CN204930362U - Based on the vacuum conditioner of screw-type vacuum pump - Google Patents
Based on the vacuum conditioner of screw-type vacuum pump Download PDFInfo
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- CN204930362U CN204930362U CN201520560782.4U CN201520560782U CN204930362U CN 204930362 U CN204930362 U CN 204930362U CN 201520560782 U CN201520560782 U CN 201520560782U CN 204930362 U CN204930362 U CN 204930362U
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Abstract
The utility model discloses a kind of vacuum conditioner based on screw-type vacuum pump, comprise cylindrical shell, the outlet of cylindrical shell is connected with condenser with vacuum valve by pipeline, the top of condenser is provided with cooling tower, the outlet of condenser is connected with screw vacuum pump and lobe pump respectively by pipeline, the inlet ductwork of screw vacuum pump and lobe pump is respectively equipped with screw-down valve and import Roots valve.The export pipeline of screw vacuum pump and lobe pump is respectively equipped with evacuated tube and outlet Roots valve.The export pipeline of condenser is provided with filter.The side of the export pipeline of filter is connected with water-circulating pump, and water-circulating pump is provided with blast pipe, and the inlet ductwork of water-circulating pump is provided with water-pump valve.Improve the final vacuum of damping machine, increase the migration rate of water of tobacco leaf, and greatly reduce steam energy consumption.Solve the problems such as WZ type vacuum conditioner energy consumption is high, the pressure oscillation of steam pipe netting twine large, tobacco leaf migration rate of water is not high.
Description
Technical field
The utility model relates to a kind of vacuum conditioner, particularly relates to a kind of vacuum conditioner based on screw-type vacuum pump.
Background technology
The equipment that the former cigarette moisture regain of current beating and double roasting enterprise uses is mostly WZ type vacuum conditioner, and its production capacity is 4000 ~ 12000kg/h.The principle of this kind of pumped vacuum systems is mainly steam injection or water injection sprays with steam the mode that combines, and its shortcoming is that steam energy consumption is high, vacuum is large compared with low (working limit vacuum 266Pa), noise.It is higher that the loose cigarette purchase particularly promoted at present and packaging process vacuum level requirements to sheet cigarette, and traditional injection pumped vacuum systems can not meet the demand of tobacco redrying enterprise process for cleanly preparing completely.
WZ type vacuum conditioner Problems existing and analysis:
WZ type vacuum conditioner system architecture and operation principle:
As shown in Figure 1, the complete steam-sprayed vacuum conditioner volume of WZ type of the prior art is 44m
3, per production cycle processes former tobacco leaf 4800kg (often criticizing, lower same), and adopt level Four six pump type steam jet vacuum system, the working time of the every platform steam-jet vacuum pump of each cycle and nominal steam consumption are in table 1.
Working time of every platform steam jet pump and nominal steam consumption when table 1 steam pressure is 0.8Mpa
Peak flow: 1. 2 triplexes, peak flow 2760kg/h when 1 four-stage pump is opened simultaneously.2. peak flow 4760kg/h when C.Y.E.S1.S1 opens simultaneously.
As shown in Table 1, when pressure of steam supply is 0.8MPa, the deficiency that this pumped vacuum systems exists is: every grade of steam jet pump energy consumption is large; When finding time, steam consumption quantity peak value is up to 4760kg/h, large to steam pipe system fluctuation.
Vacuum pumping technological process: first start 1 four-stage pump, 2 triplexes, setting vacuum (-0.080Mpa) is reached after work 3min---close four-stage pump, open two stage pump, after work 1min, reach setting vacuum (-0.090MPa)---open primary pump, work 1min (vacuum is-0.096MPa)---open super primary pump, 2 triplexes are driven in work 1.5min (vacuum is 266Pa)---adding tide, moisturizing---, and 1 four-stage pump is broken empty after returning and taking out 1min.One cycle required time and actual measurement energy consumption are in table 2.From vacuum pumping technological process and table 2, the deficiency that this pumped vacuum systems exists is: working vacuum degree is low, only has 266Pa, is difficult to the technological requirement of satisfied tight tobacco bale, loose cigarette purchase tobacco bale; The quantity of steam consumption that one-period vacuumizes is up to 391.36kg.
