CN105176805A - Gas stirring control system and method - Google Patents
Gas stirring control system and method Download PDFInfo
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- CN105176805A CN105176805A CN201510490212.7A CN201510490212A CN105176805A CN 105176805 A CN105176805 A CN 105176805A CN 201510490212 A CN201510490212 A CN 201510490212A CN 105176805 A CN105176805 A CN 105176805A
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Abstract
The invention provides a gas stirring control system and method. The system comprises a fermenting tank, a methane boost system, and a controller; the lower end of the fermenting tank is connected with a plurality of stirring valves used for opening or closing the fermenting tank; the upper end of the methane boost system is connected with the upper end of the fermenting tank through a low pressure line, and the lower end of the methane boost system is connected with a plurality of stirring valves through a high pressure line; the methane boost system is used for boosting gas flowing from the fermenting tank into the methane boost system; the controller is connected between the methane boost system and the plurality of stirring valves and controls one of the stirring valves to open according to the pressure of the gas boosted by the methane boost system. The system provides stirring required pressure, the controller controls opening of the plurality of stirring valves at the bottom of the fermenting tank, and thus materials in the fermenting tank can be evenly stirred.
Description
Technical field
The present invention has about a kind of gas stirring Controlling System and method, especially has gas stirring Controlling System and method about processing organic rubbish in a kind of urban life field.
Background technology
At present, dry anaerobic fermentation process, for the treatment of domestic waste, poultry dung and stalk organic waste, obtains renewable energy source while process organic waste.The advantages such as dry-type anaerobic fermentation is higher due to fermented product concentration, has higher volume yield rate, water saving, and natural pond liquid generation is few.But then, because higher solid content, significant impact will be produced on mass transfer, heat transfer, thus higher stirring system can alleviate the contradiction between high solid content and mass-and heat-transfer, make mixing of materials even, the contact of material and microorganism is provided, accelerate organic decomposition.
In dry anaerobic fermentation process, stirring is the technological difficulties of this technique, generally has three kinds of alr modes, mechanical stirring, feed back stirring and biogas return stirring.Wherein, with compressed biogas stir leakage, mechanical wear, consumption of power that mechanical stirring can be avoided to bring high, stir the shortcomings such as uneven, and reactor is without any the mechanical part of activity, and reactor runs more reliable, safeguards and also greatly simplifies.
But how this kind of alr mode realizes automatic control (entry condition, interval time, time length, stirring pressure) is a difficult point, the specific aim of the complex state in traditional continuously stirring/timing aeration agitation reply fermentor tank is not strong, be embodied in stirring limited pressure on the one hand, mixing effect can change because of the viscosity of material and density etc.,, density comparatively large in viscosity is larger, mixing effect can be deteriorated; On the other hand, because the gas flow of stirring is fixed and cannot be radiated whole fermentor tank, therefore there is blind area the position of fermenter base tank skin, along with the increase of working time, the heavies such as the sandstone in blind area can slowly pile up formation throw out, and mixing effect is progressively deteriorated, and stirring efficiency is low, not only cause the waste of equipment electric energy, more can the biochemical environment in anaerobic fermentation tank be impacted.
Therefore, be necessary to provide a kind of new gas agitating system and method, overcome the problems referred to above.
Summary of the invention
The object of this invention is to provide a kind of gas stirring Controlling System, provided by biogas booster system and stir required pressure, and control by controller the multiple stirring valves opening fermenter base, thus reach the object of the material in fermentor tank being carried out to uniform stirring.
Another object of the present invention is to provide a kind of gas stirring control method, thered is provided by biogas booster system and stir required pressure, and control by controller the multiple stirring valves opening fermenter base, thus reach the object of the material in fermentor tank being carried out to uniform stirring.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
The invention provides a kind of gas stirring Controlling System, it comprises:
Fermentor tank, its lower end is connected with multiple stirring valve, and described stirring valve is used for opening or cutting out described fermentor tank;
Biogas booster system, its upper end is connected by the upper end of low pressure line with described fermentor tank, and its lower end connects multiple described stirring valve by pressure duct, and described biogas booster system is used for the gas boost flowed in described fermentor tank in described biogas booster system;
Controller, it is connected between described biogas booster system and multiple described stirring valve, and described controller controls one of multiple described stirring valve according to the gaseous tension after described biogas booster system boosting and opens.
