CN103891876A - Method for recycling evaporated steam generated by performing steam drying on grains and feed and other materials and equipment system thereof - Google Patents
Method for recycling evaporated steam generated by performing steam drying on grains and feed and other materials and equipment system thereof Download PDFInfo
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- CN103891876A CN103891876A CN201210585816.6A CN201210585816A CN103891876A CN 103891876 A CN103891876 A CN 103891876A CN 201210585816 A CN201210585816 A CN 201210585816A CN 103891876 A CN103891876 A CN 103891876A
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Abstract
The invention discloses a method for recycling evaporated steam generated by performing steam drying on grains and feed and other materials. The method comprises the following steps: (1) controlling the process of drying the grains and feed to be operated under micro-positive pressure, wherein the generated evaporated steam is regulated by a regulating valve group I (1) and enters a purification device (2) for washing along a pipeline; (2) obtaining regenerated steam which has the dust content of less than or equal to 5mg/kg and reaches industrial steam standard through the purification device; (3) pressurizing the regenerated steam in a compression device, increasing the pressure to be more than or equal to 0.5-0.8Mpa, raising the temperature to be more than or equal to 152 DEG C, and thus forming high-pressure steam; (4) mixing the high-pressure steam and live steam from a live steam pipe (21) into mixed steam, and allowing the mixed steam to enter drying equipment from a steam inlet (21) for drying wet materials. The method has the advantages that heat loss of air entering the equipment can be reduced, the generated evaporated steam, the discharged dust, condensate water and high-temperature steam washing water in the system can be recycled, energy conservation and emission reduction are realized, and the production cost is obviously reduced.
Description
Technical field
The present invention relates to grain and feed and process particularly Starch Production technical field.Especially a kind of method and device systems thereof that the evaporation vapour being produced with steam drying grain and feed and other material are carried out to recycle and reuse, described recovery comprises material dust, condensed water in evaporation vapour, evaporation vapour, washes the recovery of carbonated drink and heat, and recycles.
Background technology
Grain and feed are processed particularly corn flour and the dehydrated potato powder of Starch Production, and production technology is similar.Taking cornstarch as example, raw material corn will be through purifying, soak, broken, refine, sieve and wash, the operation such as separation, starch washing.The plumule that wherein broken process generates extracts oil after washing, dewater, being dried.Sieve and wash the slag crust that operation generates, through dehydration, dry, pulverizing, make fiber powder.The isolated seitan of separation circuit, through dehydration, dry, is made albumen powder.The dry tube bank machine, thermal source of all using of this three operation is 152 DEG C of above steam.Starch is dried and is used airflow machine.Thermal source is the steam of approximately 165～230 DEG C.Tube bank machine and airflow machine all belong to drying machine.Produce 1 ton of starch and produce approximately 0.4 ton of drying machine evaporation vapour.Evaporation vapour only has 100 DEG C because temperature is low at present, belongs to low-temperature heat source without use, and with dust, can only all enter atmosphere, contaminated environment.In production, drying machine is negative pressure mostly, and outside air enters in a large number, can account for 10～30% of evaporation vapour total amount, and meaningless 10～30% heats of taking away, cause energy waste.Therefore energy-conservation to process, comprises that reducing air enters and take away heat, evaporation vapour is reclaimed, dust, condensed water and the high temperature of discharge are washed to carbonated drink reclaims four aspects.Pipe bundle drier and pneumatic drier all belong to drying machine, and parameter is close, are the general drying machines that does thermal source with steam in the processing of grain and feed.
Summary of the invention
The object of this invention is to provide a kind of method and device systems thereof that the evaporation vapour being produced with steam drying grain and feed and other material are carried out to recycle and reuse, adopt this method and device systems can reduce the thermal loss that air access arrangement causes, can also wash carbonated drink recovery to dust, condensed water and the high temperature of the evaporation vapour producing in system, discharge, energy-saving and emission-reduction, obviously reduce production costs.
