CN102249055B - Recycling process of hot and humid air generated in wheat processing - Google Patents

Recycling process of hot and humid air generated in wheat processing Download PDF

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CN102249055B
CN102249055B CN 201110051664 CN201110051664A CN102249055B CN 102249055 B CN102249055 B CN 102249055B CN 201110051664 CN201110051664 CN 201110051664 CN 201110051664 A CN201110051664 A CN 201110051664A CN 102249055 B CN102249055 B CN 102249055B
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wheat
damp
arm
heat air
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任光利
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Abstract

The invention relates to a recovery process of energy and materials generated in wheat processing, and provides a recycling process of hot and humid air generated in wheat processing, which is used for adjusting moisture and temperature of wheat. In the process, the hot and humid air generated in procedures such as a production or domestic boiler of a wheat processing enterprise, pneumatic transmission in a production workshop, bran drying, food processing and the like is separately conveyed to wheat bind or conveyed to the bins after being collected and mixed, and then wheat in a wheat wetting bin or clean wheat bin is heated and humidified. By utilizing the recycling process, the energy is utilized maximally so as to realize cyclic economy, wheat wetting time is shortened, bin capacity is reduced, and meanwhile product quality and flour yield are improved.

Description

A kind of wheat processing process damp-heat air reuse technology
Technical field
The present invention relates to the damp-heat air reuse technology that produces in a kind of wheat processing process, particularly the damp-heat air that reclaims is applied to wheat water content and thermoregulator technique.
Background technology
At flour mill, the wheat processing technological process mainly comprises wheat cleaning, moisture adjusting, wheat milling, clear powder and the operations such as screen, product-collecting and packing.Wherein, material must be promoted to square plansifter and carries out screen through air-transport system behind the wheat milling.The damp-heat air that process of pneumatic transmission produces in the prior art after being transferred material and separating, directly enters atmosphere through pulse filter.
In the wheat milling process, for satisfying the flouring technology needs, the moisture distribution ratio of wheat cortex and endosperm is generally 1.1-1.5: 1, and the wheat bran moisture requirement is equal to or less than flour moisture, in order to satisfy simultaneously wheat flour milling technique and wheat bran moisture requirement, generally take to be undertaken after moisture regulates by the flouring technology requirement, reduce again the moisture of wheat bran by the drying wheat bran system.And the damp-heat air that existing drying wheat bran system produces after wheat bran separates, directly enters atmosphere through pulse filter.
At flour mill, generally all have several vermicelli (or instant noodles, steamed bun, food) manufacturing line, the damp-heat air that oven dry (or steaming) process produces directly enters atmosphere.
The damp-heat air that above link produces, because moisture wherein and heat all are difficult to utilize under prior art and conventional thought, generally not can take into account recycling, existing installation technique does not possess the reuse condition yet, this has just caused the waste of a large amount of heat energy and moisture, the product that the while part producing goes out such as flour etc. also can be discharged thereupon, cause unnecessary waste, therefore how to utilize now this resource to become problem demanding prompt solution.
In the wheat flour milling process, in order to improve flour quality and flour extraction, reduce the mill processes consumption of power, need to carry out moisture after wheat is once cleared up and regulate.Existing moisture regulative mode, the general wheat that adopts adds behind the water method of wheat wetting (leave standstill and deposit) in wheat bin, to realize that moisture evenly distributes in wheat seed, according to wheat quality, ambient temperature and humidity and capacity condition, the general 18-48 of tempering time hour.The technological requirement that is higher than endosperm moisture for satisfying wheat cortex moisture, generally once spraying after the secondary cleaning adds water again.
In the winter time, the early spring, season in late autumn because cold weather, moisture is difficult to infiltration, fully permeates and is evenly distributed in order to guarantee the wheat endosperm internal moisture, tempering time needs greatly to prolong; Simultaneously, the environmental drying in this season causes the wheat cortex to be lower than endosperm moisture because of water loss, enters the front spray damping of mill processing and can not fully absorb in the short time again, is attached to the wheat surface, does not have due effect.Some flour mill adopts wheat bin to add the moisture adjusting that the methods such as (guarantor) temperature, wheat intensification, heating water are carried out wheat for the impact of reduce ambient temperature and humidity on the powder process effect.Build and equipment investment but these methods not only increase, and need to consume mass energy increase productive costs.