In a preferred embodiment, described low pressure line is connected with low pressure valve, described pressure duct is connected with high-pressure valve.
In a preferred embodiment, described low pressure line and described pressure duct are connected to tensimeter.
In a preferred embodiment, described biogas booster system comprises accumulator, and described accumulator is connected with multiple Marsh gas compression machine, and described accumulator is connected with multiple described stirring valve, and multiple described Marsh gas compression machine is connected with described fermentor tank.
In a preferred embodiment, the sidewall of described fermentor tank is equipped with insert viscometer.
In a preferred embodiment, liquidometer is equipped with at the top of described fermentor tank.
In a preferred embodiment, multiple described stirring valve is evenly arranged along the circumferential direction of described fermenter base.
The present invention also provides a kind of gas stirring control method of gas stirring Controlling System as above, and described gas stirring control method comprises the steps:
A) start biogas booster system, described biogas booster system is connected with fermentor tank by low pressure line;
B) gas pressure value in the pressure duct after the boosting of described biogas booster system is obtained in real time by controller;
C) determine whether described gas pressure value is more than or equal to the first force value by described controller, if described gas pressure value is more than or equal to described first force value, then select to open one of them in multiple stirring valve by described controller.
In a preferred embodiment, at described step c) in, starting described biogas booster system and after the lasting very first time, under the state that described gas pressure value is still less than described first force value, then closing described biogas booster system.
In a preferred embodiment, at described step c) after also comprise steps d) in multiple described stirring valve one of them open after, the gas pressure value in pressure duct described in Real-time Obtaining is continued by described controller, and determine whether this gas pressure value is less than or equal to the second force value, described second force value is less than described first force value; If this gas pressure value is less than or equal to described second force value, then close the described stirring valve opened.
In a preferred embodiment, in described steps d) in, if after second time of continuing, the described gas pressure value continuing to determine still is greater than described second force value, then close the described stirring valve opened.
In a preferred embodiment, the difference of described first force value and described second force value is 0.5bar ~ 4bar.
In a preferred embodiment, in described steps d) complete after, move in circles successively perform described step b), described step c) and described steps d), perform to described step c each) and described steps d) time, described controller is pressed the clockwise direction of described fermenter base or is counterclockwise selected successively to open and close corresponding stirring valve.
Feature and the advantage of gas stirring Controlling System of the present invention and method are:
1) utilize the biogas booster system of band accumulator to stir by even higher to 9bar for stirring boost in pressure, better power provided compared with stirring with tradition, more, heavier material can be stirred.
2) adopt multiple stirring valve subregion, the mode that stirs in order ensure that each dynamics stirred, also serve the function stirred with different positions from different perspectives simultaneously, make stirring evenly, also make the material in fermentor tank define the flow direction of process requirements.
3) the first force value and the second force value is calculated by liquidometer and insert viscometer, automatically dynamics and the time of stirring is adjusted by controller, provide adaptivity to continual stirring in 24 hours under normal circumstances, without the need to manual intervention, save labor capacity and more reliable.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of gas stirring Controlling System of the present invention.
Fig. 2 is the structural representation of multiple stirring valves that the fermenter base of gas stirring Controlling System of the present invention is arranged.
Fig. 3 is the schema of gas stirring control method of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
As shown in Figure 1, the invention provides a kind of gas stirring Controlling System, it comprises fermentor tank 1, biogas booster system 2 and controller 3, and wherein: fermentor tank 1 lower end is connected with multiple stirring valve 11, described stirring valve 11 is for opening or cutting out described fermentor tank 1; The upper end of biogas booster system 2 is connected with the upper end of described fermentor tank 1 by low pressure line 21, its lower end connects multiple described stirring valve 11 by pressure duct 22, and described biogas booster system 2 is for the gas boost flowed in described fermentor tank 1 in described biogas booster system 2; Controller 3 is connected between described biogas booster system 2 and multiple described stirring valve 11, and the gaseous tension after described controller 3 boosts according to described biogas booster system 2 controls one of multiple described stirring valve 11 and opens.