The present invention is by the following technical solutions to achieve the above object of the invention:
This method that the evaporation vapour being produced with steam drying grain and feed and other material are carried out to recycle and reuse, is characterized in that: it comprises the following steps:
1), the dry run of grain and feed is controlled under pressure-fired and is operated, the evaporation vapour of its generation regulates through control valve group I 1, enters purifier 2 wash along pipeline;
2), described washing is divided into two steps:
A) slightly washing: the washing carbonated drink water pump II 6 that is greater than 100 DEG C with temperature, be pressurized to 0.65Mpa, exit of pump connects a filter 39, and filter outlet connects the washing carbonated drink import 11 of purifier, enters purifier evaporation vapour is done to thick washing;
B) fine purifiation is washed: the condensed water washing producing with dry run, and condensed water flows out from condensation-water drain 25, by self overbottom pressure 0.5Mpa or after water pump III 9, enters the evaporation vapour of purifier after to thick washing wash as fine purifiation through condensed water import 10; Essence washings also can adopt outer confession to wash carbonated drink, outer confession is washed carbonated drink and is entered heater I29 by heater I import 28, heat energy or electric energy by steam or chemical energy conversion are heated to temperature more than 100 DEG C, from heater core outlet 30 enters purifier to the washing of evaporation vapour for washing carbonated drink import 27 outside purifier; Or condensed water supplements for washing carbonated drink mutually with outer, reaches the regeneration vapour of industrial steam standard to obtain dustiness≤5mg/kg;
3), regeneration vapour flows out from purifier 2 vapor outlet 14 of regenerating, the regeneration vapor inlet 18 that enters compression set 3 along pipeline through control valve group II 8 controlled pressures enters compression set, compressed device 3 pressurizations improve pressure to >=0.5～0.8Mpa, improve temperature to >=152 DEG C simultaneously, become high pressure vapour;
4) the compressed device 3 high pressure vapor outlets 19 of high pressure vapour flow out, enter high steam pressing tube 20, and become mixed steam, temperature >=152～230 DEG C of mixed steam from the raw vapor mixing of raw steam pipe 21, pressure >=0.5～0.8Mpa, enters drying equipment by air intake 21 and dries wet stock.
The dense bottom of washing carbonated drink and be positioned at purifier that evaporation vapour obtains after washing, delivers to material process as immersion water source by water pump I 5, with recovered material dust, recycle-water and recovery heat.
Described compression set adopts electric fan, compressor or steam jet ejector, or their combination.
When compression set is steam jet ejector, the raw steam inlet of injector is equipped with temperature-sensing valve group and carries out temperature control, and temperature-sensing valve group is temperature-sensing valve, electric control valve, pneumatic control valve or self-supporting temperature-sensing valve.
Steam jet ejector uses overheated vapour.
When raw steam is saturated vapor, saturated vapor enters superheater 32 through superheater import 31, the heat energy being produced by fuel combustion is heated to 200 DEG C and become overheated vapour above, goes out superheater outlet (33) and enters injector injection regeneration vapour, generates the mixed steam that reaches drying equipment requirement.
When the raw steam adopting in steam jet ejector is saturated vapor, the regeneration vapour that regeneration steam can be sent into 35,100 DEG C of heater II is heated to more than 152 DEG C, makes the mixed steam generating reach the saturated or overtemperature under mixed steam pressure.
Purifier is provided with flushing water import, rinse the mouth of a river and connect valve 7, the pressure duct after other end water pump II6 and the filter of valve, rinses the dirt mud being attached on purifier inwall and internal part, ensure cross-sectional flow area, the vapour that prevents from regenerating is by the secondary pollution of dirt mud.
Described device systems comprises: drying equipment 4, purifier 2, compression set 3, control valve group I 1, valve and pipeline, wherein, the import of purifier meets control valve group I 1, the evaporation vapor outlet of another termination drying equipment of control valve group, drying equipment import 22 connects threeway, deliver a child respectively steam pipework 21 and export the high steam pressing tube 20 being connected with compression set of two interfaces of threeway, described purifier top is provided with condensed water import 10, connect another termination of pipeline one water pump III9 of condensed water import, pump inlet connects the condensation-water drain 25 of drying equipment, the washing carbonated drink of purifier exports 16 water pump II 6 imports, exit of pump connects a filter 39, filter outlet connects the washing carbonated drink import 11 of purifier, purifier is established outer confession and is washed carbonated drink import 27, outer confession is washed carbonated drink import and is connected in series a heater I29, the dense carbonated drink water pump I 5 that washes of purifier, water pump I outlet is connected to immersion operation, the regeneration vapor outlet of purifier meets control valve group II 8, and the outlet of control valve group II 8 connects the regeneration vapor inlet 18 of compression set.
Purifier is steam jet ejector, and the import of the uperize of described steam jet ejector connects a temperature-sensing valve group, and the temperature-sensing valve group other end connects a superheater 32.
Between the outlet of control valve group II8 and the import of compression set, be connected in series a heater II 35.
Filter 39 outlets connect a valve 7, and the valve other end and flushing water import are joined.
