CN103058153B - Nitrogen preparation recycle system and control method thereof - Google Patents
Nitrogen preparation recycle system and control method thereof Download PDFInfo
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- CN103058153B CN103058153B CN201210556955.6A CN201210556955A CN103058153B CN 103058153 B CN103058153 B CN 103058153B CN 201210556955 A CN201210556955 A CN 201210556955A CN 103058153 B CN103058153 B CN 103058153B
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Abstract
The invention discloses a nitrogen preparation recycle system and a control method thereof. In the nitrogen preparation recycle system and the control method of the nitrogen preparation recycle system, a first pressure detector is arranged on an air-out pipeline of a nitrogen reservoir and used for detecting nitrogen pressure in the air-out pipeline of the nitrogen reservoir, a load controlling valve is arranged on an air outlet of a compressed air reservoir and used for adjusting air-out flow of the compressed air reservoir, the nitrogen preparation recycle system is provided with a load controller which is respectively connected with the first pressure detector and the load controlling valve, opening of the load controlling valve is adjusted according to the nitrogen pressure detected by the first pressure detector, accordingly when the nitrogen is overproduced, the nitrogen pressure detected by the first pressure detector is great, the opening of the load controlling valve is reduced through the load controller (the compressed air which goes into a nitrogen preparation device is reduced) to reduce nitrogen production, so that waste of energy is avoided, and system operating cost is reduced. Therefore, the nitrogen preparation recycle system and the control method of the nitrogen preparation recycle system resolve the problems of the prior art.
Description
Technical field
The application relates to production control technical field, relates in particular to a kind of nitrogen and prepares recovery system and control method thereof.
Background technology
Industrial nitrogen adopts the modes such as pressure-variable adsorption to be isolated airborne oxygen and nitrogen conventionally.The technical process that existing industrial nitrogen is prepared recovery system is: compressed air reservoir will be sent into nitrogen preparing device after air compressing; Nitrogen preparing device makes nitrogen by modes such as pressure-variable adsorptions, sends into successively nitrogen storage storage, low-pressure nitrogen holder; The different needs that use equipment according to nitrogen, low-pressure nitrogen holder directly offers nitrogen use equipment, or, first after topping-up pump supercharging, send into high pressure nitrogen holder, then offer use equipment; The nitrogen that contains moisture that use equipment is discharged is sent into successively nitrogen recycling storage hydathode, nitrogen cooler, refrigerating apparatus and nitrogen air-return water separator and is reclaimed after the purifying treatment such as draining, regeneration deoxygenation, again supplies with nitrogen use equipment and uses.
But realizing in process of the present invention, applicant finds, existing nitrogen is prepared the nitrogen preparation amount of recovery system and is failed to be well controlled, and often occurs the excessive condition of production of nitrogen, causes the waste of the energy, has increased systematic running cost use.
Summary of the invention
In view of this, the application's object is to provide a kind of nitrogen to prepare recovery system and control method thereof, prepares to solve existing nitrogen the problem that recovery system is prone to the excessive condition of production, causes energy dissipation.
For achieving the above object, the application provides following technical scheme:
A kind of nitrogen is prepared recovery system control method, and described system comprises prepares unit and recovery unit, and the described unit of preparing comprises compressed air reservoir, nitrogen preparing device, nitrogen storage storage and low-pressure nitrogen holder, and described method comprises:
Detect the nitrogen pressure in described nitrogen storage storage outlet pipe, using the nitrogen pressure in described nitrogen storage storage outlet pipe as the first pressure;
Regulate the airshed that of described compressed air reservoir according to described the first pressure.
Preferably, the air outlet of described compressed air reservoir is provided with load control valve, for regulating the airshed that of described compressed air reservoir;
The described airshed that goes out that regulates described compressed air reservoir according to described the first pressure, comprising:
In the time that described the first pressure is greater than preset pressure, reduce the aperture of load control valve; In the time that described the first pressure is less than preset pressure, increase the aperture of described load control valve; Described load control valve is arranged at the air outlet of described compressed air reservoir.
Preferably, the described unit of preparing also comprises high pressure nitrogen holder;
Described method also comprises:
Detect the nitrogen pressure in described high pressure nitrogen holder outlet pipe, using the nitrogen pressure in described high pressure nitrogen holder outlet pipe as the 3rd pressure;
Regulate the supercharging multiple of described increase pump according to described the 3rd pressure.
Preferably, described nitrogen preparing device comprises the first nitrogen preparing device and the second nitrogen preparing device; The working order of described the first nitrogen preparing device and the second nitrogen preparing device is contrary; Described working order comprises prepares state and reproduced state;
Described method also comprises:
Detect nitrogen gas purity and nitrogen flow in described nitrogen storage storage intake ducting, and using the nitrogen gas purity in described nitrogen storage storage intake ducting as the first nitrogen gas purity;
In the time that described nitrogen flow is greater than preset flow and/or described the first nitrogen gas purity and is less than the first default purity, change the working order of described the first nitrogen preparing device and the second nitrogen preparing device, carry out regenerating molecular sieve in reproduced state person.
Preferably, described recovery unit comprises that nitrogen recycling stores hydathode, cooling and refrigerating apparatus, nitrogen air-return water separator and nitrogen recycling treater; The inlet mouth of described nitrogen recycling treater is connected with the air outlet of described nitrogen air-return water separator; The air outlet of described nitrogen recycling treater is connected to the inlet mouth of described high pressure nitrogen holder by return-air topping-up pump;
Described method also comprises:
Detect the nitrogen pressure in described nitrogen recycling treater, and nitrogen pressure in described nitrogen recycling treater is as the 4th pressure;
Regulate the supercharging multiple of described return-air topping-up pump according to described the 4th pressure;
And/or,
Detect the nitrogen gas purity in described nitrogen recycling treater outlet pipe, and using the nitrogen gas purity in described nitrogen recycling treater outlet pipe as the second nitrogen gas purity;
In the time that described the second nitrogen gas purity is less than the second default purity, described nitrogen recycling treater is carried out to regenerating molecular sieve.
A kind of nitrogen is prepared recovery system, comprise and prepare unit and recovery unit, the described unit of preparing comprises compressed air reservoir, nitrogen preparing device, nitrogen storage storage and low-pressure nitrogen holder, described nitrogen storage storage outlet pipe is provided with the first pressure detecting instrument, for detection of the nitrogen pressure in described nitrogen storage storage outlet pipe;
The air outlet of described compressed air reservoir is provided with load control valve, for regulating the airshed that of described compressed air reservoir;
Described system also comprises load governor, for the nitrogen pressure detecting according to described the first pressure detecting instrument, regulates the aperture of described load control valve.
Preferably, the air outlet of described compressed air reservoir is provided with load control valve, for regulating the airshed that of described compressed air reservoir;
When the nitrogen pressure detecting when described the first pressure detecting instrument is greater than preset pressure, the aperture of load control valve reduces described in described load governor control; When the nitrogen pressure detecting when described the first pressure detecting instrument is less than preset pressure, the aperture of load control valve increases described in described load governor control.
