CN208054924U - A kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases - Google Patents
A kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases Download PDFInfo
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- CN208054924U CN208054924U CN201820413869.2U CN201820413869U CN208054924U CN 208054924 U CN208054924 U CN 208054924U CN 201820413869 U CN201820413869 U CN 201820413869U CN 208054924 U CN208054924 U CN 208054924U
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Abstract
The utility model is related to a kind of ammonia recovery systems of liquid ammonia storage tank area periodic off-gases, including liquid ammonia storage tank, fixed gas separator, ammonia collecting tank, storage of described liquefied ammonia, ammonia compressor system and fixed gas processing system；The gas outlet of liquid ammonia storage tank is connected to by A pipelines and A valve groups with the tube side air inlet of fixed gas separator, fixed gas processing system is connected to by B pipelines and B valve groups with the tube side exhaust outlet of fixed gas separator, and ammonia collecting tank is connected to by C pipelines and C stop valves with the tube side liquid outlet of fixed gas separator；The liquid outlet of storage of described liquefied ammonia is connected to by E pipelines and E stop valves with the shell-side outlet of fixed gas separator by the shell side inlet communication of D pipelines and D valve groups and fixed gas separator, ammonia compressor system.By above structure, the utility model can realize separation and collect the function of the ammonia in periodic off-gases, and the energy that the utility model is consumed is less, and the practicality is stronger.
Description
Technical field
The utility model belongs to gas concentration unit field, more particularly to a kind of recovery ammonia system of liquid ammonia storage tank area periodic off-gases
System.
Background technology
Synthesis ammonia is the pillar industries of the national economy, and yield occupies various chemical products first places, while being also that energy consumption is big
Family.As the energy, environment Double jeopardy increasingly sharpen, the energy-saving and emission-reduction of synthetic ammonia installation are imperative.
At present synthesis ammonia tank field periodic off-gases recovering ammonia technique it is basic there are three types of：Low pressure Ammonic washing tower separation and recovery, screw rod
Condensation separation recycling is directly compressed again in the recycling of compressor compresses condensation separation, ammonia compressor.
Low pressure Ammonic washing tower separates and recovers：The ammonia flashed vapour come out from liquid ammonia storage tank, liquefied ammonia letdown tank and liquid ammonia ball tank is sent to
Low pressure Ammonic washing tower is sent to combustion system by blow-down pipe with the flashed vapour after desalination water washing and burns.Low pressure Ammonic washing tower
The concentration of the weak aqua ammonia come out with high pressure Ammonic washing tower is respectively 10% or so, and weak aqua ammonia concentration is too low, can not directly take out.
Current way is again to be sent into the weak aqua ammonia come out from high pressure Ammonic washing tower and the weak aqua ammonia come out from low pressure Ammonic washing tower together
Ammonia steaming system is distilled to recover ammonia, and the liquefied ammonia of recycling flow to storage tank, this needs to consume a large amount of steam, causes operating cost high, no
Conducive to energy-saving and emission-reduction.
Helical-lobe compressor compression condensation separates and recovers：Liquefied ammonia tank field periodic off-gases are pressurizeed using helical-lobe compressor, using following
Ring water condensation detaches gas ammonia.Due to containing a large amount of fixed gases in periodic off-gases, the partial pressure of ammonia is relatively low, and circulating water temperature cannot meet separation
Requirement, cause unit operation abnormal, and the discharge of a large amount of fixed gas, periodic off-gases cannot efficiently separate, recovery ammonia efficiency is low.
Ammonia compressor directly recycles condensation separation recycling：Liquefied ammonia tank field periodic off-gases enter two sections of ammonia compressor, by ammonia pressure
After the compression of contracting machine, fixed gas separator condensation separation is recycled.Due to the presence of a large amount of fixed gas, condensing gaseous mixture in this way
When body, ammonia compressor operating pressure is excessively high, and ammonia compressor operation energy consumption is higher, and fixed gas quilt in ammonia compressor system
Ten times or even tens times of dilution, the freezing ammonia needed is also accordingly multiplied, and is unfavorable for detaching.