Table 2 evacuated time and energy consumption
Case study:
As can be seen from Fig. 1 and table 2, this system architecture has the following disadvantages: 1. because pumped vacuum systems is interrupted draining, the volume of vacuum water tank limits the working time of one-level, secondary, triplex, and this system has certain limitation in application.2. every a collection of tobacco leaf finds time to consume steam 391.36kg, and humidification consumes steam and is about 276kg, and processing is often criticized former smoke consumption and added up to 667kg, and wherein vacuumizing consumed steam proportion is 58.6%.3. steam jet pump is convergent-divergent channel, and steam can not reclaim after spraying, and causes energy waste.4. steam is wasted seriously in course of conveying.Steam in course of conveying, pipeline long, ambient temperature is low all can cause energy loss, the water content of steam is high, when entering damping machine working site distributor, can discharge a part of condensed water, also causing waste of steam.Evacuation process is fluctuation status and amplitude is large, large on whole steam pipe system impact, to boiler attendance and energy consumption large.
Summary of the invention
The purpose of this utility model is to provide the vacuum conditioner based on screw-type vacuum pump that a kind of vacuum is high, steam energy consumption is low.
The purpose of this utility model is achieved through the following technical solutions:
Vacuum conditioner based on screw-type vacuum pump of the present utility model, comprise cylindrical shell, the outlet of described cylindrical shell is connected with condenser with vacuum valve by pipeline, the top of described condenser is provided with cooling tower, the outlet of described condenser is connected with screw vacuum pump and lobe pump respectively by pipeline, the inlet ductwork of described screw vacuum pump and lobe pump is respectively equipped with screw-down valve and import Roots valve.
The technical scheme provided as can be seen from above-mentioned the utility model, the vacuum conditioner based on screw-type vacuum pump that the utility model embodiment provides, owing to substituting the super steam jet pump in existing equipment with oily formula screw vacuum pump+lobe pump associating evacuation system, to improve the final vacuum of damping machine, increase the migration rate of water of tobacco leaf, and greatly reduce steam energy consumption.Solve the problems such as WZ type vacuum conditioner energy consumption is high, the pressure oscillation of steam pipe netting twine large, tobacco leaf migration rate of water is not high.
Accompanying drawing explanation
Fig. 1 is the complete steam-sprayed vacuum conditioner evacuation system structural representation of WZ type of the prior art;
The structural representation of the vacuum conditioner based on screw-type vacuum pump that Fig. 2 provides for the utility model embodiment.
In figure:
1, PCL touch screen controls; 2, collection dress magnetic valve; 3, water dispenser; 4, Pneumatic butterfly valve; 5, water inlet main valve; 6 and 7, plate valve is explained; 8, muffler of gas escape tube; 9 and 10, three grades of injectors; 11, level Four injector; 12, cooling tower; 13, steam distributor; 14, pneumatic ball valve; 15, air inlet main valve; 16, equipment for damping; 17, super first injector; 18, first injector; 19, vacuum valve; 20, air valve; 21, casing; 22, a condenser; 23, second injector; 24, No. two condensers; 25, special storage tank;
11, evacuated tube; 12, screw vacuum pump; 13, Roots's valve is exported; 14, lobe pump; 15, screw-down valve; 16, import Roots valve; 17, water-pump valve; 18, blast pipe; 19, water ring pump; 110, filter; 111, cooling tower; 112, condenser; 113, vacuum valve; 114, cylindrical shell.
Detailed description of the invention
To be described in further detail the utility model embodiment below.
Vacuum conditioner based on screw-type vacuum pump of the present utility model, its preferably detailed description of the invention be:
Comprise cylindrical shell, the outlet of described cylindrical shell is connected with condenser with vacuum valve by pipeline, the top of described condenser is provided with cooling tower, the outlet of described condenser is connected with screw vacuum pump and lobe pump respectively by pipeline, the inlet ductwork of described screw vacuum pump and lobe pump is respectively equipped with screw-down valve and import Roots valve.
The export pipeline of described screw vacuum pump and lobe pump is respectively equipped with evacuated tube and outlet Roots valve.
The export pipeline of described condenser is provided with filter.
The side of the export pipeline of described filter is connected with water-circulating pump, and described water-circulating pump is provided with blast pipe, and the inlet ductwork of described water-circulating pump is provided with water-pump valve.