Preferably, the described unit of preparing also comprises high pressure nitrogen holder and high pressure controller;
The inlet mouth of described high pressure nitrogen holder is connected with the air outlet of low-pressure nitrogen holder by topping-up pump; The air outlet access nitrogen of described high pressure nitrogen holder uses equipment;
Described high pressure nitrogen holder outlet pipe is provided with the 3rd pressure detecting instrument, for detection of the nitrogen pressure in described high pressure nitrogen holder outlet pipe;
Described high pressure controller is connected with described the 3rd pressure detecting instrument and topping-up pump respectively, for the nitrogen pressure detecting according to described the 3rd pressure detecting instrument, regulates the supercharging multiple of described increase pump.
Preferably, described nitrogen preparing device comprises the first nitrogen preparing device and the second nitrogen preparing device; The working order of described the first nitrogen preparing device and the second nitrogen preparing device is contrary; Described working order comprises prepares state and reproduced state;
Described nitrogen storage storage intake ducting is provided with nitrogen flow detector and the first nitrogen gas purity detector; Described nitrogen flow detector is for detection of nitrogen flow in described nitrogen storage storage intake ducting; Described the first nitrogen gas purity detector is for detection of the nitrogen gas purity in described nitrogen storage storage intake ducting;
Described system also comprises refresh controller; Described refresh controller is connected with nitrogen flow detector and the first nitrogen gas purity detector respectively, be greater than for the nitrogen flow detecting when described nitrogen flow detector nitrogen gas purity that preset flow and/or described the first nitrogen gas purity detector detect and be less than first while presetting purity, change the working order of described the first nitrogen preparing device and the second nitrogen preparing device, carry out regenerating molecular sieve.
Preferably, described recovery unit comprises that nitrogen recycling stores hydathode, cooling and refrigerating apparatus, nitrogen air-return water separator and nitrogen recycling treater; The inlet mouth of described nitrogen recycling treater is connected with the air outlet of described nitrogen air-return water separator; The air outlet of described nitrogen recycling treater is connected to the inlet mouth of described high pressure nitrogen holder by return-air topping-up pump;
Described nitrogen recycling treater is provided with the 4th pressure detecting instrument, for detection of the nitrogen pressure in described nitrogen recycling treater;
Described system also comprises back pressure controller; Described back pressure controller is connected with the 4th pressure detecting instrument and return-air topping-up pump respectively, for the nitrogen pressure detecting according to described the 4th pressure detecting instrument, regulates the supercharging multiple of described return-air topping-up pump;
And/or,
Described nitrogen recycling treater outlet pipe is provided with the second nitrogen gas purity detector, for detection of the nitrogen gas purity in described nitrogen recycling treater outlet pipe; The recoil mouth of described nitrogen recycling treater is connected to nitrogen by recoil valve and uses equipment, and the venting port of described nitrogen recycling treater is provided with vent valve; On pipeline between nitrogen recycling treater and return-air topping-up pump, be provided with air outlet valve,
Described system also comprises return-air control of purity device; Described return-air control of purity device is connected with described the second nitrogen gas purity detector, air outlet valve, recoil valve and vent valve respectively, while being less than the second default purity for the nitrogen gas purity detecting when described the second nitrogen gas purity detector, open described air outlet valve, recoil valve and vent valve, described nitrogen recycling treater is carried out to regenerating molecular sieve.
Can find out from above-mentioned technical scheme, the application is by arranging the first pressure detecting instrument P1 that detects nitrogen pressure in nitrogen storage storage outlet pipe, with regulate compressed air reservoir to go out the load control valve J1 of airshed, and the nitrogen pressure being detected according to the first pressure detecting instrument P1 by load governor, the aperture of adjusting load control valve J1; Thereby it is excessive to work as nitrogen production, when the first pressure detecting instrument P1 detects nitrogen pressure is bigger than normal, reduce the aperture (reducing the compressed-air actuated amount entering in nitrogen preparing device) of load control valve J1 by load governor, reduce nitrogen production amount, avoid the waste of the energy, reduced systematic running cost use.Therefore, the application has solved the problem of prior art.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiment of the application, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The nitrogen that Fig. 1 provides for the embodiment of the present application one is prepared recovery system structural representation;
The nitrogen preparing device load pilot circuit schematic diagram that Fig. 2 provides for the embodiment of the present application;
The low-pressure nitrogen reservoir pressure pilot circuit schematic diagram that Fig. 3 provides for the embodiment of the present application;
The nitrogen that Fig. 4 provides for the embodiment of the present application two is prepared recovery system structural representation;
The nitrogen that Fig. 5 provides for the embodiment of the present application two is prepared recovery system pilot circuit figure;
The high pressure nitrogen reservoir pressure pilot circuit schematic diagram that Fig. 6 provides for the embodiment of the present application;
The nitrogen that Fig. 7 provides for the embodiment of the present application three is prepared recovery system structural representation;
The nitrogen recycling treater pressure control circuit schematic diagram that Fig. 8 provides for the embodiment of the present application;
The nitrogen that Fig. 9 provides for the embodiment of the present application three is prepared recovery system pilot circuit figure;
The nitrogen recycling that Figure 10 provides for the embodiment of the present application stores hydathode draining pilot circuit schematic diagram;
The nitrogen air-return water separator draining pilot circuit schematic diagram that Figure 11 provides for the embodiment of the present application;
The nitrogen that Figure 12 provides for the embodiment of the present application four is prepared recovery system control method schema;
The nitrogen that Figure 13 provides for the embodiment of the present application is prepared recovery system control method schema;
The nitrogen that Figure 14 provides for the embodiment of the present application is prepared recovery system control method schema;
The nitrogen that Figure 15 provides for the embodiment of the present application five is prepared recovery system control method schema;
The nitrogen that Figure 16 provides for the embodiment of the present application six is prepared recovery system control method schema.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiment.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the application's protection.
The embodiment of the present application discloses a kind of nitrogen and has prepared recovery system and control method thereof, prepares to solve existing nitrogen the problem that recovery system is prone to the excessive condition of production, causes energy dissipation.
With reference to Fig. 1, the nitrogen that the embodiment of the present application one provides is prepared recovery system, by preparing unit and recovery unit forms.Prepare unit for the preparation of nitrogen, supply with nitrogen and use equipment; The impure nitrogen that recovery unit is discharged for reclaiming nitrogen use equipment.Wherein preparing unit comprises: compressed air reservoir 1, nitrogen preparing device 2, nitrogen storage storage 3, low-pressure nitrogen holder 4 and load governor 101.Wherein, the air outlet of compressed air reservoir 1 is connected with the inlet mouth of nitrogen preparing device 2; The air outlet of nitrogen preparing device 2 is connected with the inlet mouth of nitrogen storage storage 3; The air outlet of nitrogen storage storage 3 is connected with the inlet mouth of low-pressure nitrogen holder 4; The air outlet of low-pressure nitrogen holder 4 is connected to nitrogen and uses equipment; Nitrogen uses equipment to be connected with recovery unit.
The outlet pipe of nitrogen storage storage 3, nitrogen storage storage 3 is provided with the first pressure detecting instrument P1 with the connecting tube of low-pressure nitrogen holder 4, for detection of the nitrogen pressure in nitrogen storage storage 3 outlet pipes.
The air outlet of compressed air reservoir 1 is provided with load control valve J1, for regulating the airshed that of compressed air reservoir 1.