Utility model content
The utility model provides a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases, by by liquid ammonia storage tank periodic off-gases
It is passed directly to carry out condensation separation in the tube side of fixed gas separator by A pipelines and A valve groups, it then again will be isolated
Liquefied ammonia be recycled in ammonia collecting tank by C pipelines and C valve groups, the fixed gas separated pass through B pipelines and B valve groups note
Enter the processing of fixed gas processing system, the liquefied ammonia in storage of described liquefied ammonia is injected to the shell of fixed gas separator by D pipelines and D valve groups
Freeze for fixed gas separator in journey, and the ammonia of liquid ammonia vaporization is injected into ammonia compressor by E pipelines and E stop valves
System is condensed into liquefied ammonia and is allowed to be connected to storage of described liquefied ammonia again.In this way, cold when making full use of liquid ammonia vaporization carrys out condensate liquid
Ammonia storage tank periodic off-gases, and vaporize formed ammonia be passed through ammonia compressor system carry out compression re-form liquefied ammonia and be back to liquefied ammonia
For recycling in storage tank, ammonia compressor system affluence cold is made full use of to come to fixed gas separator in this way, being just equivalent to
Freeze so that fixed gas separator refrigeration will not increase extra power consumption, and liquid ammonia storage tank periodic off-gases are directly injected into and do not coagulate
Condensation separation is carried out in gas separating device, rather than first compresses and condenses again, saves the energy of compression periodic off-gases, the energy consumed
Less, therefore, the utility model compared to the prior art, can greatly reduce energy consumption, and the practicality is strong.
The utility model is achieved through the following technical solutions：A kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases, including
Liquid ammonia storage tank, fixed gas separator, ammonia collecting tank, storage of described liquefied ammonia, ammonia compressor system and fixed gas processing system；
The gas outlet of the liquid ammonia storage tank passes through A pipelines and the tube side air inlet of A valve groups and the fixed gas separator
Connection, the fixed gas processing system are connected to by B pipelines and B valve groups with the tube side exhaust outlet of the fixed gas separator,
The ammonia collecting tank is connected to by C pipelines and C stop valves with the tube side liquid outlet of the fixed gas separator；
The liquid outlet of the storage of described liquefied ammonia is connected by D pipelines and D valve groups and the shell side import of the fixed gas separator
Logical, the ammonia compressor system inlets are connected to by E pipelines and E stop valves with the shell-side outlet of the fixed gas separator,
The storage of described liquefied ammonia is connected to the ammonia compressor system outlet.
Further, in order to preferably realize that the utility model, the gas phase interface of the ammonia collecting tank pass through H pipelines and H
Stop valve and the A pipeline connections.
Further, in order to preferably realize that the utility model, the liquid outlet of the ammonia collecting tank pass through F pipelines and F
Valve group is connected to the liquid ammonia storage tank.
Further, in order to which the utility model is better achieved, the gas outlet of the storage of described liquefied ammonia passes through G pipelines and G
Stop valve and the H pipeline connections and the upstream for being connected to the H stop valves.
Further, in order to which the utility model is better achieved, its interior liquid level can be detected by being provided on the ammonia collecting tank
The first tank level control system, the F valve groups include the first fluid level control valve, first tank level control system and described first
Fluid level control valve communication connection.
Further, further include small ice maker in order to which the utility model is better achieved, the air inlet of the small ice maker passes through
M pipelines and M stop valves and the A pipeline connections and the upstream for being connected to the A valve groups, the gas outlet of the small ice maker passes through
I pipelines and I stop valves and the A pipeline connections and the downstream for being connected to the A valve groups.
Further, in order to which the utility model is better achieved, the storage of described liquefied ammonia is connected by J pipelines and J stop valves
Pass through on the F pipelines and be connected to the downstream of first fluid level control valve.