Specifically, be loaded with material in fermentor tank 1, the biogas of fermentor tank 1 collected overhead, a part discharges present system as biogas utilization by the branch road 211 be connected on low pressure line 21, and another part injects in biogas booster system 2 by low pressure line 21; In this enforcement, low pressure line 21 is connected with low pressure valve 212, this low pressure valve 212 is with opening or cutting out low pressure line 21, and low pressure line 21 is also connected with tensimeter 213, and this tensimeter 213 is for detecting the pressure of low pressure line 21.The bottom of fermentor tank 1 is connected with multiple stirring valve 11, and as shown in Figure 2, those stir valve 11 and evenly arrange along the circumferential direction bottom fermentor tank 1.In the present invention, the sidewall of fermentor tank 1 is equipped with insert viscometer 12, this insert viscometer 12 is for detecting the viscosity of material in fermentor tank 1; Further, liquidometer 13 is equipped with at the top of fermentor tank 1, this liquidometer 13 height detecting material in fermentor tank 1.
This biogas booster system 2 comprises accumulator 23, and accumulator 23 is connected with multiple Marsh gas compression machine 24, and wherein, accumulator 23 is connected with multiple stirring valve 11, and multiple Marsh gas compression machine 24 is connected with fermentor tank 1.Inject the biogas in biogas booster system 2 in fermentor tank 1, biogas boosting after multiple Marsh gas compression machine 24 compresses, the biogas storage after boosting is in accumulator 23.
Controller 3 is arranged on pressure duct 22, in this enforcement, pressure duct 22 is connected with high-pressure valve 221, this high-pressure valve 221 is for opening or closing pressure duct 22, pressure duct 22 is also connected with tensimeter 222, and this tensimeter 222 is for detecting the pressure of pressure duct 22.Controller 3 is connected between the accumulator 23 of biogas booster system 2 and multiple stirring valve 11, gaseous tension after this controller 3 can boost according to biogas booster system 2 controls one of multiple stirring valve 11 and opens, also be, control one of multiple stirring valve 11 according to the biogas pressure in accumulator 23 to open, thus make biogas booster system 2 and fermentor tank 1 form connected loop.
In specifically implementing one, controller 3 uses the AC800F controlling center of frequency converter A BB, the S800 that slave station is affiliated to series I/O process fastener, and the insert viscometer 12 on fermentor tank 1 and liquidometer 13, all with remote transmission function, can read online; Programming software aspect employs configuration software and the upper computer software of FREELANCE2000 series.
The working process of this gas stirring Controlling System is as follows: open the low pressure valve 212 on low pressure line 21 and the high-pressure valve 221 on pressure duct 22, then biogas booster system 2 is started, because multiple stirring valve 11 is in closing condition, the pressure in pressure duct 22 can rise gradually, afterwards, the gas pressure value in the pressure duct 22 after biogas booster system 2 boosting is obtained by controller 3, and determine whether this gas pressure value is more than or equal to the first force value H1, this first force value H1 determines maximal pressure force value when stirring, if this gas pressure value is more than or equal to the first force value H1, then select to open one of them in multiple stirring valve 11 by controller 3, wherein, this first force value H1 is calculated by insert viscometer 12 and liquidometer 13, the boosting biogas now stored in biogas booster system 2 forms stirring action by the material spurting into fermentor tank 1 from the stirring valve 11 opened, meanwhile, the minimizing of the compressed biogas amount in biogas booster system 2 can cause the decline of stirring pressure, in multiple stirring valve 11 one of them open and certain time after, the gas pressure value in Real-time Obtaining pressure duct 22 is continued by controller 3, and determine whether this gas pressure value is less than or equal to the second force value H2, this second force value H2 is the minimal pressure force value determining to stir, this second force value H2 is less than the first force value H1, wherein, this second force value H2 is also calculated by viscometer 12 and liquidometer 13, in the present invention, the difference of the first force value H1 and the second force value H2 is 0.5bar ~ 4bar, this difference determines the severe degree of stirring and each time length of stirring, if the gas pressure value continuing to determine by controller is less than or equal to the second force value H2, then close the stirring valve 11 opened, this gas stirring Controlling System just completes a whipping process like this.Afterwards, to go round and begin again repetition above-mentioned steps, in whipping process each time, when needing to perform one of them in the multiple stirring valve 11 of opening and closing, controller 3 selects the stirring valve 11 opened to be according to the clockwise direction bottom fermentor tank 1 or the stirring valve 11 counterclockwise sequentially selecting correspondence.