Advantage of the present invention is: because the present invention has adopted micro-pressure operation, avoid air to enter and take away heat, reclaim again the evaporation vapour of discharge, reclaiming the material dust that evaporation carries in vapour and reclaim condensed water, wash four aspects of heat of carbonated drink and water, is energy conserving system and the method for a pressure-fired, four circulations in brief.
Pressurized operation, is by regulating exhaust valve aperture, makes wet feed entrance keep 2～30Pa pressure-fired, avoids the air system of entering to take heat out of, runs off thereby eliminate unnecessary heat.This kind is controlled in steelmaking converter off-gas recovery and successfully uses.
Reclaim evaporation vapour, to the udst separation of evaporation vapour, make its dustiness reach boiler feedwater suspension content standard≤5mg/kg, more than improving again its temperature to 152 DEG C, pressure is to more than gauge pressure 0.4Mpa, reenter drying equipment and do thermal source, replace most of or whole initial steams (claiming again raw steam).
Reclaim material dust and the condensed water taken out of of evaporation vapour, wash carbonated drink, be reclaim drying machine by enclosed condensed water as washing carbonated drink, wash carbonated drink and do and soak water or send into corn steep liquor to be concentrated dense again, the material dust as pollutant emission that evaporation vapour is taken out of is sent production line back to and is used as raw material secondary, provide immersion water and temperature for soaking operation again simultaneously, reduced for the raw quantity of steam to the heating of immersion water.
The airtight washing of pressure-fired open loop system hot water.Open loop system is constantly to have new fine purifiation carbonated drink to enter, and constantly has again the dense carbonated drink extraction out of washing, and reaches dynamic equilibrium.Airtight is that washing is carried out at closed clarifier.Hot wash, is no matter slightly to wash carbonated drink, fine purifiation carbonated drink or outer confession to wash carbonated drink, and temperature is all higher than 100 DEG C, and clarifier running temperature is greater than 100 DEG C.The washings of washing pervaporation vapour are no less than 20 minutes in the stop of clarifier bottom and precipitate, and because constantly there being condensed water to add, must have the sedimentary dense carbonated drink discharge of washing of having of equivalent.So washing process is airtight, system is opening.
The course of work is:
Purification method adopts the airtight washing of open loop system hot water, has and slightly washes and fine purifiation twice.Slightly wash with the washing carbonated drink after precipitation suspension, wash away the dust of particle diameter >=10 micron in evaporation vapour, wash the water purification that rear dust content≤10mg/kg. fine purifiation suspension content reaches industrial boiler water-supply standard 5mg/kg, the preferential steam condensate (SC) that uses drying equipment, this is the enclosed recovery of condensed water.Because condensed water is the saturated condensed water of pressure higher than 0.4Mpa, before flash of steam, water temperature is 152 DEG C of saturation temperatures, higher than evaporation stripping temperature, has ensured to wash carbonated drink temperature and has been greater than 100 DEG C, thereby reduced the condensation loss that evaporates vapour.152 DEG C of above high-temperature condensation waters enter clarifier by having an appointment 10% condensed water flash vaporization, mix generation mass-and heat-transfer, strengthened purification effect with evaporation vapour.Also can use outer watering, strengthen the fine purifiation water yield, or increase washing together, Ji tri-road washings.But need be heated to >=110 DEG C.Ensure that purification process completes above at 100 DEG C.After fine purifiation, evaporate vapour dust content≤5mg/kg, become the regeneration vapour that meets Industrial Boiler quality of steam standard.
Because water temperature is higher, detersive efficiency is also higher; Steam temperature height can reduce condensation loss, is also pressure-fired so wash steam pressure.And vapour operating pressure >=100～500Pa is washed in available pressure regulator valve group (8) control.Also can adopt the methods such as sedimentation, centrifugal and filtration to the thick dedusting of evaporation vapour.Thick cleaner can with being made of one of clarifier equipment, also can separate independent or integral production.
The washings of washing pervaporation vapour are no less than 20 minutes in the stop of clarifier bottom and precipitate, and precipitation rear lower becomes the dense carbonated drink of washing, and top is washing carbonated drink.Also available filtration improves the cleanliness factor of washing carbonated drink.Densely wash carbonated drink and taken away and deliver to immersion operation by the dense steam water pump of washing, wash carbonated drink and be recycled utilization.Washing carbonated drink is retracted to clarifier top by washing steam water pump evaporation vapour is done to thick washing.Because constantly having condensed water to add, what must have equivalent densely washes carbonated drink discharge.So be to wash in confined conditions, but belong to open loop system.
Flushing water is taken from washing steam water pump export pipeline, by setup program or manual control switch control and make flushing water enter clarifier by flushing water import the dirt mud being attached on clarifier inwall is rinsed, ensure cross-sectional flow area, the vapour that prevents from regenerating is secondary polluted.