Load governor 101 is connected (as shown in Figure 2 with the first pressure detecting instrument P1 and load control valve J1 respectively, load governor 101 adopts load control instruments WP-S805), for the nitrogen pressure detecting according to the first pressure detecting instrument P1, regulate the aperture of load control valve J1.When the nitrogen pressure that detects as the first pressure detecting instrument P1 is bigger than normal, illustrate that nitrogen production is excessive, load governor 101 control overhead control valve J1 reduce aperture, reduce the compressed-air actuated amount entering in nitrogen preparing device 1, thereby reduce nitrogen production amount; Otherwise, when the nitrogen pressure that detects as the first pressure detecting instrument P1 is less than normal, nitrogen production quantity not sufficient is described, load governor 101 control overhead control valve J1 increase apertures, increase the compressed-air actuated amount entering in nitrogen preparing device 1, thereby increase nitrogen production amount.
From said system structure, the embodiment of the present application is by arranging the first pressure detecting instrument P1 that detects nitrogen pressure in nitrogen storage storage outlet pipe, with regulate compressed air reservoir to go out the load control valve J1 of airshed, and the nitrogen pressure being detected according to the first pressure detecting instrument P1 by load governor 101, the aperture of adjusting load control valve J1; Thereby it is excessive to work as nitrogen production, when the first pressure detecting instrument P1 detects nitrogen pressure is bigger than normal, reduce the aperture (reducing the compressed-air actuated amount entering in nitrogen preparing device 1) of load control valve J1 by load governor 101, reduce nitrogen production amount, avoid the waste of the energy, reduced systematic running cost use.Therefore, the embodiment of the present application has solved the problem of prior art.
Concrete, the nitrogen pressure that in above-described embodiment, load governor 101 detects according to the first pressure detecting instrument P1, the mode of the aperture of adjusting load control valve J1 is varied.
For example, can be when normal nitrogen production amount, the nitrogen pressure in nitrogen storage storage outlet pipe is as preset pressure.When the nitrogen pressure detecting as the first pressure detecting instrument P1 is greater than this preset pressure, load governor 101 generates aperture and reduces control signal, and with control overhead control valve, J1 reduces aperture; When the nitrogen pressure detecting as the first pressure detecting instrument P1 is less than this preset pressure, load governor 101 generates aperture and increases control signal, increases aperture with control overhead control valve J1.
And for example, calculate in advance nitrogen production amount when normal, the product K of the nitrogen pressure in nitrogen storage storage outlet pipe and the aperture of load control valve J1, ratio K/P of the nitrogen pressure P that load governor 101 calculating Ks and the first pressure detecting instrument P1 detect, generate corresponding control signal, the regulation of control overhead control valve J1 is to K/P.
Further, still with reference to Fig. 1, in other embodiment of the application, the air outlet of above-described embodiment mesolow nitrogen storage storage 4 is also provided with the second pressure detecting instrument P2 and low-pressure control valve Y2, and the unit of preparing that nitrogen is prepared recovery system also comprises pressure controller 102.
Wherein, the second pressure detecting instrument P2 is for detection of the nitrogen pressure of low-pressure nitrogen holder 4 air outlets; Low-pressure control valve Y2 is for regulating the airshed that of low-pressure nitrogen holder 4.Low pressure controller 102 is connected (as shown in Figure 3 with the second pressure detecting instrument P2 and low-pressure control valve Y2 respectively, low pressure controller 102 adopts load control instruments WP-S805), for the nitrogen pressure detecting according to the second pressure detecting instrument P2, regulate the aperture of low-pressure control valve Y2, concrete regulative mode can be with reference to load governor 101 regulative mode to load control valve J1, do not repeat them here.
When the nitrogen pressure that detects as the second pressure detecting instrument P2 is bigger than normal, low pressure controller 102 is controlled low-pressure control valve Y2 and is reduced aperture, thereby reduce to enter nitrogen flow and the pressure of nitrogen use equipment, nitrogen is fully utilized in nitrogen use equipment, further avoids energy dissipation, reduce systematic running cost use.
With reference to Fig. 4, the nitrogen that the embodiment of the present application two provides is prepared recovery system, by preparing unit and recovery unit forms.Prepare unit for the preparation of nitrogen, supply with nitrogen and use equipment; The impure nitrogen that recovery unit is discharged for reclaiming nitrogen use equipment.Wherein preparing unit comprises: compressed air reservoir 1, nitrogen preparing device 2, nitrogen storage storage 3, low-pressure nitrogen holder 4, load governor 101 and refresh controller 201.Wherein, the air outlet of compressed air reservoir 1 is connected with the inlet mouth of nitrogen preparing device 2; The air outlet of nitrogen preparing device 2 is connected with the inlet mouth of nitrogen storage storage 3; The air outlet of nitrogen storage storage 3 is connected with the inlet mouth of low-pressure nitrogen holder 4; The air outlet of low-pressure nitrogen holder 4 is connected to nitrogen and uses equipment; Nitrogen uses equipment to be connected with recovery unit.
The outlet pipe of nitrogen storage storage 3, nitrogen storage storage 3 is provided with the first pressure detecting instrument P1 with the connecting tube of low-pressure nitrogen holder 4, for detection of the nitrogen pressure in nitrogen storage storage 3 outlet pipes.The air outlet of compressed air reservoir 1 is provided with load control valve J1, for regulating the airshed that of compressed air reservoir 1.Load governor 101 is connected with the first pressure detecting instrument P1 and load control valve J1 respectively, for the nitrogen pressure detecting according to the first pressure detecting instrument P1, regulates the aperture of load control valve J1.
Nitrogen preparing device 2 comprises 1 first nitrogen preparing device 21 and the second nitrogen preparing device 22.The working order of nitrogen preparing device comprises prepares state and reproduced state, and the first nitrogen preparing device 21 and the second nitrogen preparing device 22 alternations are in the described state of preparing.
Nitrogen storage storage 3 intake ductings are provided with nitrogen flow detector L1 and the first nitrogen gas purity detector N1.Nitrogen flow detector L1 is for detection of nitrogen flow in nitrogen storage storage 3 intake ductings; The first nitrogen gas purity detector N1 is for detection of the nitrogen gas purity in nitrogen storage storage 3 intake ductings.
When refresh controller 201 is greater than nitrogen gas purity that preset flow or the first nitrogen gas purity detector N1 detect and is less than the first default purity for the nitrogen flow detecting as nitrogen flow detector L1, change the working order of the first nitrogen preparing device 21 and the second nitrogen preparing device 22.The flow of the nitrogen that for example the first nitrogen preparing device 21 makes is greater than preset flow or purity is less than the first default purity, refresh controller 201 is controlled the second nitrogen preparing device 22 and is entered and prepare state to prepare nitrogen, control the first nitrogen preparing device 21 simultaneously and enter reproduced state, carry out regenerating molecular sieve deoxygenation, prepare for again preparing nitrogen.
Described in above-described embodiment, the pilot circuit of system as shown in Figure 5.With reference to Fig. 4 and Fig. 5, the working process of system is as follows described in above-described embodiment.
