CN103822454A - Wet meal drying system based on mechanical steam recompression and drying technique - Google Patents
Wet meal drying system based on mechanical steam recompression and drying technique Download PDFInfo
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Abstract
The invention discloses a wet meal drying system based on mechanical steam recompression which comprises a diffuser, wherein a discharging port of the diffuser is communicated with a feeding port of a press filter; the discharging port of the press filter is communicated with a superheated steam rotary drying machine; a secondary steam outlet of the superheated steam rotary drying machine is communicated with an air suction port of a mechanical steam compressor; an air outlet of the mechanical steam compressor is communicated with a heating tube beam in the superheated steam rotary drying machine; a steam inlet is arranged in the superheated steam rotary drying machine; a condensate water outlet which is communicated with a first storage jar is arranged in the superheated steam rotary drying machine; the discharging port of the superheated steam rotary drying machine is communicated with a hot air fluid bed dryer; the first storage jar is communicated with a heating tube in the hot air fluid bed dryer; a liquid outlet of the hot air fluid bed dryer is communicated with a second storage jar; the liquid outlet of the second storage jar is communicated with a liquid inlet of the diffuser. The invention also discloses a technique utilizing the system. The wet meal drying system based on the mechanical steam recompression has the advantages that the drying energy consumption is low, the equipment is free from dead angle and the recycling of alcoholic solution does not require a large amount of cooling water for cooling.
Description
Technical field
The present invention relates to a kind of wet dregs of rice precipitation drying system and technique, belong to the dry technology of albumen powder, especially a kind of wet dregs of rice drying system and drying process based on mechanical steam recompression.
Background technology
FSPC is the natural additive for foodstuff of high-quality, and it is take low temperature soy meal as raw material, and there are lixiviate, precipitation, ultramicro grinding, Functional Conversion etc. in main workshop section.From the infuser wet dregs of rice after extruding out, generally all contain 25%～35% solvent and a certain amount of moisture, the dregs of rice that contain solvent and moisture are referred to as the wet dregs of rice.The common method that the wet dregs of rice are sloughed solvent and moisture is by means of heating, make solvent and moisture in the wet dregs of rice obtain heat energy and vaporize, thereby separate with the dregs of rice, thisly borrow heat energy from solid material, to remove operating in of hygroscopic water (solvent and moisture) in chemical industry, to be called the dry of solid, hygroscopic water is from wet dregs of rice diffusion inside to surface, and then vaporization and transferring in gas phase.But all condensations of the dry tail vapour of the wet dregs of rice, reuse, could be reasonable economically, and maintain normal production.
Existing protein concentrate production technology, widely used wet dregs of rice desolventizing machine: the one, the high bed of material dryer of former German LURGI exploitation, is mainly used in dividing lower solid material into immersion; The one, the DT(precipitation developed on schumacher patent basis-roasting dregs of rice), DTDC (precipitation-roasting dregs of rice-dry-cooling) etc.Its basic operation principle is similar, the wet dregs of rice that come from extruder are directly delivered to horizontal drier, then send into disc type (or being called vertical) drying machine by conveying mechanism and carry out depth drying, wherein in horizontal drier, adopt superheated steam contact drying, vertical drier adopts superheated steam contact drying and 2 kinds of modes of hot blast convection drying.The tail gas of the interior superheated steam contact drying of the dried tail gas of horizontal drier and vertical drier is collected into condenser and carries out condensation, obtains the mixed liquor of alcohol and water, reuses for process cycles.
Visible, the process that the wet dregs of rice remove hygroscopic water is to have experienced two links of gasification-condensation, in conventional protein concentrate production technology, dry run needs live steam that a large amount of gasification latent heats is provided, and condensation process needs a large amount of cooling waters that corresponding condensation latent heat is provided equally.Drying process is the maximum link that consumes energy in protein concentrate production process, accounts for 65% left and right.And in the heated-air drying part of vertical drier, at the very easily sticky long-pending material of bottom surface of vertical shaft and material disc, cause and go mouldy, cause Escherichia coli to exceed standard, product quality is not up to standard.
If can improve the drying process of the wet dregs of rice, reduce heat energy and power consumption on the one hand, reduce on the other hand solid accumulation, can significantly reduce the production cost of protein concentrate, and improve the quality of albumen powder, improve product competition level.