Because ambient temperature is low, wheat cortex toughness drop, with process that endosperm separates in easily broken, not only increased operation easier, and affect wheat flour milling system balance and product design, the increase energy consumption.
Summary of the invention
The waste of the many drawbacks that exist for prior art and the resource of bringing, the invention provides a kind of wheat processing process damp-heat air reuse technology and be used for wheat water content and adjustment, it is the damp-heat air that the operations such as the production of wheat processing enterprise or boiler for domestic, the conveying of workshop strength, drying wheat bran, food processing are produced, be transported to wheat bin separately or after collecting mixing, wheat in wheat wetting storehouse or the clean wheat bin is carried out the technique of heating and moistening, after adopting this technique, realized maximum using and the recycling economy of energy; Shorten the required time of wheat wetting, reduced capacity; Improve quality and the flour extraction of product, reduced energy consumption.
Concrete technical scheme of the present invention is: after adopting the collection mixer to collect the damp-heat air in the wheat processing process, adopt manifold trunk and the arm that puts in storage to be back in the wheat bin wheat is carried out heating and moistening;
More specifically, be with the damp-heat air in the wheat processing process by collect mixer collect mix after, enter manifold trunk and the arm that puts in storage, and finally be back in the wheat bin by dispensing branch wheat is carried out heating and moistening;
Damp-heat air in the described wheat processing process derives from the damp-heat air that contains a small amount of dust that workshop strength conveying wind net is discharged;
Or the drying wheat bran system damp-heat air that contains a small amount of dust of discharging;
Or food production line, dry or steam the wet-hot steam that process is discharged;
Or above-mentioned compound.
Wherein, damp-heat air source in the wheat processing process that adopts, mainly considered easily to produce in each production technology of existing wheat processing enterprise damp-heat air, and easily produce the production process of damp-heat air waste, with the damp-heat air that wherein produces, after collecting and regulate its wind speed air quantity by independent gathering-device, be back in the wheat bin by the arm that puts in storage, wheat is carried out heating and moistening.Except above-mentioned damp and hot resource, the wet-hot steam that can also adopt enterprise's production or the used heating system of living to discharge, thus realize the maximized utilization of resource and recycling economy.
Concrete scheme is as follows:
With former damp-heat air or the steam that enters atmosphere of above-mentioned operation, after collecting mixer collection mixing, enter manifold trunk, consistent for guaranteeing in arm that each position of manifold trunk picks out and the manifold trunk wind speed everywhere, the diameter of manifold trunk does not wait, end diameter is minimum, and its terminal top diameter is slightly larger than the arm diameter that puts in storage, and is generally 120-350mm.Wind speed generally is equal to or less than former wind net outlet wind speed at 10-20m/s in the manifold trunk.When being higher than former wind net outlet wind speed, can affect the working stability of former wind net because of resistance increment; Cross when low when wind speed, because bite is excessively low, affect the heating and moistening effect.
According to position, quantity and the specification of wheat bin, opening picks out the arm that puts in storage in the relevant position of manifold trunk.The diameter of arm of putting in storage is determined according to the specification of manifold trunk and calculation of parameter, diameter is generally 80-300mm, wind speed is determined concrete parameter than the mode that passes into that in addition the low 2-10m/s of manifold trunk wind speed also needs to look the arm that puts in storage in the pipe, the arm that puts in storage can pass at the bottom of Cang Ding or storehouse, and concrete length is determined according to the wheat bin height; Carry or during the damp-heat air of drying wheat bran operation, general preferred employing passes into the mode of wheat bin from Cang Ding when independent use workshop strength, generally 0.5-1m at the bottom of the storehouse of arm bottom puts in storage when adopting this mode; When the damp-heat air outside the use workshop, general preferred employing passes into the mode of wheat bin at the bottom of the storehouse, put in storage when adopting this mode the arm top apart from the storehouse at the bottom of 0.3m-push up 2m apart from the storehouse, when adopting this mode, also can select dispensing branch is not set, the arm that only needs to put in storage directly passes at the bottom of the storehouse, make its top apart from the storehouse at the bottom of 1-2m get final product, can directly realize like this rising diffusion that damp-heat air is self-service, reduce cost; Pass into no matter select from Cang Ding or at the bottom of the storehouse, wind speed still hangs down 2-10m/s than manifold trunk wind speed in the arm pipe that puts in storage.