Further, in order to which the utility model is better achieved, second is provided on the shell side of the fixed gas separator
Tank level control system, the D valve groups include the second fluid level control valve, second tank level control system and the second liquid level control
Valve communication connection processed.
Further, in order to which the utility model is better achieved, the B valve groups include pressure-control valve, the liquefied ammonia storage
Control pressurer system is provided with and communicated at the gas outlet of tank, the control pressurer system is connected with pressure-control valve communication.
Further, further include temperatuer detector in order to which the utility model is better achieved, the temperatuer detector connection
Tube side exhaust ports in the fixed gas separator are set.
The utility model has the advantages that compared to the prior art：
(1) liquid ammonia storage tank periodic off-gases are passed directly to fixed gas separator by the utility model by A pipelines and A valve groups
Tube side in carry out condensation separation, isolated liquefied ammonia is then recycled to ammonia collecting tank by C pipelines and C valve groups again
Interior, the fixed gas separated injects fixed gas processing system by B pipelines and B valve groups and handles, by the liquid in storage of described liquefied ammonia
Ammonia is injected by D pipelines and D valve groups in the shell side of fixed gas separator to freeze for fixed gas separator, and by liquefied ammonia vapour
The ammonia of change injects ammonia compressor system by E pipelines and E stop valves and is condensed into liquefied ammonia again and is allowed to and storage of described liquefied ammonia connects
It is logical.In this way, cold when making full use of liquid ammonia vaporization condenses liquid ammonia storage tank periodic off-gases, and vaporizes the ammonia formed and be passed through ammonia pressure
Contracting machine system carries out compression and re-forms liquefied ammonia and be back in storage of described liquefied ammonia for recycling, in this way, being just equivalent to fully
Freezed to fixed gas separator using ammonia compressor system affluence cold so that fixed gas separator refrigeration will not increase
Extra power consumption, and liquid ammonia storage tank periodic off-gases are directly injected into fixed gas separator and carry out condensation separation, rather than first compress again
Condensation, save compression periodic off-gases energy, the energy consumed is less, therefore, the utility model compared to the prior art, energy
Energy consumption is greatly reduced, the practicality is strong；
(2) the gas phase interface of the ammonia collecting tank in the utility model is by H pipelines and H stop valves and A pipeline connections,
In this way, above-mentioned H pipelines can control the pressure in ammonia collecting tank so that isolated liquefied ammonia is more smoothly flowed therein to ammonia and collected
In tank；
(3) liquid outlet of the ammonia collecting tank in the utility model is connected to by F pipelines and F valve groups with liquid ammonia storage tank, this
Sample, to form a closed loop, it is new to enhance this practicality in order to which the liquefied ammonia that will be collected into ammonia collecting tank injects in liquid ammonia storage tank
The stability of type operation；
(4) gas outlet of the storage of described liquefied ammonia in the utility model is connected by G pipelines and G stop valves with above-mentioned F pipelines
Logical, when needing the liquefied ammonia being collected into ammonia collecting tank injecting liquid ammonia storage tank, above-mentioned storage of described liquefied ammonia can pass through G pipelines
Gas is injected in towards ammonia collecting tank, to improve the pressure in ammonia collecting tank, so that the liquefied ammonia collected in ammonia collecting tank can be suitable
In profit injection liquid ammonia storage tank；
(5) it is additionally provided with the first tank level control system on the ammonia collecting tank in the utility model, is connected to above-mentioned liquid ammonia storage tank
F valve groups with ammonia collecting tank include the first fluid level control valve, first fluid level control valve and above-mentioned first tank level control system
Communication connection, above-mentioned first tank level control system can detect the liquefied ammonia liquid level in above-mentioned ammonia collecting tank, when reaching certain liquid level
When, which drives above-mentioned first fluid level control valve to open, and the liquefied ammonia in ammonia collecting tank is injected
In liquid ammonia storage tank；
(6) gas outlet of the liquid ammonia storage tank in the utility model is also provided with and communicated with small ice maker, liquid ammonia storage tank discharge