In the time that system puts into operation, the system of pressing starts knob SB1, and the first nitrogen preparing device 21 starting relay 1K obtain electric and pass through 1K
1self-locking, start-up point 1K
3closure, load control valve J1 opens, and 1# intake valve DJ1 opens, and 1# air outlet valve DC1 opens, start-up point 1K
5closure, leaving air control valve C1 opens, and the first nitrogen preparing device 21 enters prepares state, starts to prepare nitrogen.The first nitrogen gas purity detector N1 detects the nitrogen gas purity in nitrogen storage storage 3 intake ductings, and nitrogen flow detector L1 starts to detect nitrogen flow in nitrogen storage storage 3 intake ductings.Judge when refresh controller 201 nitrogen gas purity that the first nitrogen gas purity detector N1 detects and do not reach default purity, or, when the nitrogen flow that nitrogen flow detector L1 detects reaches preset flow, refresh controller 201 control the first/the second preparing device switching relay 3K obtain electric, the first nitrogen preparing device 21 regenerated signal 3K
1closure, the first recovery time controller 1KT and the second nitrogen preparing device delay controller 2KT obtain electric, the first nitrogen preparing device 21 silence signal 1KT
2disconnect, the first nitrogen preparing device 21 starting relay 1K dead electricity, 1# intake valve DJ1,1# air outlet valve DC1 close, normal battle of the 1KT of the first recovery time controller 1KT
1after closed, time delay disconnects, 1 2# regeneration control valve DT1 open, 1# regeneration air throttle DP1 and DP2 open, the first nitrogen preparing device 21 enters reproduced state, regeneration starts.Through normal battle of the 1KT of the first recovery time controller 1KT
1after closed, delay adjustments disconnects, 1 2# regeneration control valve DT1,1# regeneration air throttle DP1 and DP2 close, 1# exhaust-valve DPK1 opens, and discharges the oxygen that the regenerating molecular sieve of the first nitrogen preparing device 21 discharges.
The second nitrogen preparing device 22 delay controller 2KT
1time closing, the second nitrogen preparing device 22 starting relay 2K obtain electric, and pass through 2K
1self-locking, start-up point 2K
3closure, load control valve J1 opens, and 2# intake valve DJ2 opens, and 2# air outlet valve DC2 opens, start-up point 2K
5closure, leaving air control valve C1 opens, and the second nitrogen preparing device 22 enters prepares state, starts to prepare nitrogen.The first nitrogen gas purity detector N1 detects the nitrogen gas purity in nitrogen storage storage 3 intake ductings, and nitrogen flow detector L1 starts to detect nitrogen flow in nitrogen storage storage 3 intake ductings.Judge when refresh controller 201 nitrogen gas purity that the first nitrogen gas purity detector N1 detects and do not reach default purity, or, when the nitrogen flow that nitrogen flow detector L1 detects reaches preset flow, refresh controller 201 control the second/the first preparing device switching relay 4K obtain electric, the second nitrogen preparing device 22 regenerated signal 4K
1closure, the second recovery time controller 3KT and the first nitrogen preparing device delay controller 4KT obtain electric, the second nitrogen preparing device 22 silence signal 3KT
2disconnect, the second nitrogen preparing device 22 starting relay 2K dead electricity, 2# intake valve DJ2,2# air outlet valve DC2,1# exhaust-valve DPK1 close, normal battle of the 3KT of the second recovery time controller 3KT
1after closed, time delay disconnects, 1 2# regeneration control valve DT1 open, 2# regeneration air throttle DP3 and DP4 open, the second nitrogen preparing device 22 enters reproduced state, regeneration starts.Through normal battle of the 3KT of the second recovery time controller 3KT
1after closed, delay adjustments disconnects, 1 2# regeneration control valve DT1,2# regeneration air throttle DP3 and DP4 close, 2# exhaust-valve DPK2 opens, and discharges the oxygen that the regenerating molecular sieve of the second nitrogen preparing device 22 discharges.
The first nitrogen preparing device 21 is prepared delay controller 4KT
1time closing, the first nitrogen preparing device 21 starting relay 1K obtain the electric 1K of passing through
1self-locking, start-up point 1K
3closed.So circulation, makes the first nitrogen preparing device 21 and the second nitrogen preparing device 22 alternations.
From said structure and working process, the nitrogen that the embodiment of the present application provides is prepared recovery system, on the one hand, the nitrogen pressure detecting according to the first pressure detecting instrument P1 by load governor 101, regulate the aperture of load control valve J1, thereby solve the excessive energy dissipation causing of nitrogen production, high problem for systematic running cost.On the other hand, nitrogen preparing device is made up of the first nitrogen preparing device and the second nitrogen preparing device, and the nitrogen gas purity making when the first nitrogen preparing device does not meet the demands, or produces when excessive, control the first nitrogen preparing device and enter reproduced state, the second nitrogen preparing device enters prepares state; The first nitrogen preparing device, through regenerating molecular sieve deoxygenation, is prepared for again preparing nitrogen; The second nitrogen preparing device has just entered while preparing state, and nitrogen production amount is less, has relaxed the excessive situation of nitrogen production.Therefore, the embodiment of the present application has solved prior art nitrogen gas purity without guarantee, and causes the problem of energy dissipation because nitrogen production is excessive.
For improving the security of system, nitrogen is prepared recovery system and also can be comprised auxiliary nitrogen preparing device described in above-described embodiment.The inlet mouth of this auxiliary nitrogen preparing device is connected with the air outlet of compressed air reservoir 1 by auxiliary burden control valve, the air outlet of auxiliary nitrogen preparing device is connected in series nitrogen gas purity detector, nitrogen flow detector and leaving air control valve successively, and is finally connected to the inlet mouth of nitrogen storage storage 3.The internal structure of this auxiliary nitrogen preparing device and mode of operation are identical with nitrogen preparing device 2, do not repeat them here.
Further, for meeting under different condition, nitrogen uses the pressure of equipment required nitrogen, and in other embodiment of the application, the nitrogen described in above-described embodiment is prepared recovery system and also comprised high pressure nitrogen holder 5 and high pressure controller 103.The inlet mouth of high pressure nitrogen holder 5 is connected with the air outlet of low-pressure nitrogen holder 4 by topping-up pump B1; The air outlet access nitrogen of high pressure nitrogen holder 5 uses equipment, for nitrogen use equipment provides the nitrogen that pressure is higher.
The outlet pipe (being the connecting tube that high pressure nitrogen holder 5 and above-mentioned nitrogen use equipment) of high pressure nitrogen holder 5 is provided with the 3rd pressure detecting instrument P3, for detection of the nitrogen pressure in high pressure nitrogen holder 5 outlet pipes, high pressure nitrogen holder 5 is sent into the nitrogen pressure in nitrogen use equipment.