To the insulation of pipeline and tank body, make to evaporate vapour, the vapour and wash carbonated drink temperature and keep more than 100 DEG C, reducing to greatest extent condensation loss of regenerating.
That reclaims densely washes carbonated drink and contains the material dust taken out of of evaporation vapour, and simultaneous temperature, higher than 100 DEG C, is applicable to doing immersion water very much, not only recovered material, and immersion water source is provided, more valuable than water is 100 DEG C of coolant-temperature gages, reduces or does not re-use raw steam to soaking water heating.It is energy-conservation reclaiming heat, and recovered material also has energy-saving significance.
Initial steam and evaporation vapour, regeneration vapour cycle transform, and have completed the circulation of steam.
The condensed water closed type of drying machine is reclaimed as fine purifiation carbonated drink, wash carbonated drink and give immersion operation dense, the recovery that has completed condensed water simultaneously and washed carbonated drink and heat thereof.Water and heat be too many levels circulation in production system, can treat as and recycle.
The dense material dust of washing in carbonated drink is given to soak and is got back to operation before production line, has completed recovery and the circulation of material dust
Due to the thermal loss of having avoided air to take away, the latent heat that accounts for the total Nem 80% of steam recycles, and the material of discharge and the heat of water are recycled, and considers after various losses, and drying machine also can save new (life) steam more than 60%, soaks energy-conservation more than 60%.
Compression set has regeneration vapor inlet and high pressure vapor outlet.Use one or the combination of electric fan, compressor and steam jet ejector, one or more levels does and compresses regeneration vapour, regeneration vapour enters compression set from the regeneration vapor inlet of compression set, after compressed device compression, improve pressure and temperature and become high-pressure and high-temperature steam, temperature >=152 DEG C, pressure >=0.4Mpa, enters high steam pressing tube from compression set outlet.Become mixed steam with the raw vapor mixing of carrying out spontaneous steam pipe.Temperature >=152 DEG C of mixed steam, pressure pressure >=0.4Mpa, reaches drying machine instructions for use, enters two thermal source drying machines remove to dry wet stock through two thermal source drying machine air intakes.
Enthalpy-entropy diagram and water vapour thermodynamic property table from steam: when 100 DEG C of saturated vapors by isentropic Compression to gauge pressure 0.4Mpa, temperature is raised to 152 DEG C.Enthalpy is increased to 656 kilocalories/kg from 638 kilocalories/kg.Adopt level Four centrifugal compressor or stage piston-type compressor or multistage axial flow and centrifugal mixed flow fan to realize easily.Needed isentropic compression work is
656 kilocalories/kg-638 kilocalorie/kg=18 kilocalorie/kg
Because actual compression is non-isentropic Compression, getting isentropic efficiency is 90%, and the work done during compression needing is 18 ÷ 0.90=20 kilocalorie/kg.
Merit thermal conversion rate is 1kw=860 kilocalorie, closes electrical power
20 kilocalories/kg ÷, 860 kilocalories/kw=0.02326kw/kg
The saturated vapor that compresses 1 ton 100 DEG C needs power
0.02326kw/kg×1000kg/t=23.26kw/t
100 DEG C of saturated vapor latent heat 539 kilocalories/kg, i.e. recyclable latent heat 539 kilocalories of every recovery 1kg evaporation vapour.Getting organic efficiency is 90%, can obtain heat
539 kilocalories/kg × 90%=485 kilocalorie/kg
Electric energy drops into and output ratio is
23.26：485=1：20.85
Known input and output is than being very high.
Owing to dropping into 1 part of work done during compression, obtain the heat of 20.85 times, so use compression device compressed steam, be a kind of high-efficiency heat pump.
For ensureing that secondary pollution does not occur compression process, if use piston compressor should use oilless (oil free) compressor.Oilless (oil free) compressor on market is substantially applicable.If using centrifugal compressor and axial flow and centrifugal blower itself is exactly without oil machine.
In the time using steam jet ejector, initial steam (raw steam) enters injector from raw steam inlet, regeneration vapour enters injector from regeneration vapor inlet, compresses and be blended in injector to complete, and pressure and temperature when mixed steam goes out high pressure vapor outlet just reaches drying machine vapour standard.To only having the enterprise of saturated raw steam, if use injector need to fill steam superheater, raw Steam Heating is become to overheated vapour, or with heater regeneration vapour be heated to 152 DEG C and more than, restrain or 152 DEG C of airflow machine throttle (steam) temperatures to ensure that mixed steam coolant-temperature gage reaches.