In one embodiment, as shown in Figure 2, the bottom of fermentor tank 1 is provided with eight stirring valves 11, the bottom part of fermentor tank 1 is separated out eight regions by eight stirring valves 11, and the label (1) to (8) in each region is the order of the required stirring valve 11 opened in whipping process each time.Certainly, in other examples, the opening sequence stirring valve 11 can be also (1)-(2)-(3)-(8)-(4)-(5)-(1)-(6)-(7)-(8), and this is not restricted.
It should be noted that at this, also there are following Special Circumstances in this gas stirring Controlling System:
1) under the state of multiple stirring valve 11 closedown, start biogas booster system 2 and after continuing very first time T1, wherein, very first time T1 determines that pressurization detects the supercharging whether normal time, if the gas pressure value in pressure duct 22 is still less than the first force value H1, then judge that system exists abnormal, this Time Controller 3 will close biogas booster system 2 and all valves.
2) under one of them state of opening of multiple stirring valve 11, also under the state that namely the biogas booster system 2 of gas stirring Controlling System of the present invention and fermentor tank 1 are in a circulation loop, if after continuing the second time T2, wherein, second time T2 is the maximum duration allowed when determining that single stirs, gas pressure value in the pressure duct 22 that this controller 3 obtains still is greater than the second force value H2, then may there is the blocking of pipeline or nozzle, now no matter gas pressure value is how many, and closedown has been opened and stirred valve 11 by controller 3.
3) when gas stirring Controlling System automatic stirring of the present invention runs, operator can send and stop automatic stirring instruction, controller 3 is receiving this instruction and after completing current stirring operation, will close biogas booster system 2 and all valves, automatic stirring terminates.
Gas stirring Controlling System of the present invention has following features and advantage:
1) utilize the biogas booster system 2 of band accumulator 23 to stir by even higher to 9bar for stirring boost in pressure, better power provided compared with stirring with tradition, more, heavier material can be stirred.
2) adopt multiple stirring valve 11 subregion, the mode that stirs in order ensure that each dynamics stirred, also serve the function stirred with different positions from different perspectives simultaneously, make stirring evenly, also make the material in fermentor tank 1 define the flow direction of process requirements.
3) the first force value H1 and the second force value H2 (this account form is account form well known in the prior art) is calculated by liquidometer 13 and insert viscometer 12, automatically the dynamics and time that stir is adjusted by controller 3, provide adaptivity to continual stirring in 24 hours under normal circumstances, without the need to manual intervention, save labor capacity and more reliable.
Embodiment two
As shown in Figure 3, the present invention also provides a kind of gas stirring control method of the gas stirring Controlling System as described in embodiment one, and the method comprises:
A) start biogas booster system 2, described biogas booster system 2 is connected with fermentor tank 1 by low pressure line 21;
B) gas pressure value in the pressure duct 22 after the boosting of described biogas booster system 2 is obtained in real time by controller 3;
C) determine whether described gas pressure value is more than or equal to the first force value H1 by described controller 3, if described gas pressure value is more than or equal to described first force value H1, then select to open one of them in multiple stirring valve 11 by described controller 3.