In order to make damp-heat air fully diffusion in wheat bin, on the arm that puts in storage, pick out some dispensing branch by different spread patterns, wherein the spread pattern of dispensing branch: spiral, single row type, double-row type, many rows formula.Have when double-row type or many rows formula and just be listed as and two kinds of stagger arrangement;
The diameter of dispensing branch is according to the diameter calculative determination of the arm that puts in storage, and diameter is generally 80-150mm, and wind speed is at 1-6m/s in the pipe.
The length of dispensing branch is definite according to the sectional area of wheat bin, is heated evenly everywhere with wheat bin to be as the criterion.
The quantity of dispensing branch is definite according to the height of wheat bin, and two arm perpendicular separations are that 500-2000mm is advisable.
Dispensing branch is the 20-70 degree with the angle of arm of putting in storage, fully damp-heat air being sent into wheat bin so that in the wheat bin wheat of each position can both fully obtain damp and hot, thereby realize balanced the distribution, improve quality and the flour extraction of product, Reduction of power consumption.
Arm and dispensing branch directly enter wheat bin owing to putting in storage, directly contact with wheat, and need to carry damp-heat air, therefore need to select especially anticorrosion, antirust, wear-resisting, free of contamination material, generally can adopt stainless steel tube, galvanized pipe, galvanized iron pipe, non-toxic plastic pipe etc.
Damp-heat air is transported to each arm through collecting the mixer distribution, except regulating the air quantity by regulating the arm diameter, can also adjust intake by arm inlet adjusting valve, on the collection mixer, also be connected with external heat source or humidification source simultaneously, like this when the damp and hot resource of above-mentioned circulation can not satisfy heating and moistening and requires, can by collecting mixer, use external heat (wetting) source to replenish, to satisfy the requirement of technique.Simultaneously, collecting mixer can be dynamic impeller adding pressure type (induced draft fan of respective model for example is installed), does not affect in assurance on the basis of leading portion normal operation, regulates accurately and effectively the back segment working parameter.
For collecting mixer, can directly adopt the positive displacement of not establishing impeller, independent recovery bin namely, it can also be above-mentioned dynamic impeller adding pressure type, specifically can adopt the vane type recovery bin of establishing impeller, by vane rotary, damp-heat air direct absorption from the discharging system of each operation come.According to actual needs, turbomixer is divided into: Powerless mixes and dynamic pressurization mixes two kinds.For guaranteeing leading portion working stability and last part technology effect, should collect mixer by first-selected dynamic impeller adding pressure type, in the situation that leading portion operation storage level is large, the damp and hot source category of need collection is less, fed distance is shorter, the wheat bin negligible amounts, can adopt positive displacement or unpowered vane type to collect mixer.
After adopting this technique, obtained following effect:
1. the damp-heat air of the operations generations such as enterprise's boiler, strength conveying, drying wheat bran, food processing does not efflux, and regulates operation but be back to wheat processing moisture, to the interior wheat heating and moistening in wheat wetting storehouse (or clean wheat bin), realizes recycling economy.
2. the damp-heat air malleation is transported to each position of wheat bin, accelerates the distribution of moisture between wheat seed inside and dung heap, shortens tempering time, saves capacity.
3. strengthen the toughness of wheat cortex, make that wheat endosperm is easier to be peeled off with cortex, reduce pulverizing process to the fragmentation of wheat cortex, Reduction of power consumption improves the quality of products and flour extraction.