Use steam jet ejector fashionable dress outlet temperature control device.In the time that the flow of raw steam and regeneration vapour or parameter change, regulate the flow of raw steam, what the temperature and pressure that ensures mixed steam met drying machine uses vapour standard.
On evaporation vapor outlet pipeline, control valve group I 1 is housed, its pressure transmitter is loaded on evaporation vapor outlet or wet feed import, is loaded on wet feed import and removes the limit, and is loaded on evaporation vapor outlet and gets high value.
Brief description of the drawings
Fig. 1: be device systems figure of the present invention
Fig. 2: with the temperature automatically controlled steam jet ejector schematic diagram of control valve special
In Fig. 1 and Fig. 2,1, control valve group I, 2, purifier, 3, compression set, 4, drying equipment, 5, water pump I, 6, water pump II, 7, valve, 8, control valve group II, 9 water pump III, 10, condensed water import, 11 washing carbonated drink imports, 12, evaporation vapor inlet, 13, flushing water import, 14, regeneration vapor outlet, 15, dense carbonated drink outlet, 16 washed, the outlet of washing carbonated drink, 17, raw steam inlet, 18, regeneration vapor inlet, 19, high pressure vapor outlet, 20, high steam pressing tube, 21, raw steam pipe, 22 steam inlets, 23, wet feed import, 24, evaporation vapor outlet, 25, condensation-water drain, 26, drier outlet, 27, carbonated drink import, 28 are washed in outer confession, heater I import, 29, heater I, 30I heater I outlet, 31, superheater import, 32, superheater, 33, superheater outlet, 34 heater II imports, 35 heater II, 36 heater outlets, 37, fixed gas self-draining valve 38, fixed gas floss hole 39, filter 40, filter II import 41, filter outlet 42, temperature-sensing valve import 43, temperature-sensing valve 44, temperature-sensing valve outlet 45, executing agency, 46, superheater chamber, 47 aciculiform spools, 48, nozzle.49, mixing chamber, 50, diffuser, 51, intelligent controller, 52 Folding-Screen cover wire, 53 transmitters, 54, probe, 55, outlet conduit, 56, initial steam import, 57, regeneration vapor inlet.
Detailed description of the invention
As shown in Figure 1, control valve group I 1 changes aperture control drying machine wet feed import pressure-fired 2～30Pa according to the pressure signal in the drying machine (pipe bundle drier) detecting, and takes heat out of after avoiding air to enter.Evaporation vapour through export 24 and control valve group I 1 enter purifier 2 along pipeline through air intake 12 and be washed.Mode of washing has water admire and spray, and washing direction has crossing current, adverse current, following current, in any case stream and perverse and unreasonable manner stream.
Temperature is greater than the washing carbonated drink of 100 DEG C and is pressurized to 0.65Mpa by water pump II 6 and enters clarifier through the washing carbonated drink import 11 of purifier 2 evaporation vapour is done to thick washing, steam weight ratio >=5:1, because of the about 10m/s of evaporation vapour flow velocity in equipment, steam velocity ratio is 3.4:1, makes be down to≤10mg/kg of its dustiness.
The condensed water that drying machine produces flows out by self overbottom pressure 0.5Mpa from condensation-water drain 25, can enter clarifier 2 through condensed water import 10 the evaporation vapour after slightly washing is washed as fine purifiation.Strengthen clean result for improving pressure, with pump III9 to condensed water pressurization raising pressure as brought up to 0.65Mpa, enter clarifier and the evaporation vapour after slightly washing is done to fine purifiation wash.
Because drying machine steam consumption is 1.3 times of evaporation capacity, technological design determines Water Vapor Quality than being 1.3:1.The water spouting velocity of 0.4Mpa pressure is 28m/s, and velocity ratio is 2.8:1.In actual production, drying machine vapour pressure is greater than 0.4Mpa, mostly is 0.5～0.8Mpa, 159 DEG C of 0.5Mpa condensate temperatures, condensed water temperature is higher than 59 DEG C of evaporation vapour, 10% the condensed water of having an appointment in washing will be vaporized, and washing process is also mass-and heat-transfer process, greatly strengthens clean result.
Also the available pump III9 raising spouting velocity of further pressurizeing, strengthens clean result.Fine purifiation is washed rear be down to≤5mg/kg of evaporation vapour dustiness, reaches Industrial Boiler steam standard, becomes regeneration vapour.