High pressure controller 103 is connected (as shown in Figure 6 with the 3rd pressure detecting instrument P3 and topping-up pump B1 respectively, high pressure controller 103 adopts load control instruments WP-S805), for the nitrogen pressure detecting according to the 3rd pressure detecting instrument P3, regulate the supercharging multiple of above-mentioned increase pump B1: when the nitrogen pressure that detects as the 3rd pressure detecting instrument P3 is bigger than normal, high pressure controller 103 generates corresponding steering order, control increase pump B1 and reduce supercharging multiple, send into the nitrogen pressure in nitrogen use equipment thereby reduce high pressure nitrogen holder 5; Otherwise when the nitrogen pressure that detects as the 3rd pressure detecting instrument P3 is less than normal, high pressure controller 103 generates corresponding steering order, controlling increases pump B1 and increases supercharging multiple, thereby increases the nitrogen pressure that high pressure nitrogen holder 5 is sent in nitrogen use equipment.High pressure controller 103 regulate increase the concrete mode of pump B1 also can be with reference to load governor 101 regulative mode to load control valve J1, do not repeat them here.
With reference to Fig. 7, the nitrogen that the embodiment of the present application three provides is prepared recovery system, by preparing unit and recovery unit forms.Prepare unit for the preparation of nitrogen, supply with nitrogen and use equipment; The impure nitrogen that recovery unit is discharged for reclaiming nitrogen use equipment.
Preparing unit comprises: compressed air reservoir, nitrogen preparing device, nitrogen storage storage, low-pressure nitrogen holder, high pressure nitrogen holder 5 and load governor.Wherein, the air outlet of compressed air reservoir is connected with the inlet mouth of nitrogen preparing device; The air outlet of nitrogen preparing device is connected with the inlet mouth of nitrogen storage storage; The air outlet of nitrogen storage storage is connected with the inlet mouth of low-pressure nitrogen holder; The air outlet of low-pressure nitrogen holder is connected with the inlet mouth of high pressure nitrogen holder 5 by topping-up pump, and the air outlet of low-pressure nitrogen holder is also connected to nitrogen use equipment; The air outlet of high pressure nitrogen holder 5 is also connected to nitrogen and uses equipment.
The outlet pipe of nitrogen storage storage, the connecting tube of nitrogen storage storage and low-pressure nitrogen holder is provided with the first pressure detecting instrument P1, for detection of the nitrogen pressure in nitrogen storage storage outlet pipe.
The air outlet of compressed air reservoir is provided with load control valve J1, for regulating the airshed that of compressed air reservoir.
Load governor is connected with the first pressure detecting instrument P1 and load control valve J1 respectively, for the nitrogen pressure detecting according to the first pressure detecting instrument P1, regulates the aperture of load control valve J1, reaches the object of Controlling System nitrogen production amount.
Recovery unit comprises: nitrogen recycling stores hydathode 6, cooling and refrigerating apparatus 7, nitrogen air-return water separator 8, nitrogen recycling treater 9, back pressure controller 104 and return-air control of purity device 105.Wherein, nitrogen recycling stores inlet mouth and the nitrogen use equipment connection of hydathode 6; The air outlet that nitrogen recycling stores hydathode 6 is connected with inlet mouth cooling and refrigerating apparatus 7; Air outlet cooling and refrigerating apparatus 7 is connected with the inlet mouth of nitrogen air-return water separator 8; The air outlet of nitrogen air-return water separator 8 is connected with the inlet mouth of nitrogen recycling treater 9; The air outlet of nitrogen recycling treater 9 is connected to the inlet mouth of high pressure nitrogen holder 5 by return-air topping-up pump B3.On nitrogen recycling treater 9, be provided with the 4th pressure detecting instrument P4 that detects nitrogen recycling treater 9 interior nitrogen pressures, its recoil mouthful is connected to nitrogen by recoil valve Z1 and uses equipment, and its venting port is provided with vent valve Z2; On pipeline between nitrogen recycling treater 9 and return-air topping-up pump B3, be provided with air outlet valve H1, and detect the second nitrogen gas purity detector N2 of the nitrogen gas purity in nitrogen recycling treater 9 outlet pipes.
Back pressure controller 104 is connected (as shown in Figure 8 with the 4th pressure detecting instrument P4 and return-air topping-up pump B3 respectively, back pressure controller 104 adopts load control instruments WP-S805), for the nitrogen pressure detecting according to the 4th pressure detecting instrument P4, regulate the supercharging multiple of return-air topping-up pump B3: when the nitrogen pressure that detects as the 4th pressure detecting instrument P4 is bigger than normal, back pressure controller 104 generates corresponding steering order, control return-air increase pump B3 and reduce supercharging multiple, thereby reduce nitrogen recycling treater 9 and send into the nitrogen pressure in high pressure nitrogen holder 5, reducing return-air increases the working load of pump B3, and then minimizing energy dissipation, otherwise, when the nitrogen pressure that detects as the 4th pressure detecting instrument P4 is less than normal, back pressure controller 104 generates corresponding steering order, control return-air and increase pump B3 increase supercharging multiple, thereby increase the nitrogen pressure that nitrogen recycling treater 9 is sent in high pressure nitrogen holder 5, meet nitrogen and use the pressure requirement of equipment to nitrogen.Back pressure controller 104 regulate concrete mode that return-air increases pump B3 also can be with reference to load governor 101 regulative mode to load control valve J1, do not repeat them here.
Return-air control of purity device 105 increases pump B3 recoil valve Z1 with air outlet valve H1, the second nitrogen gas purity detector N2, return-air respectively and vent valve Z2 is connected, while being less than the second default purity for the nitrogen gas purity detecting as the second nitrogen gas purity detector N2, stop carrying to high pressure nitrogen holder the nitrogen reclaiming, and trigger nitrogen recycling treater 9 and carry out regenerating molecular sieve deoxygenation; Its pilot circuit as shown in Figure 9.
With reference to Fig. 7 and Fig. 9, the treating processes of the nitrogen that said system reclaims nitrogen recycling treater 9 is as follows.In the time that return-air control of purity device 105 judges that the second nitrogen gas purity detector N2 detects that nitrogen gas purity in nitrogen recycling treater 9 does not reach the second default purity, nitrogen recycling treater 9 enters reproduced state: processing controls rly. 11K obtains electric, passes through 11K
1self-locking, processing control signals 11K
3closure, time controller 9KT, 10KT obtain electric, nitrogen recycling treater 9 outlet valve control line 9KT
2disconnect, the rly. 10K dead electricity of giving vent to anger of starting shooting, air outlet valve H1 closes, and return-air topping-up pump B3 stops, and the treatment time is controlled 9KT
1after closed, time delay disconnects, and recoil valve Z1 and vent valve Z2 open, and purity is discharged by vent valve Z2 lower than the nitrogen of the second default purity; According to time controller 9KT setting-up time, recoil valve Z1 and vent valve Z2 close, simultaneously the Regeneration control end signal 10KT of time controller 10KT
2time delay disconnects, processing controls rly. 11K dead electricity, regeneration ending; System recoveries control signal 11K
2normally closed closed, start give vent to anger rly. 10K obtain electric, and self-locking, the start control signal 10K that gives vent to anger
3closure, air outlet valve H1 opens, and return-air topping-up pump B3 starts, and nitrogen recycling treater 9 restarts absorption and reclaims the oxygen in nitrogen.
By above-mentioned treating processes, the embodiment of the present application has realized the processing such as deoxygenation that dewater to reclaiming nitrogen, obtains the nitrogen that purity is greater than the second default purity, after supercharging, can again send into high pressure nitrogen holder 5, and then is used equipment utilization by nitrogen; When the nitrogen gas purity obtaining when nitrogen recycling treater is less than the second default purity, the molecular sieve that nitrogen recycling treater is described is saturated, adsorption of oxygen again, by its regenerating molecular sieve of controller, makes it again possess the function of the oxygen in absorption recovery nitrogen.Therefore, the embodiment of the present application has further been avoided energy dissipation, has reduced systematic running cost use.