Gas can also carry out pressurized treatments by small ice maker, then be arranged again with above-mentioned A pipeline connections in this way, working as above-mentioned liquid ammonia storage tank
When the pressure value of the periodic off-gases gone out reaches certain value, the progress of fixed gas separator can be injected directly from above-mentioned A pipelines
Separation can first pass through small ice maker pressurization, then when the pressure value of the periodic off-gases of liquid ammonia storage tank discharge is less than certain value
It is passed through again in fixed gas separator tube side, it is enough to ensure to be passed through periodic off-gases pressure in fixed gas separator tube side with this；
(7) storage of described liquefied ammonia in the utility model and liquid ammonia storage tank liquefied ammonia inlet communication, in this way, when the liquid in storage of described liquefied ammonia
When position is less, the liquid level in storage of described liquefied ammonia is supplemented, to ensure the liquefied ammonia with sufficient amount in storage of described liquefied ammonia；
(8) it is also provided with and communicated with the second tank level control system on the shell side of the fixed gas separator in the utility model,
Be provided with the second fluid level control valve in B valve groups in above-mentioned connection storage of described liquefied ammonia and fixed gas separator shell side, and this second
Fluid level control valve is connected with the communication of above-mentioned second tank level control system, and above-mentioned second tank level control system can detect fixed gas point
Liquid level from the liquefied ammonia in device shell side, and degree of the second fluid level control valve unlatching is controlled with this, to control fixed gas point
Liquid level from the liquefied ammonia in device shell side ensures the temperature needed for periodic off-gases condensation separation, ensures the rate of recovery of ammonia in desired value.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram of the ammonia recovery system of the liquid ammonia storage tank area periodic off-gases in the utility model.
1- liquid ammonia storage tanks in figure；2- fixed gas separators；3- ammonia collecting tanks；4- liquid ammonia storage tanks；5- ammonia compressor systems；
Mono- section of entrance separator of 51-；52- ammonia compressors；6- fixed gas processing systems；The first tank level control systems of 7-；The small ice makers of 8-；9-
Second tank level control system；10- control pressurer systems；11- temperatuer detectors；12- pressure-control valves；The second Liquid levels of 13-
Valve；The first fluid level control valves of 14-；15-A pipelines；16-B pipelines；17-C pipelines；18-D pipelines；19-E pipelines；20-H pipelines；
21-F pipelines；22-G pipelines；23-M pipelines；24-I pipelines；25-J pipelines.
Specific implementation mode
It, below will be to the technology of the utility model to keep the purpose of this utility model, technical solution and advantage clearer
Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Obtained all other embodiment is put, the range that the utility model is protected is belonged to.
" upstream " described in the present embodiment, refer to liquid either gas flowing front " downstream " refer to liquid or
The rear of gas flowing namely liquid or gas are flow in " downstream " from " upstream ".
Embodiment 1：
In the present embodiment, a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases, as shown in Figure 1, including liquid ammonia storage tank 1,
Fixed gas separator 2, ammonia collecting tank 3, storage of described liquefied ammonia 4, ammonia compressor system 5 and fixed gas processing system 6, above-mentioned liquid ammonia storage tank
Liquefied ammonia containing fixed gas is housed, above-mentioned fixed gas separator 2 is the on-condensible gas that can be detached in the prior art in ammonia in 1
Equipment, then fixed gas can be discharged by the ammonia condensation in mixed gas at liquefied ammonia, this kind of fixed gas separator 2 wraps
Shell side and tube side are included, the separation process of above-mentioned mixed gas carries out in tube side, and above-mentioned shell side can be that the condensation in tube side carries out
Refrigeration, since this kind of fixed gas separator 2 has been commonly available use inside existing synthesis ammonia factory, therefore herein no longer in detail
It carefully repeats, pure liquefied ammonia is loaded in above-mentioned storage of described liquefied ammonia 4, ammonia compression can be condensed by above-mentioned ammonia compressor system 5
Liquefied ammonia, specifically, limit the ammonia compressor system 5 include connection one section of entrance separator 51 and ammonia compressor 52, this two kinds
Equipment has been commonly available use inside existing Zhi An factories, therefore is no longer repeated in detail it herein, it is above-mentioned not
Solidifying gas processing system 6 is torch or fuel gas pipe network.