4. drying wheat bran, strength are carried that contained a small amount of flour filters in the damp-heat air of discharging, sedimentation is reclaimed, both reduced directly entering the environmental pollution that causes in the atmosphere, the resource of saving food again increases social benefit and Business Economic Benefit.
Description of drawings
Fig. 1 is that the wheat processing process damp-heat air reuse technology of the present invention arm Cang Ding that puts in storage passes into schematic diagram;
Fig. 2 is that wheat processing process damp-heat air reuse technology of the present invention puts in storage and passes into schematic diagram at the bottom of the arm storehouse;
Fig. 3 is manifold trunk and a structural representation that reaches dispensing branch that puts in storage;
Fig. 4 is the manifold trunk structural representation that is provided with behind the impeller;
1 is the wheat wetting storehouse among the figure, and 2 is clean wheat bin, and 3 is pulse dust collector, and 4 is blower fan, and 5 is temperature booster, 6 is feeder, and 7 is discharger, and 8 is the strength conveying wind net, and 9 for collecting mixer, and 10 is manifold trunk, 11 is regulating butterfly valve, and 12 are the arm that puts in storage, and 13 is dispensing branch, and 14 is impeller;
A is the strength conveying wind net, and B is drying wheat bran wind net.
The specific embodiment
Embodiment 1
A kind of wheat processing process damp-heat air reuse technology, its processing step following (with 200 tons of day processing wheats, the wheat wetting storehouse of 4 3m * 3m * 18m, 1 diameter 2m, the clean wheat bin of high 3m, 1 group of conveying wind net is the example explanation):
1. with the former damp-heat air that enters atmosphere of strength conveying wind net, (this mixer adopts dynamic impeller adding pressure type to be changed into collection mixer 9, power disposition 5.5kw), then enter manifold trunk 10 (the diameter at butt end 600mm of manifold trunk, top diameter 200mm, length 12m), wind speed 16m/s in the pipe;
2. corresponding position on the manifold trunk in 1 centre, wheat wetting storehouse, opening picks out the arm 12 that puts in storage.The put in storage diameter 150mm of arm, length 17m, wind speed 12m/s in the pipe arranges regulating butterfly valve 11 in the position of the place's of putting in storage convenient operation;
3. pick out 11 dispensing branch 13 by spiral on the arm that puts in storage, dispensing branch 13 is 60 degree with the angle of the arm 12 that puts in storage, the length 1m of dispensing branch 13, two arm angles, 90 degree, spacing 1.5m, the about 3-4m/s of wind speed in the pipe;
4. result's test: 8 ℃ of workshop condition temperature, humidity 20%; 29 ℃ of wind net air outlet temperature, humidity 56%; Behind 30 hours wheat wettings, it is as follows that leading indicator detects comparative result respectively:
Known by table: after adopting the technology of the present invention, the leading indicators such as Yield and quality, flour extraction all increase substantially, and power consumption obviously reduces, and has saved the energy and has highlighted huge economic benefit and social benefit.
Embodiment 2
A kind of wheat processing process damp-heat air reuse technology, its processing step following (with 300 tons of day processing wheats, the wheat wetting storehouse of 8 2m * 3m * 18m, 1 diameter 2m, the clean wheat bin of high 3m):
1. with the former damp-heat air that enters atmosphere between food car, introduce and collect mixer (this mixer adopts dynamic impeller adding pressure type, power disposition 5.5kw), then enter manifold trunk (the diameter at butt end 500mm of manifold trunk, top diameter 300mm, length 14m), wind speed 12m/s in the pipe;
2. corresponding position on manifold trunk corresponding to wheat wetting storehouse bottom centre position, opening picks out the arm that puts in storage.The put in storage diameter 200mm of arm, length 1.5m, wind speed 10m/s in the pipe arranges regulating butterfly valve in the position of the place's of putting in storage convenient operation;
3. in the arm exit of putting in storage one umbrella shape case is set, case not only guarantees that damp-heat air sheds smoothly but also prevents that wheat from entering in the pipe from the arm outlet 120mm that puts in storage;
4. result's test: 12 ℃ of workshop condition temperature, humidity 25%; Enter 36 ℃ of the temperature of workshop damp-heat air, humidity 55%; Behind 30 hours wheat wettings, it is as follows that leading indicator detects comparative result respectively:
Figure BSA00000443744400051
Known by table: after adopting the technology of the present invention, the leading indicators such as Yield and quality, flour extraction all increase substantially, and power consumption obviously reduces, and has saved the energy and has highlighted huge economic benefit and social benefit.