Vacuum conditioner based on screw-type vacuum pump of the present utility model, spraying at conventional vapor vacuumizes on basis, the super steam jet pump substituted with oily formula screw vacuum pump+lobe pump associating evacuation system in existing equipment is proposed, to improve the final vacuum of damping machine, increase the migration rate of water of tobacco leaf, and greatly reduce steam energy consumption.Solve the problems such as WZ type vacuum conditioner energy consumption is high, the pressure oscillation of steam pipe netting twine large, tobacco leaf migration rate of water is not high, adopt Novel screw type evacuation system to substitute traditional steam injection or the method for water injection and steam combinations of injections, and the evacuation system of this vacuum conditioner is improved.Result shows: after improvement, damping machine vacuum brings up to 133Pa from 266Pa, increases loose tobacco bale migration rate of water more than 10%, reduces vacuum conditioner steam consumption 58.6%, processes former tobacco leaf per ton and can save 11.107kg mark coal, reduce carbon emission amount 7.55kg.
Specific embodiment:
As shown in Figure 2, for the shortcoming of steam jet pump, adopt the steam jet pump that oily formula screw vacuum pump+lobe pump associating evacuation system replaces in this equipment, cancel special storage tank and one, No. two condenser, water dispenser, blow-off line Sound Attenuator, cooling tower and drainage pipeline.
Pumped gas is entered the lower end of condenser through vacuum valve by casing, cooling water sprays down from the upper end of condenser the impurity removed pumped gas, and plays cooling down effect.Pumped gas enters lobe pump+screw pump unit through after condenser, is finally discharged in air.Cooling water enters the bottom water tank be connected with its lower end and temporarily stores after condenser.After finding time, the water of bottom water tank is delivered to the upper tank be connected with upper end of condenser by water pump, for finding time to prepare next time.
Vacuum pumping technique:
(1) when once finding time: first open screw vacuum pump depletion, when vacuum reaches-0.094MPa, automatically open lobe pump and find time; When vacuum is evacuated to-0.100MPa, closes vacuum valve, unload screw vacuum pump (screw vacuum pump is in holding state) simultaneously and close lobe pump; Then open and add damp valve, start tobacco leaf in casing and add tide, vexed car.
(2) when secondary is found time: first open vacuum valve, start screw vacuum pump, find time 1.5min simultaneously; Open air valve, unload screw vacuum pump (now screw vacuum pump is in holding state) simultaneously.
The principle of oily formula screw vacuum pump in the utility model:
Screw vacuum pump is built with pair of parallel spiral helicine rotor, and wherein the direction of rotation of a rotor is dextrorotation, and another part is left-handed.Two rotors keep synchronous backward to rotate by a pair gear in the pump housing.There is no friction between rotor and rotor, between rotor and the pump housing and keep certain gap.When the rotor rotates, gas is inhaled into rotor chamber from air inlet.After air inlet is closed, gas moves along screw rod direction.Along with the continuous rotation of rotor, gas is transferred to exhaust outlet and is discharged from exhaust outlet.The effect that the pumping fluid being filled with rotor chamber plays lubrication, sealing and cools.Pumping fluid be disposed to before in environment separated from the gas in gs-oil separator.Compression in screw-type vacuum pump is a continuous process, i.e. a relatively pulsation-free process.Pumping fluid can be retained in the built-in Oil-gas Separation bucket of vavuum pump by gs-oil separator (oil content), and has purified the gas of vavuum pump discharge.This process is divided into a few step and carries out in vavuum pump: 1. the cyclone type structure of oil content barrel can isolate heavier oil droplet; 2. pre-filtering; 3. all oil accumulations be recovered are in oil content barrel, and little oil droplet and mist of oil pool larger oil droplet and again fall into oil drum due to Action of Gravity Field.Entrance final vacuum can reach 70Pa.
Vacuumize the course of work:
Gas enters vacuum chamber by closed container through air inlet filter core and capacity transfer control valve by air inlet.Suction gas is formed oil/gas mixture with oil after screw rotor compression and is entered gs-oil separator, and drain in environment through exhaust outlet after gs-oil separator is separated, the gas in closed container is constantly drawn out of, and forms a continuous print evacuation process.The oil spraying into vacuum chamber is separated through the cyclone type structure of gs-oil separator, then filters through oil strainer, then again enters vacuum chamber through oil cooler, oil pump, forms a continuous circulation process.