The upper end of above-mentioned liquid ammonia storage tank 1 is provided with gas outlet, and the gas outlet of the liquid ammonia storage tank 1 passes through A pipelines 15 and A
Valve group is connected to the tube side air inlet of above-mentioned fixed gas separator 2, preferably, it includes being positioned close to liquid to limit the A valve groups
The A1 stop valves of ammonia storage tank 1 and A2 stop valves close to fixed gas separator 2, the periodic off-gases in above-mentioned liquid ammonia storage tank 1 can lead to
It crosses the A pipelines 15 and is passed directly into the tube side of above-mentioned fixed gas separator 2 and carry out condensation separation.Above-mentioned fixed gas processing system 6
It is connected to the gas outlet of above-mentioned 2 tube side of fixed gas separator by B pipelines 16 and B valve groups, it will be in 2 tube side of fixed gas separator
Isolated fixed gas (predominantly nitrogen and hydrogen) is passed into fixed gas processing system 6 and burns.Above-mentioned ammonia is collected
Tank 3 is connected to by C pipelines 17 and C stop valves with the liquid outlet of above-mentioned 2 tube side of fixed gas separator, in this way, above-mentioned fixed gas point
Obtained liquefied ammonia is condensed from device 2 to flow in ammonia collecting tank 3 by the C pipelines 17.
In the present embodiment, the liquid outlet of the above-mentioned storage of described liquefied ammonia 4 equipped with pure liquefied ammonia is passed through into D pipelines 18 and D valve groups
With the shell side inlet communication of above-mentioned fixed gas separator 2, in this way, generated cold is come to fixed gas point when using liquid ammonia vaporization
Tube side from device 2 freezes, in addition, the air inlet of one section of entrance separator 51 in above-mentioned ammonia compressor system 5 is passed through
E pipelines 19 and E stop valves are connected to the shell-side outlet of above-mentioned fixed gas separator 2, in this way, in above-mentioned fixed gas separator 2
The ammonia that vaporization is formed in shell side will be passed through above-mentioned one section of entrance separator 51 by E pipelines 19, then be passed through again and one section
The ammonia compressor 52 that entrance separator 51 is connected to, ammonia will be re-formed liquefied ammonia by compression and its water conservancy diversion are back to storage of described liquefied ammonia
For recycling in 4, in the process, since the ammonia being passed through in one section of entrance separator 51 is by pure liquid ammonia vaporization
, therefore without containing on-condensible gas and measured less in it, therefore compression processing is carried out to the ammonia in the ammonia compressor system 5
When, the pressure rise of ammonia compressor system condensing can't be caused and increase power consumption, be just equivalent to make full use of ammonia pressure in this way
The rich cold of one section of contracting machine carrys out the refrigeration to fixed gas separator so that and fixed gas separator refrigeration will not increase extra power consumption,
Therefore, the energy consumption of the utility model is lower.
Moreover, the periodic off-gases in liquid ammonia storage tank 1 are passed directly into fixed gas separator 2, it therefore, just need not be to periodic off-gases
Energy consumption compression is carried out, this is based on, the utility model has more energy-efficient benefit.
Embodiment 2：
The present embodiment is further improved on the basis of embodiment 1, in the present embodiment, as shown in Figure 1, above-mentioned ammonia is received
The gas phase interface at 3 top of collection tank is connected to by H pipelines 20 and H stop valves with above-mentioned A pipelines 15, in this way, when opening above-mentioned H
When stop valve, the pressure in above-mentioned A pipelines 15, H pipelines 20, ammonia collecting tank 3,2 tube side of fixed gas separator is balanced,
So that liquefied ammonia isolated in fixed gas separator 2 can more successfully flow into ammonia collecting tank 3.
