the ammoniacal liquor cooler is through ammonia concn analyzer and ammonia
Tank is connected.
The ammonia concn that high pressure Ammonic washing tower bottom comes out enters circulating cooling in 10-12% or so by Liquid level adjusting valve
The import of device, ammoniacal liquor enter after recirculation cooler cools down from the middle part of low pressure Ammonic washing tower, ammoniacal liquor continue to absorb in tower from
The gas ammonia that liquid ammonia ball tank and ammonia car come, the ammonia concn in low pressure Ammonic washing tower are out laggard from the bottom of tower in 18-25% or so
Enter low pressure and wash ammonia pump, ammoniacal liquor is washed ammonia pump pressurization rear portion by low pressure and recycled into recirculation cooler, a part
Ammoniacal liquor is after first flowmeter and first flow regulating valve, and according to the demand of client, the desalted water added with desalting pipe mixes,
Adjust concentration.Mixed ammoniacal liquor, through ammonia concn analysis-e/or determining concentration, is finally sent to ammonia after the cooling of ammoniacal liquor cooler
In tank, take-away is transported.The temperature of ammoniacal liquor is cooled to 30 DEG C of ＜ by ammoniacal liquor cooler, because temperature is too high to influence ammonia concn
The accuracy of analyzer.Sampling branch pipe is periodically sampled and analyzed to ammonia concn.
In such scheme：Choke valve is additionally provided with pipeline before and after the second flow regulating valve.
In such scheme：Bypass branch is provided with the desalting pipe, the initiating terminal of the bypass branch is in second flow
Between choke valve in front of meter and second flow regulating valve, the section of end square end after second flow regulating valve of the bypass branch
The rear of valve is flowed, valve is provided with the bypass branch.
In such scheme：Desalted water from removal bitter and fishiness enters desalination water pot, the desalted water in the desalination water pot
Ammonia pump is compressed and washed by height be pumped into high pressure Ammonic washing tower and low pressure Ammonic washing tower respectively again.Enter high pressure Ammonic washing tower to desalted water and low pressure is washed
Ammonia tower provides certain pressure.
Beneficial effect：The utility model is by the way that the low concentration ammoniacal liquor in high pressure Ammonic washing tower to be used in low pressure Ammonic washing tower continue
Recycle, improve the concentration of ammoniacal liquor.Then the take-away concentration of ammoniacal liquor is adjusted by newly-increased desalting pipe, reduced due to life
The influence to reclaiming ammonia ammonia concn is produced, meets the needs of client as far as possible.
Brief description of the drawings
Fig. 1 is process chart of the present utility model.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples：
Embodiment 1, as shown in Figure 1：The synthesis ammonia ammonia recovery system of ammonia concn can be adjusted by high pressure Ammonic washing tower 1, low pressure
Ammonic washing tower 2, desalination water pot 3, height compress and wash ammonia pump 4, recirculation cooler 5, low pressure and wash ammonia pump 6, first flowmeter 7, ammoniacal liquor cooler
8th, ammonia concn analyzer 9, ammonia vessel 10, second flowmeter 11, second flow regulating valve 12, first flow regulating valve 13, take
Sample valve 14 forms.
Periodic off-gases from synthesis system enter from the bottom periodic off-gases import of high pressure Ammonic washing tower 1, from liquid ammonia ball tank and
The flashed vapour of ammonia car enters from the bottom flashed vapour import of low pressure Ammonic washing tower 2, the top of high pressure Ammonic washing tower 1 and low pressure Ammonic washing tower 2
Desalination water inlet is provided with, the desalted water from removal bitter and fishiness enters desalination water pot 3, and the desalted water in desalination water pot 3 passes through again
The too high ammonia pump 4 that compresses and washes is pumped into high pressure Ammonic washing tower 1 and low pressure Ammonic washing tower 2 respectively.
The bottom ammoniacal liquor outlet line of high pressure Ammonic washing tower 1 is connected with the ammoniacal liquor import of recirculation cooler 5, and ammoniacal liquor is cold in circulation
But it is cooled in device 5, the ammoniacal liquor outlet of recirculation cooler 5 is connected with the import at the middle part of low pressure Ammonic washing tower 2, low pressure Ammonic washing tower 2
The import that bottom ammoniacal liquor outlet line washes ammonia pump 6 with low pressure is connected, and low pressure washes the ammoniacal liquor that ammonia pump 6 comes out and is divided into two branch pipes, its
In a branch pipe be connected with the ammoniacal liquor import of recirculation cooler 5, another branch pipe is connected with first flowmeter 7, first flowmeter 7
Outlet be connected by first flow regulating valve 13 with ammoniacal liquor cooler 8, between first flow regulating valve 13 and ammoniacal liquor cooler 8
Pipeline on connect desalting pipe, second flowmeter 11 and second flow regulating valve 12, second are set on the desalting pipe
Choke valve 15 is additionally provided with pipeline before and after adjustable valve 12.Bypass branch is provided with desalting pipe, the bypass branch
Initiating terminal is between the choke valve 15 in second flowmeter 11 and the front of second flow regulating valve 12, and the end of the bypass branch is the
The rear of the choke valve 15 of square end after two flow control valves 12.Valve 16 is provided with the bypass branch.First flowmeter 7
Outlet is additionally provided with sampling branch pipe, and sampling valve 14 is provided with the sampling branch pipe；The outlet of ammoniacal liquor cooler 8 is through ammonia concn
Analyzer 9 is connected with ammonia vessel 10.By sampling valve sampling analysis, the output control analyzed by ammonia concn analyzer takes off
The addition of salt solution, that is, the aperture of second flow regulating valve 12 is controlled, this controlling extent is prior art.