For improving security of system, can be a return-air topping-up pump B3 additional mechanical supercharging pump B4 in parallel in said system; As the topping-up pump for subsequent use of return-air topping-up pump B3, the mode of connection of additional mechanical supercharging pump B4, working process are identical with return-air topping-up pump B3.
Further, still with reference to Fig. 7, in other embodiment of the application, the nitrogen of above-described embodiment is prepared recovery system and is also comprised first row water controller 301 and second row water controller 302.
Nitrogen recycling stores hydathode 6 and is provided with the first liquidometer F1 and first row water valve S1; The first liquidometer F1 stores the liquid level of hydathode 6 for detection of nitrogen recycling; First row water valve S1 stores the drain discharge of hydathode 6 for controlling nitrogen recycling.
First row water controller 301 is connected (as shown in figure 10) with the first liquidometer F1 and first row water valve S1 respectively, for the liquid level detecting according to the first liquidometer F1, regulate first row water valve S1 aperture, make nitrogen recycling store hydathode 6 isolated moisture from nitrogen and discharge in time.
Nitrogen air-return water separator 8 is provided with the second liquidometer F2 and second row water valve S2; The second liquidometer F2 is for detection of the liquid level of nitrogen air-return water separator 8; Second row water valve S2 is for controlling the drain discharge of nitrogen air-return water separator 8.
Second row water controller 302 is connected (as shown in figure 11) with the second liquidometer F2 and second row water valve S2 respectively, for the liquid level detecting according to the second liquidometer F2, regulate second row water valve S2 aperture, nitrogen air-return water separator 8 isolated moisture from nitrogen is discharged in time.
Embodiment is corresponding with said system, and the embodiment of the present application four provides a kind of nitrogen to prepare recovery system control method.
This system is by preparing unit and recovery unit forms.Prepare unit for the preparation of nitrogen, supply with nitrogen and use equipment; The impure nitrogen that recovery unit is discharged for reclaiming nitrogen use equipment.Wherein preparing unit comprises: compressed air reservoir, nitrogen preparing device, nitrogen storage storage and low-pressure nitrogen holder.Wherein, the air outlet of compressed air reservoir is connected with the inlet mouth of nitrogen preparing device; The air outlet of nitrogen preparing device is connected with the inlet mouth of nitrogen storage storage; The air outlet of nitrogen storage storage is connected with the inlet mouth of low-pressure nitrogen holder; The air outlet of low-pressure nitrogen holder is connected to nitrogen and uses equipment; Nitrogen uses equipment to be connected with recovery unit.
As shown in figure 12, the method comprising the steps of:
S1: detect the nitrogen pressure in above-mentioned nitrogen storage storage outlet pipe, set it as the first pressure;
S2: the airshed that goes out that regulates compressed air reservoir according to above-mentioned the first pressure.
When above-mentioned the first pressure is time bigger than normal, illustrate that nitrogen production is excessive, reduce the airshed that of compressed air reservoir, reduce the compressed-air actuated amount entering in nitrogen preparing device, thereby reduce nitrogen production amount; Otherwise, when the first pressure is time less than normal, nitrogen production quantity not sufficient is described, increase the airshed that of compressed air reservoir, increase the compressed-air actuated amount entering in nitrogen preparing device, thereby increase nitrogen production amount.
From aforesaid method step, the embodiment of the present application is by detecting the first pressure (being nitrogen pressure in nitrogen storage storage outlet pipe), and according to the airshed that goes out of this first pressure adjusting compressed air reservoir, thereby excessive when nitrogen production, the first pressure is time bigger than normal, by reducing the airshed that of compressed air reservoir, reduce the compressed-air actuated amount entering in nitrogen preparing device, reduce nitrogen production amount, avoided the waste of the energy, reduced systematic running cost use.Therefore, the embodiment of the present application has solved the problem of prior art.
In other embodiment of the application, in above-described embodiment, the embodiment of step S2 is varied.
For example, can be when normal nitrogen production amount, the nitrogen pressure in nitrogen storage storage outlet pipe is as preset pressure.In the time that the first pressure is greater than this preset pressure, reduce the airshed that of compressed air reservoir; In the time that the first pressure is less than this preset pressure, increase the airshed that of compressed air reservoir.
And for example, calculate in advance nitrogen production amount when normal, the product K that goes out airshed of the nitrogen pressure in nitrogen storage storage outlet pipe and compressed air reservoir, using the ratio K/P of K and the first pressure P as current the suitableeest go out airshed, and regulate compressed air reservoir go out airshed to K/P.
Concrete, can load control valve J1 be set in the air outlet of compressed air reservoir, by regulating the aperture of J1 to regulate the airshed that of compressed air reservoir.
Further, with reference to Figure 13, in other embodiment of the application, above-described embodiment also comprises step:
S3: detect the nitrogen pressure of low-pressure nitrogen holder air outlet, set it as the second pressure;
S4: the airshed that goes out that regulates low-pressure nitrogen holder according to above-mentioned the second pressure.
Concrete, can low-pressure control valve Y2 be set in the air outlet of low-pressure nitrogen holder.When the second pressure is time bigger than normal, reduce the aperture of Y2; When the second pressure is time less than normal, increase the aperture of Y2.Because the nitrogen pressure of low-pressure nitrogen holder air outlet is when excessive, being easy to cause entering nitrogen uses the nitrogen of equipment too much, thereby cause nitrogen not to be fully utilized, now by reducing the aperture of Y2, thereby reduce the nitrogen flow that enters nitrogen use equipment, nitrogen is fully utilized in nitrogen use equipment, further avoids energy dissipation, reduce systematic running cost use.
Further, the nitrogen that above-described embodiment four provides is prepared in recovery system, and nitrogen preparing device comprises the first nitrogen preparing device and the second nitrogen preparing device; The working order of this first nitrogen preparing device and the second nitrogen preparing device is contrary; Above-mentioned working order comprises running status and halted state.Accordingly, as shown in figure 14, the nitrogen that above-described embodiment four provides is prepared recovery system control method and is also comprised step:
S5: detect nitrogen gas purity and nitrogen flow in nitrogen storage storage intake ducting, and using the nitrogen gas purity in nitrogen storage storage intake ducting as the first nitrogen gas purity;
S6: in the time that above-mentioned nitrogen flow is greater than preset flow and/or the first nitrogen gas purity and is less than the first default purity, change the working order of the first nitrogen preparing device and the second nitrogen preparing device, the deoxygenation of regenerating.
From aforesaid method step, the embodiment of the present application detects nitrogen gas purity and nitrogen flow in nitrogen storage storage intake ducting, the nitrogen gas purity making when the nitrogen preparing device in preparing state (as the first nitrogen preparing device) does not meet the demands, or produce when excessive, control this nitrogen preparing device and enter reproduced state, another nitrogen preparing device enters prepares state; By nitrogen preparing device is carried out to regenerating molecular sieve deoxygenation, prepare for again preparing nitrogen; And another nitrogen preparing device has just entered while preparing state, nitrogen production amount is less, has relaxed the excessive situation of nitrogen production.Therefore, the embodiment of the present application has solved prior art nitrogen gas purity without guarantee, and causes the problem of energy dissipation because nitrogen production is excessive.