Specifically, step a) in: open the low pressure valve 212 on low pressure line 21 and the high-pressure valve 221 on pressure duct 22, then start biogas booster system 2, because multiple stirring valve 11 is in closing condition, the pressure in pressure duct 22 can rise gradually;
In step b) in: obtain the gas pressure value in the pressure duct 22 after biogas booster system 2 boosting by controller 3;
In step c) in: determine whether this gas pressure value is more than or equal to the first force value H1 by controller 3, this first force value H1 determines maximal pressure force value when stirring, if this gas pressure value is more than or equal to the first force value H1, then select to open one of them in multiple stirring valve 11 by controller 3, wherein, this first force value H1 is calculated by insert viscometer 12 and liquidometer 13, and the boosting biogas now stored in biogas booster system 2 forms stirring action by spurting in fermentor tank 1 material from the stirring valve 11 opened;
In step c) be finished after, the minimizing of the compressed biogas amount in biogas booster system 2 can cause the decline of stirring pressure, in the present embodiment, in step c) after also comprise steps d) in multiple stirring valve 11 one of them open after, the gas pressure value in Real-time Obtaining pressure duct 22 is continued by controller 3, and determine whether this gas pressure value is less than or equal to the second force value H2, wherein, this second force value H2 is the minimal pressure force value determining to stir, this second force value H2 is also calculated by insert viscometer 12 and liquidometer 13, this second force value H2 is less than the first force value H1, in the present invention, the difference of the first force value H1 and the second force value H2 is 0.5bar ~ 4bar, this difference determines the severe degree of stirring and each time length of stirring, if the gas pressure value continuing to determine by controller is less than or equal to the second force value H2, then close the stirring valve 11 opened, this gas stirring Controlling System just completes a whipping process like this.
In described steps d) complete after, move in circles successively perform step b), step c) and steps d), performing to step c at every turn) and steps d) time, controller 3 is pressed the clockwise direction bottom fermentor tank 1 or is counterclockwise selected successively to open and close corresponding stirring valve 11.Also be, in whipping process each time, when needing to perform one of them in the multiple stirring valve 11 of opening and closing, controller 3 selects the stirring valve 11 opened to be according to the clockwise direction bottom fermentor tank 1 or the stirring valve 11 counterclockwise sequentially selecting correspondence.
It should be noted that at this, also there are following Special Circumstances in this gas stirring control method:
1) under the state of multiple stirring valve 11 closedown, start biogas booster system 2 and after continuing very first time T1, wherein, very first time T1 determines that pressurization detects the supercharging whether normal time, if the gas pressure value in pressure duct 22 is still less than the first force value H1, then judge that system exists abnormal, this Time Controller 3 will close biogas booster system 2 and all valves.
2) under one of them state of opening of multiple stirring valve 11, also under the state that namely the biogas booster system 2 of gas stirring Controlling System of the present invention and fermentor tank 1 are in a circulation loop, if after continuing the second time T2, wherein, second time T2 is the maximum duration allowed when determining that single stirs, gas pressure value in the pressure duct 22 that this controller 3 obtains still is greater than the second force value H2, then may there is the blocking of pipeline or nozzle, now no matter gas pressure value is how many, and closedown has been opened and stirred valve 11 by controller 3.
3) when gas stirring Controlling System automatic stirring of the present invention runs, operator can send and stop automatic stirring instruction, controller 3 is receiving this instruction and after completing current stirring operation, will close biogas booster system 2 and all valves, automatic stirring terminates.
Gas stirring control method of the present invention has following features and advantage:
1) utilize the biogas booster system 2 of band accumulator 23 to stir by even higher to 9bar for stirring boost in pressure, better power provided compared with stirring with tradition, more, heavier material can be stirred.
2) adopt multiple stirring valve 11 subregion, the mode that stirs in order ensure that each dynamics stirred, also serve the function stirred with different positions from different perspectives simultaneously, make stirring evenly, also make the material in fermentor tank 1 define the flow direction of process requirements.
3) the first force value H1 and the second force value H2 (this account form is account form well known in the prior art) is calculated by liquidometer 13 and insert viscometer 12, automatically the dynamics and time that stir is adjusted by controller 3, provide adaptivity to continual stirring in 24 hours under normal circumstances, without the need to manual intervention, save labor capacity and more reliable.