Embodiment 3
A kind of wheat processing process damp-heat air reuse technology, its processing step following (with 200 tons of day processing wheats, the wheat wetting storehouse of 4 3m * 3m * 17m, 1 diameter 2m, the clean wheat bin of high 2.6m, 1 group of conveying wind net, 1 group of drying wheat bran system is the example explanation):
1. with the former damp-heat air that enters atmosphere of strength conveying wind net and drying wheat bran system, (this mixer adopts dynamic impeller adding pressure type to be changed into the collection mixer, power disposition 7.5kw), then enter manifold trunk (the diameter at butt end 650mm of manifold trunk, top diameter 200mm, length 15m), wind speed 18m/s in the pipe;
2. corresponding position on the manifold trunk in centre, wheat wetting storehouse, opening picks out the arm that puts in storage.The put in storage diameter 160mm of arm, length 16m, wind speed 12m/s in the pipe arranges regulating butterfly valve in the position of the place's of putting in storage convenient operation;
3. pick out ten dispensing branch by spiral on the arm that puts in storage, dispensing branch is 70 degree with the angle of the arm that puts in storage, the length 1.1m of dispensing branch, two arm angles, 100 degree, spacing 1.4m, wind speed 2-3.5m/s in the pipe;
4. result's test: 10 ℃ of workshop condition temperature, humidity 17%; 28 ℃ of wind net air outlet temperature, humidity 52%; Drying wheat bran system air outlet temperature 45 C, humidity 58%, behind 30 hours wheat wettings, it is as follows that leading indicator detects comparative result respectively:
Figure BSA00000443744400052
Known by table: after adopting the technology of the present invention, the leading indicators such as Yield and quality, flour extraction all increase substantially, and power consumption obviously reduces, and has saved the energy and has highlighted huge economic benefit and social benefit.
Embodiment 4
A kind of wheat processing process damp-heat air reuse technology, its processing step is following (with 300 tons of day processing wheats, the wheat wetting storehouse of 8 2m * 3m * 18m, 1 diameter 2m, the clean wheat bin of high 3m, 2 groups of conveying wind nets, 1 group of drying wheat bran system, 1 group of biscuit processing drying production line is the example explanation):
1. with strength conveying wind net and drying wheat bran system and the former damp-heat air that enters atmosphere of biscuit processing drying production line, (this mixer adopts dynamic impeller adding pressure type to be changed into the collection mixer, power disposition 11kw), then enter manifold trunk (the diameter at butt end 750mm of manifold trunk, top diameter 220mm, length 19m), wind speed 19m/s in the pipe;
2. corresponding position on the manifold trunk in centre, wheat wetting storehouse, opening picks out the arm that puts in storage.The put in storage diameter 180mm of arm, length 17m, wind speed 16m/s in the pipe arranges regulating butterfly valve in the position of the place's of putting in storage convenient operation;
3. pick out 14 dispensing branch by spiral on the arm that puts in storage, dispensing branch is 40 degree with the angle of the arm that puts in storage, the length 1.2m of dispensing branch, two arm angles, 90 degree, spacing 1.3m, wind speed 4-6m/s in the pipe;
4. result's test: 10 ℃ of workshop condition temperature, humidity 17%; 28 ℃ of wind net air outlet temperature, humidity 45%; 40 ℃ of drying wheat bran system air outlet temperature, humidity 55%; 46 ℃ of biscuit processing drying production line air outlet temperature, humidity 45%; Behind 30 hours wheat wettings, it is as follows that leading indicator detects comparative result respectively:
Figure BSA00000443744400062
Known by table: after adopting the technology of the present invention, the leading indicators such as Yield and quality, flour extraction all increase substantially, and power consumption obviously reduces, and has saved the energy and has highlighted huge economic benefit and social benefit.