The embodiment of the present application five provides a kind of nitrogen to prepare recovery system control method.
Wherein, this system is by preparing unit and recovery unit forms.Prepare unit for the preparation of nitrogen, supply with nitrogen and use equipment; The impure nitrogen that recovery unit is discharged for reclaiming nitrogen use equipment.Wherein preparing unit comprises: compressed air reservoir, nitrogen preparing device, nitrogen storage storage, low-pressure nitrogen holder and high pressure nitrogen holder.Wherein, the air outlet of compressed air reservoir is connected with the inlet mouth of nitrogen preparing device; The air outlet of nitrogen preparing device is connected with the inlet mouth of nitrogen storage storage; The air outlet of nitrogen storage storage is connected with the inlet mouth of low-pressure nitrogen holder, and the air outlet of low-pressure nitrogen holder is connected to nitrogen and uses equipment; The inlet mouth of high pressure nitrogen holder is connected with the air outlet of low-pressure nitrogen holder by topping-up pump B1, and the air outlet access nitrogen of high pressure nitrogen holder uses equipment, for nitrogen use equipment provides the nitrogen that pressure is higher; Nitrogen uses equipment to be connected with recovery unit.
As shown in figure 15, the method comprising the steps of:
S1: detect the nitrogen pressure in above-mentioned nitrogen storage storage outlet pipe, set it as the first pressure;
S2: the airshed that goes out that regulates compressed air reservoir according to above-mentioned the first pressure;
S7: detect the nitrogen pressure in above-mentioned high pressure nitrogen holder outlet pipe, set it as the 3rd pressure;
S8: regulate the supercharging multiple that increases pump B1 according to above-mentioned the 3rd pressure.
From aforesaid method step, the embodiment of the present application regulates the airshed that of compressed air reservoir on the one hand according to the nitrogen pressure in nitrogen storage storage outlet pipe, thereby controls the turnout of nitrogen, avoids excessive production; On the other hand, regulate the supercharging multiple that increases pump B1 according to the nitrogen pressure in high pressure nitrogen holder outlet pipe, prevent from using the nitrogen of equipment excessive because hypertonia causes entering nitrogen the phenomenon that can not be fully utilized, thereby both avoided energy dissipation, reduced again systematic running cost use.
The embodiment of the present application six provides a kind of nitrogen to prepare recovery system control method.
Wherein, this system is by preparing unit and recovery unit forms.Preparing unit comprises: compressed air reservoir, nitrogen preparing device, nitrogen storage storage, low-pressure nitrogen holder and high pressure nitrogen holder, and for the preparation of nitrogen, supply with nitrogen and use equipment; Recovery unit comprises: nitrogen recycling stores hydathode, cooling and refrigerating apparatus, nitrogen air-return water separator and nitrogen recycling treater, the impure nitrogen of discharging for reclaiming nitrogen use equipment.Wherein, inlet mouth and nitrogen that nitrogen recycling stores hydathode use equipment connection, and air outlet is connected with the inlet mouth of cooling and refrigerating apparatus; Air outlet cooling and refrigerating apparatus is connected with the inlet mouth of nitrogen air-return water separator; The air outlet of nitrogen air-return water separator is connected with the inlet mouth of nitrogen recycling treater; The air outlet of nitrogen recycling treater is connected to the inlet mouth of high pressure nitrogen holder by return-air topping-up pump B3.
With reference to Figure 16, the method comprising the steps of:
S1: detect the nitrogen pressure in above-mentioned nitrogen storage storage outlet pipe, set it as the first pressure;
S2: the airshed that goes out that regulates compressed air reservoir according to above-mentioned the first pressure;
S9: detect the nitrogen pressure in nitrogen recycling treater, and set it as the 4th pressure;
S10: the supercharging multiple that regulates return-air topping-up pump B3 according to above-mentioned the 4th pressure;
S11: detect the nitrogen gas purity in nitrogen recycling treater outlet pipe, and set it as the second nitrogen gas purity;
S12: in the time that above-mentioned the second nitrogen gas purity is less than the second default purity, nitrogen recycling treater is carried out to regenerating molecular sieve deoxygenation.
Can child by aforesaid method step, the embodiment of the present application regulates the airshed that of compressed air reservoir on the one hand according to the nitrogen pressure in nitrogen storage storage outlet pipe, thereby controls the turnout of nitrogen, avoids excessive production; Also realize nitrogen recycling treater has been carried out to regenerating molecular sieve deoxygenation on the other hand, make it again possess the function of the oxygen in absorption recovery nitrogen, and according to the supercharging multiple of the nitrogen pressure adjusting return-air topping-up pump in nitrogen recycling treater, the nitrogen that thereby purity after recycling can be greater than to the second default purity carries out again sending into high pressure nitrogen holder after suitable supercharging, and then is used equipment utilization by nitrogen.Therefore, the embodiment of the present application has been avoided energy dissipation to a greater extent, has reduced systematic running cost use.
Further, aforesaid method embodiment also comprises step:
Detect the liquid level that nitrogen recycling stores hydathode, as the first liquid level;
Regulate the water discharge valve aperture of nitrogen recycling storage hydathode according to above-mentioned the first liquid level,
The liquid level that stores hydathode according to nitrogen recycling regulates nitrogen recycling to store the water discharge valve aperture of hydathode, can make nitrogen recycling store hydathode isolated moisture from nitrogen and discharge in time.
Further, aforesaid method embodiment also comprises step:
Detect the liquid level of nitrogen air-return water separator, as the second liquid level;
Regulate the water discharge valve aperture of nitrogen air-return water separator according to above-mentioned the second liquid level.
The water discharge valve aperture that regulates nitrogen air-return water separator according to the liquid level of nitrogen air-return water separator, can make nitrogen air-return water separator isolated moisture from nitrogen discharge in time.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can carry out the hardware that instruction is relevant by computer program to complete, described program can be stored in a computer read/write memory medium, described program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage media can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the application.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the case of not departing from the application's spirit or scope, realize in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. nitrogen is prepared a recovery system control method, and described system comprises prepares unit and recovery unit, and the described unit of preparing comprises compressed air reservoir, nitrogen preparing device, nitrogen storage storage and low-pressure nitrogen holder, it is characterized in that, described method comprises:
Detect the nitrogen pressure in described nitrogen storage storage outlet pipe, using the nitrogen pressure in described nitrogen storage storage outlet pipe as the first pressure;
Regulate the airshed that of described compressed air reservoir according to described the first pressure;
Wherein, described nitrogen preparing device comprises the first nitrogen preparing device and the second nitrogen preparing device; The working order of described the first nitrogen preparing device and the second nitrogen preparing device is contrary; Described working order comprises prepares state and reproduced state;
Described method also comprises:
Detect nitrogen gas purity and nitrogen flow in described nitrogen storage storage intake ducting, and using the nitrogen gas purity in described nitrogen storage storage intake ducting as the first nitrogen gas purity;
In the time that described nitrogen flow is greater than preset flow and/or described the first nitrogen gas purity and is less than the first default purity, change the working order of described the first nitrogen preparing device and the second nitrogen preparing device, carry out regenerating molecular sieve in reproduced state person.