Embodiment 3：
The present embodiment is further improved on the basis of embodiment 2, in the present embodiment, as shown in Figure 1, above-mentioned ammonia is received
The liquid outlet of collection tank 3 is connected to by F pipelines 21 and F valve groups with above-mentioned liquid ammonia storage tank 1, in this way, when opening above-mentioned F valve groups
It waits, the liquefied ammonia collected in ammonia collecting tank 3 will be injected by F pipelines 21 in liquid ammonia storage tank 1, with this so that the utility model shape
At a closed loop；Above-mentioned ammonia compressor system 5 condenses obtained liquefied ammonia and returns in above-mentioned storage of described liquefied ammonia 4, in this way, this practicality is new
Ammonia recovery work in periodic off-gases in type is independent from each other with ammonia freezing work, is not interfere with each other.
Embodiment 4：
The present embodiment is further improved on the basis of the above embodiments, in the present embodiment, by above-mentioned storage of described liquefied ammonia 4
Gaseous phase outlet is connected to by G pipelines 22 and G stop valves with above-mentioned H pipelines 20, and is limited the G pipelines 22 and be connected to above-mentioned H
The upstream of stop valve.In this way, when user needs the interior obtained liquefied ammonia of collecting of ammonia collecting tank 3 passing through the injection liquefied ammonia of F pipelines 21
When storage tank 1, above-mentioned H stop valves and C stop valves are closed, above-mentioned G stop valves and above-mentioned F valve groups are opened, at this point, above-mentioned liquid
Gas in ammonia storage tank 4 will inject in above-mentioned ammonia collecting tank 3, and the pressure in ammonia collecting tank 3 is made to increase, to drive
The liquefied ammonia collected in ammonia collecting tank 3 is more successfully flow in liquid ammonia storage tank 1.
Embodiment 5：
The present embodiment is further improved on the basis of the above embodiments, in the present embodiment, on above-mentioned ammonia collecting tank 3
The first tank level control system 7 of its interior liquid level can be detected by being provided with and communicated with, and it includes two stop valves and first to limit above-mentioned F valve groups
Fluid level control valve 14 and its by-pass valve, first hydraulic control valve 14 are arranged between two stop valves, above-mentioned first liquid level control
System 7 processed is connected with the communication of above-mentioned first fluid level control valve 14.First tank level control system 7 is very normal in the prior art
With the liquid level in above-mentioned ammonia collecting tank 3 can be detected, and above-mentioned first fluid level control valve 14 is controlled according to detected value
Keying degree, since tank level control system and fluid level control valve make with the use of being commonly available in the prior art
With, therefore no longer it is repeated in detail herein, user can select the Liquid level system of different model as needed
Model, the parameter etc. of system and fluid level control valve.
By above-mentioned setting, when the liquid level for the liquefied ammonia collected in above-mentioned ammonia collecting tank 3 reach a certain height, it will
Above-mentioned first tank level control system 7 is touched, which will open above-mentioned first fluid level control valve 14, with
By in the liquefied ammonia injection liquid ammonia storage tank 1 in ammonia collecting tank 3, high degree of automation realizes automatic collection, automatically controls ammonia collecting tank
Liquefied ammonia liquid level in 3, it is highly practical.
Embodiment 6：
The present embodiment is further improved on the basis of the above embodiments, further includes small ice maker 8 in the present embodiment, should
Small ice maker 8 is the helical-lobe compressor for synthesizing ammonia factory's liquefied ammonia tank field and generally using, and is commonly called as small ice maker 8.The air inlet of the small ice maker 8
Mouth is connected to by M pipelines 23 and M stop valves with above-mentioned A pipelines 15, and it (is specially the A1 in A valve groups to be connected to above-mentioned A valve groups
Stop valve) upstream, the gas outlet of the small ice maker 8 is limited by I pipelines 24 and T stop valves and above-mentioned A pipeline connections
The fixed I pipelines 24 are connected to the downstream of above-mentioned A valve groups (being specially the A1 stop valves in A valve groups).