Summary of the invention
The object of the invention is for overcoming wet dry high energy consumption and the inferior technical deficiency of the dregs of rice in existing protein concentrate production process, a kind of wet dregs of rice drying system and drying process based on mechanical steam recompression is provided, and the recovery that its energy consumption for drying is low, equipment is difficult for piling up sex change, alcoholic solution without dead angle, material is without a large amount of water quench.
For achieving the above object, the present invention adopts following technical proposals:
A kind of wet dregs of rice drying system based on mechanical steam recompression, comprise digester, the discharging opening of digester is communicated with feed opening of press filter, the discharging opening of filter press is communicated with superheated steam rotary dryer, the indirect steam outlet of superheated steam rotary dryer communicates with the air entry of mechanical vapour compressor, the gas outlet of mechanical vapour compressor is communicated with the heating tube bundle of superheated steam rotary dryer inside, superheated steam rotary dryer is provided with the steam inlet communicating with its inside, on superheated steam rotary dryer, be also provided with the condensation-water drain communicating with the first storage tank, the discharging opening of superheated steam rotary dryer is communicated to hot air fluidized bed dryer, the first storage tank communicates with the heating tube in hot air fluidized bed dryer, the liquid outlet of hot air fluidized bed dryer is communicated to the second storage tank, the second storage tank liquid outlet is communicated to the inlet of digester.
The inlet of described digester is connected with fresh alcoholic solution source with the second storage tank respectively by pipeline in parallel, on the parallel pipeline being connected with fresh alcoholic solution source with the second storage tank, is respectively equipped with the first valve and the second valve.
Steam inlet place on described superheated steam rotary dryer is provided with the 3rd valve; The pipeline that the gas outlet of described mechanical vapour compressor is connected with the heating tube bundle of superheated steam rotary dryer inside is provided with the 4th valve.
Described the second storage tank liquid outlet is the inlet to digester by pump and pipeline communication.
In described superheated steam rotary dryer, be provided with the first temperature and pressure harvester.
The steam inlet place of described superheated steam rotary dryer is provided with the 4th temperature and pressure harvester.
The air entry of described mechanical vapour compressor and gas outlet place are respectively equipped with the 3rd and warmly take and pressure acquisition device.
In described hot air fluidized bed dryer, be provided with the 5th temperature and pressure harvester.
A drying process that utilizes the wet dregs of rice drying system based on mechanical steam recompression, step is as follows:
1) fresh alcoholic solution and dregs of beans raw material are delivered to immersion extraction in digester in the lump;
2) the wet dregs of beans after extraction is delivered to and in filter press, carries out mechanical presses dehumidification;
3) the wet dregs of rice after dehumidification are delivered in superheated steam rotary dryer via auger;
4), when system boot, a part of initial steam in external steam source enters in the heating tube bundle in superheated steam rotary dryer as described dry starting up's thermal source;
5) in dry run, the wet dregs of rice remove hygroscopic water to produce a large amount of indirect steams are alcohol and water mixed vapour, indirect steam is connected to the air entry of mechanical vapour compressor, after indirect steam is compressed by the described compressor degree of depth, steam pressure and temperature are all significantly improved and become superheated steam, this part superheated steam is delivered to heating tube bundle in superheated steam rotary dryer, stop supplying with initial steam simultaneously and enter vapours rotary dryer, be that indirect steam after compressed replaces initial steam as drying source, complete dry start process;
6) in dry run, only in the front end inlet of superheated steam rotary dryer, fill into conventional wet dregs of rice drying process and need use 10% initial steam of quantity of steam (by volume), this part initial steam plays a part to take wet and optimizes airflow field, temperature field and hygroscopic water concentration field in drying machine;
7) indirect steam after compressed, obtains after completing heat effect coolingly becoming alcohol and water condensation by mixing liquid to be back to the first storage tank for subsequent use in the heating tube bundle of superheated steam rotary dryer;
8) in superheated steam rotary dryer, complete the dry wet dregs of rice and enter hot air fluidized bed dryer through conveying device, fluid bed dryer heating pipe built-in, alcohol in the first storage tank and water condensation by mixing liquid are delivered to the wet dregs of rice of heating tube heating of fluid bed dryer by pump, the alcohol and the water condensation by mixing liquid that complete heat effect are back to the second storage tank;
9) the wet dregs of rice that complete depth drying at hot air fluidized bed dryer are protein concentrate through the wet dregs of rice dry run that cyclone separator is collected, pack completes protein concentrate processing.