Separately, the present invention describes with reference to according to the schema of the method for the embodiment of the present invention, equipment (system) and computer program and/or skeleton diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or skeleton diagram and/or square frame and schema and/or skeleton diagram and/or square frame.These computer program instructions can being provided to the treater of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the treater of computer or other programmable data processing device produce device for realizing the function of specifying in schema flow process or multiple flow process and/or skeleton diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in schema flow process or multiple flow process and/or skeleton diagram square frame or multiple square frame.
The foregoing is only several embodiments of the present invention, those skilled in the art can carry out various change or modification to the embodiment of the present invention according to content disclosed in application documents and not depart from the spirit and scope of the present invention.
Claims (13)
1. a gas stirring Controlling System, is characterized in that, it comprises:
Fermentor tank, its lower end is connected with multiple stirring valve, and described stirring valve is used for opening or cutting out described fermentor tank;
Biogas booster system, its upper end is connected by the upper end of low pressure line with described fermentor tank, and its lower end connects multiple described stirring valve by pressure duct, and described biogas booster system is used for the gas boost flowed in described fermentor tank in described biogas booster system;
Controller, it is connected between described biogas booster system and multiple described stirring valve, and described controller controls one of multiple described stirring valve according to the gaseous tension after described biogas booster system boosting and opens.
2. gas stirring Controlling System as claimed in claim 1, is characterized in that, described low pressure line is connected with low pressure valve, described pressure duct is connected with high-pressure valve.
3. gas stirring Controlling System as claimed in claim 1, is characterized in that, described low pressure line and described pressure duct are connected to tensimeter.
4. gas stirring Controlling System as claimed in claim 1, it is characterized in that, described biogas booster system comprises accumulator, and described accumulator is connected with multiple Marsh gas compression machine, described accumulator is connected with multiple described stirring valve, and multiple described Marsh gas compression machine is connected with described fermentor tank.
5. gas stirring Controlling System as claimed in claim 1, is characterized in that, the sidewall of described fermentor tank is equipped with insert viscometer.
6. gas stirring Controlling System as claimed in claim 1, it is characterized in that, liquidometer is equipped with at the top of described fermentor tank.
7. gas stirring Controlling System as claimed in claim 1, it is characterized in that, multiple described stirring valve is evenly arranged along the circumferential direction of described fermenter base.
8. a gas stirring control method for the gas stirring Controlling System according to any one of claim 1-7, is characterized in that, described gas stirring control method comprises the steps:
A) start biogas booster system, described biogas booster system is connected with fermentor tank by low pressure line;
B) gas pressure value in the pressure duct after the boosting of described biogas booster system is obtained in real time by controller;
C) determine whether described gas pressure value is more than or equal to the first force value by described controller, if described gas pressure value is more than or equal to described first force value, then select to open one of them in multiple stirring valve by described controller.
9. gas stirring control method as claimed in claim 8, it is characterized in that, at described step c) in, to continue after the very first time in the described biogas booster system of startup, under the state that described gas pressure value is still less than described first force value, then close described biogas booster system.
10. gas stirring control method as claimed in claim 8, it is characterized in that, at described step c) after also comprise steps d) in multiple described stirring valve one of them open after, the gas pressure value in pressure duct described in Real-time Obtaining is continued by described controller, and determine whether this gas pressure value is less than or equal to the second force value, described second force value is less than described first force value; If this gas pressure value is less than or equal to described second force value, then close the described stirring valve opened.
11. gas stirring control methods as claimed in claim 10, is characterized in that, in described steps d) in, if after second time of continuing, the described gas pressure value continuing to determine still is greater than described second force value, then close the described stirring valve opened.
12. gas stirring control methods as claimed in claim 10, is characterized in that, the difference of described first force value and described second force value is 0.5bar ~ 4bar.
13. gas stirring control methods as claimed in claim 10, it is characterized in that, in described steps d) complete after, move in circles successively perform described step b), described step c) and described steps d), perform to described step c each) and described steps d) time, described controller is pressed the clockwise direction of described fermenter base or is counterclockwise selected successively to open and close corresponding stirring valve.
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