In this way, when the pressure value of the periodic off-gases in above-mentioned liquid ammonia storage tank 1 is more than a certain predetermined value (such as 0.35MPa),
Above-mentioned M stop valves and I stop valves can be closed, at this point, above-mentioned small ice maker 8 is equivalently employed without access whole system, from above-mentioned
The periodic off-gases that liquid ammonia storage tank 1 comes out will be directly injected by A pipelines 15 in fixed gas separator 2；When above-mentioned liquid ammonia storage tank 1 comes out
Periodic off-gases pressure value be less than a certain predetermined value (such as 0.35MPa) when, above-mentioned A1 stop valves can be closed, by above-mentioned A
Stop valve and I stop valves are opened, and are pressurizeed at this point, periodic off-gases will be passed through in small ice maker 8, so that into fixed gas
Periodic off-gases pressure in separator 2 is sufficiently high, and the partial pressure of ammonia is higher, improves the rate of recovery of ammonia.
Pass through above structure so that the range that the utility model can be applicable in is wider, and practicability is stronger.
Embodiment 7：
The present embodiment is further improved on the basis of the above embodiments, and in the present embodiment, above-mentioned storage of described liquefied ammonia 4 is led to
It crosses J pipelines 25 and J stop valves is communicated on above-mentioned F pipelines 21 and limits the J pipelines 25 and are connected to above-mentioned first fluid level control valve
The downstream of 14 (F valve groups) can open J stop valves, liquid ammonia storage tank 1 in this way, when the liquefied ammonia amount in storage of described liquefied ammonia 4 is few
The liquefied ammonia collected in interior liquefied ammonia or ammonia collecting tank 3 will enter in above-mentioned storage of described liquefied ammonia 4, to ensure tool in storage of described liquefied ammonia 4
There is proper amount of liquefied ammonia.
Embodiment 8：
The present embodiment is further improved on the basis of the above embodiments, in the present embodiment, is detached in above-mentioned fixed gas
The second tank level control system 9 is provided on the shell side of device 2, it includes two stop valves and second liquid to limit above-mentioned D valve groups also
Pressure control valve 13 and its by-pass valve, second hydraulic control valve 13 are arranged between two stop valves, above-mentioned second hydraulic control
The communication of valve 13 is connected on above-mentioned second tank level control system 9.Second tank level control system 9 and above-mentioned first Liquid level
As system 7, belong to the prior art, which belongs to existing as above-mentioned first fluid level control valve 14
Technology.
Using the structure, above-mentioned second tank level control system 9 can detect the liquid in the shell side of above-mentioned fixed gas separator 2
The liquid level of ammonia, and the opening degree for the second fluid level control valve 13 being set in D pipelines 18 is controlled by detected value,
So that liquefied ammonia magnitude in above-mentioned 2 shell side of fixed gas separator is in prescribed limit class, it is cold to control fixed gas separator
Solidifying temperature realizes higher ammonia recovery with this.
Embodiment 9：
The present embodiment is further improved on the basis of the above embodiments, in the present embodiment, in above-mentioned liquid ammonia storage tank 1
Control pressurer system 10 is provided at gas outlet, which can detect at 1 gas outlet of above-mentioned liquid ammonia storage tank
The pressure of periodic off-gases is the prior art, therefore is no longer repeated in detail it herein.It includes two to limit above-mentioned B valve groups also
A stop valve and a pressure-control valve 12 and its by-pass valve, the pressure-control valve 12 connection are arranged between two stop valves,
The pressure-control valve 12 is connected with the communication of above-mentioned control pressurer system 10.