2. method according to claim 1, is characterized in that, the air outlet of described compressed air reservoir is provided with load control valve, for regulating the airshed that of described compressed air reservoir;
The described airshed that goes out that regulates described compressed air reservoir according to described the first pressure, comprising:
In the time that described the first pressure is greater than preset pressure, reduce the aperture of load control valve; In the time that described the first pressure is less than preset pressure, increase the aperture of described load control valve; Described load control valve is arranged at the air outlet of described compressed air reservoir.
3. method according to claim 1 and 2, is characterized in that, the described unit of preparing also comprises high pressure nitrogen holder;
Described method also comprises:
Detect the nitrogen pressure in described high pressure nitrogen holder outlet pipe, using the nitrogen pressure in described high pressure nitrogen holder outlet pipe as the 3rd pressure;
Regulate the supercharging multiple of topping-up pump according to described the 3rd pressure.
4. method according to claim 1, is characterized in that, described recovery unit comprises that nitrogen recycling stores hydathode, cooling and refrigerating apparatus, nitrogen air-return water separator and nitrogen recycling treater; The inlet mouth of described nitrogen recycling treater is connected with the air outlet of described nitrogen air-return water separator; The air outlet of described nitrogen recycling treater is connected to the inlet mouth of high pressure nitrogen holder by return-air topping-up pump;
Described method also comprises:
Detect the nitrogen pressure in described nitrogen recycling treater, and nitrogen pressure in described nitrogen recycling treater is as the 4th pressure;
Regulate the supercharging multiple of described return-air topping-up pump according to described the 4th pressure;
And/or,
Detect the nitrogen gas purity in described nitrogen recycling treater outlet pipe, and using the nitrogen gas purity in described nitrogen recycling treater outlet pipe as the second nitrogen gas purity;
In the time that described the second nitrogen gas purity is less than the second default purity, described nitrogen recycling treater is carried out to regenerating molecular sieve.
5. a nitrogen is prepared recovery system, comprise and prepare unit and recovery unit, the described unit of preparing comprises compressed air reservoir, nitrogen preparing device, nitrogen storage storage and low-pressure nitrogen holder, it is characterized in that, described nitrogen storage storage outlet pipe is provided with the first pressure detecting instrument, for detection of the nitrogen pressure in described nitrogen storage storage outlet pipe;
The air outlet of described compressed air reservoir is provided with load control valve, for regulating the airshed that of described compressed air reservoir;
Described system also comprises load governor, for the nitrogen pressure detecting according to described the first pressure detecting instrument, regulates the aperture of described load control valve;
Wherein, described nitrogen preparing device comprises the first nitrogen preparing device and the second nitrogen preparing device; The working order of described the first nitrogen preparing device and the second nitrogen preparing device is contrary; Described working order comprises prepares state and reproduced state;
Described nitrogen storage storage intake ducting is provided with nitrogen flow detector and the first nitrogen gas purity detector; Described nitrogen flow detector is for detection of nitrogen flow in described nitrogen storage storage intake ducting; Described the first nitrogen gas purity detector is for detection of the nitrogen gas purity in described nitrogen storage storage intake ducting;
Described system also comprises refresh controller; Described refresh controller is connected with nitrogen flow detector and the first nitrogen gas purity detector respectively, be greater than for the nitrogen flow detecting when described nitrogen flow detector nitrogen gas purity that preset flow and/or described the first nitrogen gas purity detector detect and be less than first while presetting purity, change the working order of described the first nitrogen preparing device and the second nitrogen preparing device, carry out regenerating molecular sieve.
6. system according to claim 5, is characterized in that, the air outlet of described compressed air reservoir is provided with load control valve, for regulating the airshed that of described compressed air reservoir;
When the nitrogen pressure detecting when described the first pressure detecting instrument is greater than preset pressure, the aperture of load control valve reduces described in described load governor control; When the nitrogen pressure detecting when described the first pressure detecting instrument is less than preset pressure, the aperture of load control valve increases described in described load governor control.
7. according to the system described in claim 5 or 6, it is characterized in that, the described unit of preparing also comprises high pressure nitrogen holder and high pressure controller;
The inlet mouth of described high pressure nitrogen holder is connected with the air outlet of low-pressure nitrogen holder by topping-up pump; The air outlet access nitrogen of described high pressure nitrogen holder uses equipment;
Described high pressure nitrogen holder outlet pipe is provided with the 3rd pressure detecting instrument, for detection of the nitrogen pressure in described high pressure nitrogen holder outlet pipe;
Described high pressure controller is connected with described the 3rd pressure detecting instrument and topping-up pump respectively, for the nitrogen pressure detecting according to described the 3rd pressure detecting instrument, regulates the supercharging multiple of described topping-up pump.
8. system according to claim 5, is characterized in that, described recovery unit comprises that nitrogen recycling stores hydathode, cooling and refrigerating apparatus, nitrogen air-return water separator and nitrogen recycling treater; The inlet mouth of described nitrogen recycling treater is connected with the air outlet of described nitrogen air-return water separator; The air outlet of described nitrogen recycling treater is connected to the inlet mouth of high pressure nitrogen holder by return-air topping-up pump;
Described nitrogen recycling treater is provided with the 4th pressure detecting instrument, for detection of the nitrogen pressure in described nitrogen recycling treater;
Described system also comprises back pressure controller; Described back pressure controller is connected with the 4th pressure detecting instrument and return-air topping-up pump respectively, for the nitrogen pressure detecting according to described the 4th pressure detecting instrument, regulates the supercharging multiple of described return-air topping-up pump;
And/or,
Described nitrogen recycling treater outlet pipe is provided with the second nitrogen gas purity detector, for detection of the nitrogen gas purity in described nitrogen recycling treater outlet pipe; The recoil mouth of described nitrogen recycling treater is connected to nitrogen by recoil valve and uses equipment, and the venting port of described nitrogen recycling treater is provided with vent valve; On pipeline between nitrogen recycling treater and return-air topping-up pump, be provided with air outlet valve,
Described system also comprises return-air control of purity device; Described return-air control of purity device is connected with described the second nitrogen gas purity detector, air outlet valve, recoil valve and vent valve respectively, while being less than the second default purity for the nitrogen gas purity detecting when described the second nitrogen gas purity detector, open described air outlet valve, recoil valve and vent valve, described nitrogen recycling treater is carried out to regenerating molecular sieve.
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| CN104163404B (en) * | 2014-06-09 | 2016-01-20 | 宝钢股份黄石涂镀板有限公司 | Recoverying and utilizing method and the device of dirty oxide gas is regenerated in nitrogen purification process |
| CN104720074B (en) * | 2015-04-21 | 2017-11-10 | 温中彬 | A kind of freeze preservation movement production line for making liquid nitrogen by oneself |
| CN111982407A (en) * | 2020-08-11 | 2020-11-24 | 山西国投海德利森氢能装备股份有限公司 | A airtight detecting system for hydrogen energy automobile |
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