The utility model is not limited to above-mentioned specific embodiment, it will be appreciated that one of ordinary skill in the art is without wound
The property made work can makes many modifications and variations according to design of the present utility model.In a word, all technologies in the art
Personnel can be obtained by logical analysis, reasoning, or a limited experiment on the basis of existing technology according to design of the present utility model
The technical scheme arrived, all should be in the protection domain being defined in the patent claims.
Claims (4)
1. a kind of synthesis ammonia ammonia recovery system that can adjust ammonia concn, including high pressure Ammonic washing tower (1) and low pressure Ammonic washing tower (2),
Periodic off-gases from synthesis system enter from the bottom periodic off-gases import of high pressure Ammonic washing tower (1), from liquid ammonia ball tank and ammonia car
Flashed vapour enters from the bottom flashed vapour import of low pressure Ammonic washing tower (2), the high pressure Ammonic washing tower (1) and low pressure Ammonic washing tower (2)
Top is provided with desalination water inlet, it is characterised in that：The bottom ammoniacal liquor outlet line and circulating cooling of the high pressure Ammonic washing tower (1)
The ammoniacal liquor import of device (5) is connected, and ammoniacal liquor is cooled in recirculation cooler (5), the outlet of the ammoniacal liquor of the recirculation cooler (5) with
Import in the middle part of low pressure Ammonic washing tower (2) is connected, and bottom ammoniacal liquor outlet line and the low pressure of the low pressure Ammonic washing tower (2) wash ammonia pump
(6) import is connected, and the low pressure washes the ammoniacal liquor that ammonia pump (6) comes out and is divided into two branch pipes, one of branch pipe and circulating cooling
The ammoniacal liquor import of device (5) is connected, and another branch pipe is connected with first flowmeter (7), and the outlet of the first flowmeter (7) passes through
First flow regulating valve (13) is connected with ammoniacal liquor cooler (8), the first flow regulating valve (13) and ammoniacal liquor cooler (8) it
Between pipeline on connect desalting pipe, second flowmeter (11) and second flow regulating valve (12) is set on the desalting pipe,
The outlet of the first flowmeter (7) is additionally provided with sampling branch pipe, and sampling valve (14) is provided with the sampling branch pipe；The ammonia
The outlet of water cooler (8) is connected through ammonia concn analyzer (9) with ammonia vessel (10).
2. the synthesis ammonia ammonia recovery system of ammonia concn can be adjusted according to claim 1, it is characterised in that：The second
Choke valve (15) is additionally provided with pipeline before and after adjustable valve (12).
3. the synthesis ammonia ammonia recovery system of ammonia concn can be adjusted according to claim 2, it is characterised in that：The desalted water
Bypass branch is provided with pipe, the initiating terminal of the bypass branch is in front of second flowmeter (11) and second flow regulating valve (12)
Choke valve (15) between, the end of the bypass branch is after second flow regulating valve (12) the afterwards choke valve (15) of square end
Side, is provided with valve (16) in the bypass branch.
4. the synthesis ammonia ammonia recovery system of ammonia concn can be adjusted according to claim 1, it is characterised in that：From desalted water
The desalted water of device enters desalination water pot (3), and the desalted water in the desalination water pot (3) compresses and washes ammonia pump (4) respectively by height again
It is pumped into high pressure Ammonic washing tower (1) and low pressure Ammonic washing tower (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720775535.5U CN207108511U (en) | 2017-06-28 | 2017-06-28 | The synthesis ammonia ammonia recovery system of ammonia concn can be adjusted |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720775535.5U CN207108511U (en) | 2017-06-28 | 2017-06-28 | The synthesis ammonia ammonia recovery system of ammonia concn can be adjusted |
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| CN207108511U true CN207108511U (en) | 2018-03-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498426A (en) * | 2019-09-20 | 2019-11-26 | 中化重庆涪陵化工有限公司 | It is a kind of to digitize online ammonia concn regulating system and its method |
-
2017
- 2017-06-28 CN CN201720775535.5U patent/CN207108511U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498426A (en) * | 2019-09-20 | 2019-11-26 | 中化重庆涪陵化工有限公司 | It is a kind of to digitize online ammonia concn regulating system and its method |
| CN110498426B (en) * | 2019-09-20 | 2021-02-26 | 中化重庆涪陵化工有限公司 | Digital online ammonia water concentration adjusting system and method |
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