Dustiness≤5mg/kg reaches the regeneration vapour of industrial steam standard, flow out from clarifier 2 vapor outlet 14 of regenerating, enter compression set 3 vapor inlet 18 of regenerating along pipeline and enter 3 pressurizations of the compressed device of compression set and improve pressure to improve temperature and arrive >=152 DEG C with the raw steam 0.4～0.8Mpa that maintains an equal level simultaneously, become high pressure vapour; Compressed device 3 high pressure vapor outlets 19 flow out and enter high steam pressing tube 20, become mixed steam with the raw vapor mixing of managing 21 from raw steam (initial steam), temperature >=152～230 DEG C of mixed steam, pressure >=0.4～0.8Mpa, meet two thermal source drying machine vapour standards, enter drying machine by air intake 22.Wet stock enters drying machine through wet feed import 23, carries out heat exchange with mixed steam, and the latent heat of condensation that the moisture absorption mixed steam in wet stock discharges and the rising of part sensible heat temperature convert the latent heat of vaporization of moisture to and vaporize, and become evaporation vapour.Go out to evaporate vapor outlet 23, enter purifier 2 along pipeline through evaporation vapor inlet 12 through pressure regulator valve group 1 and be cleaned.
In the time using steam jet ejector, raw steam is injector raw (newly) from compression set) steam inlet 17 entrance pressure compression apparatus are injector 3, pressure energy is converted to kinetic energy, pressure decreased is to negative pressure, be the regeneration vapour entrance 18 inspiration injectors of injector 3 the compressed device of regeneration vapour, the two mixes, and with the increase of pipeline section, diffusion is to drying machine use vapour normal temperature >=152 DEG C again, and the high steam pressing tube 20 that pressure >=0.4Mpa. is compression set outlet 19 through injector enters dryer cycle utilization with drying machine steam inlet 22.
The carbonated drink of washing of washing pervaporation vapour stops and is no less than 20 minutes and precipitates in clarifier 2 bottom, because of constantly there being condensed water to add, must have the sedimentary dense carbonated drink discharge of washing of having of equivalent.So be to wash under airtight condition in open loop system.Be that washing process is airtight but system is opening.Have and sedimentaryly densely wash carbonated drink and wash carbonated drink outlet 15 from clarifier bottom dense and extracted out to send to by water pump I 5 and do to soak water or other purposes, material dust, water and heat are recovered simultaneously, realize recycling of material, water and heat.The washing carbonated drink of clarification is flowed out from clarifier portion on the upper side, and water pump II 6 pressurizes and enters clarifier through washing carbonated drink entrance 11 again evaporation vapour is slightly washed.
The condensed water of drying machine is by self overbottom pressure or again through water pump III9 pressurization, enters clarifier the evaporation vapour after slightly washing is done to fine purifiation wash by clarifier condensed water import 10.So new smart washings constantly enter, and evaporation vapour is washed continuously, and the dust washing and wash carbonated drink with smart washings equivalent dense that enters clarifier and constantly discharge again clarifier reaches dynamic equilibrium, has ensured again the cleannes of washing carbonated drink.And the dust washing is corn or dehydrated potato powder etc., be not as pollutant emission, but the headend equipment of getting back to again system is reused as raw material.
Immersion needs water, and is hot water, and the higher soak time of temperature is shorter, and productivity ratio is higher.Use normal temperature new water both to need water resource again by raw Steam Heating, therefore reclaim and use dense wash carbonated drink not only the heat of material dust He Shui and water be recycled and recycle, and boost productivity.Therefore be Steam Recovery, material dust reclaims, condensed water and four recovery of heat recovery of washing carbonated drink can be described as " two water " and water, and four circulations of heat of the latent heat of steam, particulate dust, " two water " and " two water ", one action four must.
Flushing water is taken from the pressure duct after water pump II, and valve 7 by setup program or Artificial Control washing time and the water yield, rinses the dirt mud being attached on clarifier inwall and internal part, ensures cross-sectional flow area, and the vapour that prevents from regenerating is by the secondary pollution of dirt mud.
Outer for washing carbonated drink when using, comprise and use the outer deficiency of washing carbonated drink or supplementary condensed water of supplying completely, or wash carbonated drink Zuo tri-road slurries with outer confession, or increase the amount Zuo tri-road washings again of condensed water, increase heater 29.Outer confession is washed carbonated drink and is washed carbonated drink import 28 by outer confession and enter heater, and the heat energy or the electric energy that are transformed by steam or chemical energy are heated to temperature more than 100 DEG C, and from heater core outlet 30 enters clarifier evaporation vapour is washed for washing carbonated drink import 27 through clarifier outside.