Effect:
(1) loose cigarette migration rate of water contrast: working vacuum degree rises to 133Pa by 266Pa.Former vacuum conditioner is when processing the tobacco bale of loose cigarette purchase, and migration rate of water only has about 90%.After improvement, migration rate of water is more than or equal to 98%, reaches technological requirement.
(2) the steam pipe system fluctuation that former vacuum conditioning technique is brought is eliminated.Because finding time without the need to steam, then without steam peak flow (4760kg/h), humidification steam peak value can control completely.
(3) economic efficiency contrast: before transformation, a collection of former tobacco leaf of processing moisture regain vacuumizes and need consume steam and be about 391.36kg (do not comprise add tide 276kg steam), calculate by each moisture regain 4.8t tobacco leaf, amount to processing former cigarette per ton and only vacuumize that to consume steam be 81.46kg.Process 1 ton of former cigarette vacuumize need consume mark coal be: 11.64+0.052=11.692kg.Transformation aft-loaded airfoil tobacco leaf finds time no longer to consume steam, main is power with electric energy, the tobacco leaf of a collection of 4.8t of every evacuation processes, comprising a year maintenance cost, screw pump Unit erriger empty machine running power consumption, finding time to amount to processing former cigarette consumption electric energy per ton is 4.76KW.h [5].Then transform aft-loaded airfoil tobacco leaf per ton to vacuumize and consume mark coal and be:
4.76×122.9/1000＝0.585kg。
Calculate by processing 3.6 ten thousand tons of tobacco leaves (720,000 load) a medium scale beating and double roasting enterprise year, after adopting new GV4800+ lobe pump combined vacuum system, annual saving marks coal:
399.85t[(11.692－0.585)×36000＝399.85t]。
(4) social benefit contrast:
1. room noise is reduced to less than 80 decibels by original 90 decibels; 2. carbon emission amount is decreased.Reduce discharging standard according to country: save 1kg standard coal=reduction of discharging 2.493kg carbon dioxide=reduction of discharging 0.68kg carbon and calculate, a medium scale beating and double roasting enterprise processes 3.6 ten thousand tons of tobacco leaves per year and calculates, and can reduce CO2 discharge capacity the whole year is:
2.493×399.85t＝996.8t。
Reducing carbon emission amount is:
0.68×399.85t＝271.9t。
Conclusion:
Lobe pump+oil-flooded screw pump assembly substitutes the vacuum pumping method of traditional steam vavuum pump, has the advantage of low noise, high vacuum, high migration rate of water, low energy consumption, and auxiliary equipment is few simultaneously.
The above; be only the utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (4)
1. the vacuum conditioner based on screw-type vacuum pump, it is characterized in that, comprise cylindrical shell, the outlet of described cylindrical shell is connected with condenser with vacuum valve by pipeline, the top of described condenser is provided with cooling tower, the outlet of described condenser is connected with screw vacuum pump and lobe pump respectively by pipeline, the inlet ductwork of described screw vacuum pump and lobe pump is respectively equipped with screw-down valve and import Roots valve.
2. the vacuum conditioner based on screw-type vacuum pump according to claim 1, is characterized in that, the export pipeline of described screw vacuum pump and lobe pump is respectively equipped with evacuated tube and outlet Roots valve.
3. the vacuum conditioner based on screw-type vacuum pump according to claim 1, is characterized in that, the export pipeline of described condenser is provided with filter.
4. the vacuum conditioner based on screw-type vacuum pump according to claim 3, it is characterized in that, the side of the export pipeline of described filter is connected with water-circulating pump, and described water-circulating pump is provided with blast pipe, and the inlet ductwork of described water-circulating pump is provided with water-pump valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520560782.4U CN204930362U (en) | 2015-07-29 | 2015-07-29 | Based on the vacuum conditioner of screw-type vacuum pump |
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| CN201520560782.4U CN204930362U (en) | 2015-07-29 | 2015-07-29 | Based on the vacuum conditioner of screw-type vacuum pump |
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| CN204930362U true CN204930362U (en) | 2016-01-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112120268A (en) * | 2020-09-28 | 2020-12-25 | 红塔烟草(集团)有限责任公司 | Vacuum pumping system of parallel vacuum damping machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112120268A (en) * | 2020-09-28 | 2020-12-25 | 红塔烟草(集团)有限责任公司 | Vacuum pumping system of parallel vacuum damping machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 Termination date: 20160729 |
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| CF01 | Termination of patent right due to non-payment of annual fee |