In this way, above-mentioned control pressurer system 10 can be according to the pressure value of 1 periodic off-gases of liquid ammonia storage tank detected, in basis
The degree that the detected value controls the unlatching of above-mentioned pressure-control valve 12 controls above-mentioned pressure when the periodic off-gases pressure of detection is big
Force control valve 12 opens bigger, when the periodic off-gases pressure of detection is small, controls above-mentioned pressure-control valve 12 and opens smaller, with
This mode controls the pressure size of periodic off-gases in above-mentioned liquid ammonia storage tank 1.
Embodiment 10：
The present embodiment is further improved on the basis of the above embodiments, in the present embodiment, is detached in above-mentioned fixed gas
The tube side exhaust ports of device 2 are additionally provided with temperatuer detector 11, to detect the fixed gas of 2 tube side of fixed gas separator discharge
Temperature.
Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power
Subject to the protection domain that profit requires.
Claims (10)
1. a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases, it is characterised in that：Including liquid ammonia storage tank, fixed gas separator,
Ammonia collecting tank, storage of described liquefied ammonia, ammonia compressor system and fixed gas processing system；
The gas outlet of the liquid ammonia storage tank is connected to by A pipelines and A valve groups with the tube side air inlet of the fixed gas separator,
The fixed gas processing system is connected to by B pipelines and B valve groups with the tube side exhaust outlet of the fixed gas separator, the ammonia
Collecting tank is connected to by C pipelines and C stop valves with the tube side liquid outlet of the fixed gas separator；
The liquid outlet of the storage of described liquefied ammonia passes through D pipelines and the shell side inlet communication of D valve groups and the fixed gas separator, institute
It states ammonia compressor system inlets to be connected to the shell-side outlet of the fixed gas separator by E pipelines and E stop valves, the liquid
The outlet of ammonia storage tank and the ammonia compressor system.
2. a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases according to claim 1, it is characterised in that：The ammonia is received
The gas phase interface for collecting tank passes through H pipelines and H stop valves and the A pipeline connections.
3. a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases according to claim 2, it is characterised in that：The ammonia is received
The liquid outlet of collection tank is connected to by F pipelines and F valve groups with the liquid ammonia storage tank.
4. a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases according to claim 3, it is characterised in that：The liquefied ammonia
The gas outlet of storage tank passes through G pipelines and G stop valves and the H pipeline connections and the upstream for being connected to the H stop valves.
5. a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases according to claim 4, it is characterised in that：The ammonia is received
The first tank level control system that can detect its interior liquid level is provided on collection tank, the F valve groups include the first fluid level control valve, described
First tank level control system is connected with first fluid level control valve communication.
6. a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases according to claim 5, it is characterised in that：Further include small
The air inlet of ice maker, the small ice maker by M pipelines and M stop valves and the A pipeline connections and is connected to the A valve groups
The gas outlet of upstream, the small ice maker by I pipelines and I stop valves and the A pipeline connections and is connected to the A valve groups
Downstream.
7. a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases according to claim 6, it is characterised in that：The liquefied ammonia
Storage tank is communicated on the F pipelines by J pipelines and J stop valves and is connected to the downstream of first fluid level control valve.
8. a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases according to claim 7, it is characterised in that：It is described not coagulate
The second tank level control system is provided on the shell side of gas separating device, the D valve groups include the second fluid level control valve, second liquid
Level controlling system is connected with second fluid level control valve communication.
9. a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases according to claim 8, it is characterised in that：The B valves
Group includes pressure-control valve, and control pressurer system, pressure control system are provided with and communicated at the gas outlet of the liquid ammonia storage tank
System is connected with pressure-control valve communication.
10. a kind of ammonia recovery system of liquid ammonia storage tank area periodic off-gases according to claim 9, it is characterised in that：Further include
The tube side exhaust ports in the fixed gas separator are arranged in temperatuer detector, the temperatuer detector connection.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556256A (en) * | 2019-09-25 | 2021-03-26 | 江苏航运职业技术学院 | Non-condensable gas separation system and method based on ammonia system |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112556256A (en) * | 2019-09-25 | 2021-03-26 | 江苏航运职业技术学院 | Non-condensable gas separation system and method based on ammonia system |
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