Embodiment 3 use steam jet ejector but without cross hot vapour source
When raw vapour source is saturated vapor, the mixed steam of injector outlet can not reach the admission standard of drying machine.Must saturated vapor be heated into overheated vapour with steam superheater.Saturated vapor enters superheater 32 through superheater import 31, and being heated to 200 DEG C by fuel combustion generation and heat energy becomes overheated vapour above, goes out superheater outlet 33 and enters injector injection regeneration vapour, generates the mixed steam that reaches drying machine requirement.
The another program of dealing with problems is to establish heater II 35 the regeneration vapour of 100 DEG C is heated to above to 152 DEG C, makes the mixed steam generating reach the saturated or overtemperature under mixed steam pressure.Be heated to the pressure of how many temperature depending on the saturated vapor source of use.
From the vapour heater II import 34 of entering to regenerate of the regeneration vapour of clarifier 2, be heated to necessary temp by fuel, from heater core II outlet 36, enters injector regeneration vapor inlet 18, mixes diffusion again with injection saturated vapor, generates mixed steam for drying machine.
For ensureing that mixed steam parameter meets drying machine requirement all the time when jetting steam caused and the regeneration vapour parameter fluctuation, in injector import dress temperature-sensing valve group.Controlling general principle is to regulate initial steam consumption with temperature-sensing valve.According to control valve difference, there are three kinds of Special temperature-sensing valve, electronic or pneumatic control valve and self-supporting temperature-sensing valves, taking Special temperature-sensing valve as example:
As shown in Figure 2, at outlet conduit, temp probe 54 and transmitter 53 are housed, the 54 perception injector outlet steam temperatures of popping one's head in, transmitter 53 converts 4～20mA current signal or voltage signal or resistance signal to temperature signal and passes to intelligent controller 51 through shielding line 52, controller can adopt intelligent digital temperature controller, as WP220.Temperature controller sends instruction according to received electric current or voltage or resistance signal to regulating-valve actuator 45, and executing agency 45 changes and the gap of nozzle 48 according to instruction moving valve core 47, thereby changes superheated steam amount.When mixed vapour temperature is lower than setting value as 151 DEG C, tube bank machine, spool is moved to the left to the superheated steam amount that strengthens.Too high when vapor (steam) temperature, spool is moved right and reduces overheated vapour amount.
Electronic, pneumatic control valve is basic identical at temp probe, transmitter and intelligent controller and Special temperature-sensing valve.Difference is at the valve body of executing agency.The closing element of control valve is valve plate instead of aciculiform spool.
The sensor of self-supporting temperature-sensing valve is the liquid expanding with heat and contract with cold, and changes and directly changes valve opening with probe sense temperature, is not equipped with intelligent meter, without electrical source of power.
Claims (12)
1. a method of the evaporation vapour being produced with steam drying grain and feed and other material being carried out to recycle and reuse, is characterized in that: it comprises the following steps:
1), the dry run of grain and feed is controlled under pressure-fired and is operated, the evaporation vapour of its generation is through control valve group I(1) regulate, enter purifier (2) washing along pipeline;
2), described washing is divided into two steps:
A) slightly washing: the washing carbonated drink water pump II(6 that is greater than 100 DEG C with temperature), be pressurized to 0.65Mpa, exit of pump connects a filter (39), and filter outlet connects the washing carbonated drink import (11) of purifier, enters purifier evaporation vapour is done to thick washing;
B) fine purifiation is washed: the condensed water washing producing with dry run, condensed water flows out from condensation-water drain (25), by self overbottom pressure 0.5Mpa or through water pump III(9) after, enter the evaporation vapour of purifier after to thick washing through condensed water import (10) and wash as fine purifiation; Essence washings also can adopt outer confession to wash carbonated drink, outer confession is washed carbonated drink and is entered heater I(29 by heater I import (28)), heat energy or electric energy by steam or chemical energy conversion are heated to temperature more than 100 DEG C, from heater core outlet (30) enters purifier to the washing of evaporation vapour for washing carbonated drink import (27) outside purifier; Or condensed water supplements for washing carbonated drink mutually with outer, reaches the regeneration vapour of industrial steam standard to obtain dustiness≤5mg/kg;
3), regeneration vapour flows out from purifier (2) regeneration vapor outlet (14), through control valve group II(8) the controlled pressure regeneration vapor inlet (18) that enters compression set (3) along pipeline enters compression set, compressed device (3) pressurization improves pressure to >=0.5～0.8Mpa, improve temperature to >=152 DEG C simultaneously, become high pressure vapour;
4) the compressed device of high pressure vapour (3) high pressure vapor outlet (19) flows out, enter high steam pressing tube (20), become mixed steam with the raw vapor mixing of coming from raw steam pipe (21), temperature >=152～230 DEG C of mixed steam, pressure >=0.5～0.8Mpa, enters drying equipment by air intake (21) and dries wet stock.