Claims (10)

1. a wheat processing process damp-heat air reuse technology is characterized in that: after adopting the collection mixer to collect the damp-heat air in the wheat processing process, adopt manifold trunk and the arm that puts in storage to be back in the wheat bin wheat is carried out heating and moistening;
Damp-heat air in the described wheat processing process derives from the damp-heat air that contains a small amount of dust that workshop strength conveying wind net is discharged;
Or the drying wheat bran system damp-heat air that contains a small amount of dust of discharging;
Or food production line, dry or steam the wet-hot steam that process is discharged;
Or above-mentioned compound.
2. reuse technology according to claim 1 is characterized in that: the damp-heat air that described damp-heat air can also adopt enterprise to produce or the used heating system of living is discharged.
3. reuse technology according to claim 1 and 2 is characterized in that: described damp-heat air enters trunk line by collecting mixer, is distributed the arm that puts in storage that enters each wheat bin by trunk line; The described arm that puts in storage passes at the bottom of Cang Ding or storehouse.
4. reuse technology according to claim 1 and 2 is characterized in that: also be connected with external heat source or humidification source on the described collection mixer; Described collection mixer is divided into positive displacement or vane type.
5. reuse technology according to claim 4 is characterized in that: turbomixer employing Powerless mixing or dynamic pressurization mixing.
6. reuse technology according to claim 3 is characterized in that: be provided with dispensing branch on the described arm that puts in storage.
7. reuse technology according to claim 1 is characterized in that: wind speed is 10-20m/s in the described manifold trunk; Terminal top diameter is 120-350mm.
8. reuse technology according to claim 1, it is characterized in that: when the described arm that puts in storage passed into from Cang Ding, the diameter of arm was 80-200mm, wind speed is than the low 2-10m/s of manifold trunk wind speed in the pipe; Its bottom apart from the storehouse at the bottom of 0.5-1.0m.
9. reuse technology according to claim 1 is characterized in that: when the described arm that puts in storage passed at the bottom of the storehouse, the diameter of arm was 200-300mm, and wind speed is than the low 2-10m/s of manifold trunk wind speed in the pipe; Put in storage the arm top apart from the storehouse at the bottom of 0.3m-push up 2m apart from the storehouse.
10. reuse technology according to claim 6, it is characterized in that: the spread pattern of described dispensing branch is spiral or single row type or double-row type or many rows formula.
CN 201110051664 2011-03-04 2011-03-04 Recycling process of hot and humid air generated in wheat processing Expired - Fee Related CN102249055B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002573A1 (en) * 1979-05-15 1980-11-27 C Larsson A method and an arrangement for storing organic fibrous material in a stack
CN2862658Y (en) * 2005-04-05 2007-01-31 国家粮食储备局无锡科学研究设计院 Grain storage ventilating and adjusting implement
CN201352047Y (en) * 2008-12-24 2009-11-25 王莹 Energy-saving automatic baking equipment
CN101744046A (en) * 2010-01-20 2010-06-23 华南农业大学 High humidity grain dryer
CN201617133U (en) * 2009-12-31 2010-11-03 河南农业大学 Drying system for drying grain
CN201709379U (en) * 2010-06-23 2011-01-19 湖南省烟草公司衡阳市公司 Bulk curing barn waste heat utilization device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002573A1 (en) * 1979-05-15 1980-11-27 C Larsson A method and an arrangement for storing organic fibrous material in a stack
CN2862658Y (en) * 2005-04-05 2007-01-31 国家粮食储备局无锡科学研究设计院 Grain storage ventilating and adjusting implement
CN201352047Y (en) * 2008-12-24 2009-11-25 王莹 Energy-saving automatic baking equipment
CN201617133U (en) * 2009-12-31 2010-11-03 河南农业大学 Drying system for drying grain
CN101744046A (en) * 2010-01-20 2010-06-23 华南农业大学 High humidity grain dryer
CN201709379U (en) * 2010-06-23 2011-01-19 湖南省烟草公司衡阳市公司 Bulk curing barn waste heat utilization device

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