2. the method for recycle and reuse according to claim 1, it is characterized in that: the dense bottom of washing carbonated drink and be positioned at purifier that evaporation vapour obtains after washing, by water pump I(5) deliver to material process as immersion water source, with recovered material dust, recycle-water and recovery heat.
3. the method for recycle and reuse according to claim 1, is characterized in that: described compression set adopts electric fan, compressor or steam jet ejector, or their combination.
4. the method for recycle and reuse according to claim 3, it is characterized in that: when compression set is steam jet ejector, the raw steam inlet of injector is equipped with temperature-sensing valve group and carries out temperature control, and temperature-sensing valve group is temperature-sensing valve, electric control valve, pneumatic control valve or self-supporting temperature-sensing valve.
5. the method for recycle and reuse according to claim 4, is characterized in that: steam jet ejector uses overheated vapour.
6. the method for recycle and reuse according to claim 4, it is characterized in that: when raw steam is saturated vapor, saturated vapor enters superheater (32) through superheater import (31), the heat energy being produced by fuel combustion is heated to 200 DEG C and become overheated vapour above, go out superheater outlet (33) and enter injector injection regeneration vapour, generate the mixed steam that reaches drying equipment requirement.
7. the method for recycle and reuse according to claim 4, it is characterized in that: when the raw steam adopting in steam jet ejector is saturated vapor, regeneration steam can be sent into heater II(35), the regeneration vapour of 100 DEG C is heated to more than 152 DEG C, makes the mixed steam generating reach the saturated or overtemperature under mixed steam pressure.
8. the method for recycle and reuse according to claim 1, it is characterized in that: purifier is provided with flushing water import, rinse the mouth of a river and connect valve (7), the other end water pump II(6 of valve) and filter after pressure duct, flushing is attached to the dirt mud on purifier inwall and internal part, ensure cross-sectional flow area, the vapour that prevents from regenerating is by the secondary pollution of dirt mud.
9. the device systems for recycle and reuse method described in claim 1, it is characterized in that: it comprises: drying equipment (4), purifier (2), compression set (3), control valve group I (1), valve and pipeline, wherein, the import of purifier meets control valve group I(1), the evaporation vapor outlet of another termination drying equipment of control valve group, drying equipment import (22) connects threeway, deliver a child respectively steam pipework (21) and export the high steam pressing tube (20) being connected with compression set of two interfaces of threeway, described purifier top is provided with condensed water import (10), connect another termination of pipeline one water pump III(9 of condensed water import), pump inlet connects the condensation-water drain (25) of drying equipment, washing carbonated drink outlet (16) water pump II(6 of purifier) import, exit of pump connects a filter (39), filter outlet connects the washing carbonated drink import (11) of purifier, purifier is established outer confession and is washed carbonated drink import (27), outer confession is washed carbonated drink import and is connected in series a heater I(29), the dense carbonated drink water pump I(5 that washes of purifier), water pump I outlet is connected to immersion operation, the regeneration vapor outlet of purifier meets control valve group II(8), control valve group II(8) outlet connect the regeneration vapor inlet (18) of compression set.
10. device systems according to claim 9, is characterized in that: purifier is steam jet ejector, and the import of the uperize of described steam jet ejector connects a temperature-sensing valve group, and the temperature-sensing valve group other end connects a superheater (32).
11. according to claim 9 device systems, it is characterized in that: control valve group II(8) outlet and the import of compression set between be connected in series a heater II(35).
12. device systems according to claim 9, is characterized in that: filter (39) outlet connects a valve (7), and the valve other end and flushing water import are joined.
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| CN201210585816.6A CN103891876B (en) | 2012-12-28 | 2012-12-28 | The evaporation vapour produced with steam drying Fodder and food and other material are carried out to method and the device systems thereof of recycle and reuse |
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| CN113080369A (en) * | 2021-05-09 | 2021-07-09 | 曲阜市圣儒食品有限公司 | Flour steam crisp-opening process method for cakes |
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Application publication date: 20140702 Assignee: BEIJING TIANLAN HUAXING ENERGY TECHNOLOGY CO., LTD. Assignor: BEIJING TIANDA JINGFENG TECHNOLOGY DEVELOPMENT CO., LTD. Contract record no.: 2018110000011 Denomination of invention: Method for recycling evaporated steam generated by performing steam drying on grains and feed and other materials and equipment system thereof Granted publication date: 20160120 License type: Exclusive License Record date: 20180330 |