Alcohol in the second storage tank of described step 8) and water condensation by mixing liquid are delivered in digester by pump after further adjustment reaches use alcohol concentration, thereby complete recycling and reusing of alcohol and water condensation by mixing liquid.
The material import and export of each unit, medium are imported and exported and are equipped with the sealing device that prevents that material and medium from revealing.
In the present invention, first dregs of beans enters extruder after lixiviate, in extruder, the hygroscopic water (alcohol and water) of the wet dregs of rice is down to 55% left and right by initial 65%, then be delivered to steam rotary dryer by conveyer device&apos, dry start process provides heat by superheated steam, after removing, hygroscopic water produces indirect steam, indirect steam is via collection, conveying device enters mechanical vapor compressor, after compressor compresses, steam pressure, temperature is significantly increased and becomes superheated steam, this part superheated steam is admitted to alternative live steam in the heating tube in steam rotary dryer, complete rotary dryer and mechanical steam recompression device cooperation after start process, dry run only needs the live steam of minute quantity to fill in rotary dryer, lose and supplement input and output material heat content for supplemental heat, significantly reduce the dry consumption to external live steam, primary steam air consumption is only the 5-10% of existing drying process, can play the temperature field of taking in wet and optimization drying machine simultaneously, the effect of hygroscopic water concentration field.In heat drying material, be able to the cooling liquid alcohol water blend that becomes from the indirect steam of vapour compression machine, alcoholic solution is back in storage tank for subsequent use.
In the dry drying machine of steam rotary, completing dry material adopts screeding device to be delivered to air drier, air drier adopts the fluidized bed drying pattern of heating pipe built-in, configuration blower fan completes the fluidisation of material, and the alcoholic solution in storage tank is delivered to circulating pump in the interior heating tube of air drier and completes interior heating process.Alcoholic solution after cooling is transported to front-end process-leaching process that protein concentrate is produced, and the repetitive cycling that completes alcohol is used.
It seems from whole process analysis, the dry required heat of the wet dregs of rice is only the temperature rise sensible heat heat consumption of wet stock, compared to existing drying process, wet dregs of rice drying process energy consumption based on function of mechanical steam recompression device (MVR) is few, and the energy consumption of this drying process is only 15% left and right of existing conventional drying process energy consumption in theory.Alcohol removal process no longer needs cooling water, reduces heat energy and power consumption, and without condensing plant, initial cost and operating cost reduce greatly.
Accompanying drawing explanation
Fig. 1 is system flow chart of the present invention;
1-digester, 2-filter press, 3-rotary dryer, 4-the 3rd valve, 5-the 4th valve, 6-mechanical vapour compressor (MVR), 7-the first storage tank, 8-pump, 9-fluid bed dryer, 10-the second storage tank, 11-pump, 12-the first valve, 13-the second valve.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
In Fig. 1, wet dregs of rice drying system comprises a superheated steam rotary dryer 3, mechanical vapour compressor 6, internal heating fluidized bed drying machine 9 and conveying, storage device.
The discharging opening of digester 1 is communicated with filter press 2 charging apertures, the discharging opening of filter press 2 is communicated with superheated steam rotary dryer 3, the indirect steam outlet of superheated steam rotary dryer 3 communicates with the air entry of mechanical vapour compressor 6, the gas outlet of mechanical vapour compressor 6 is communicated with the heating tube bundle of superheated steam rotary dryer 3 inside, superheated steam rotary dryer 3 is provided with the steam inlet communicating with its inside, on superheated steam rotary dryer 3, be also provided with the condensation-water drain communicating with the first storage tank 7, the discharging opening of superheated steam rotary dryer 3 is communicated to hot air fluidized bed dryer 9, the first storage tank 7 communicates with the heating tube of crossing in hot air fluidized bed dryer 9, the liquid outlet of hot air fluidized bed dryer 9 is communicated to the second storage tank 10, the second storage tank 10 liquid outlets are communicated to the inlet of digester 1.
The inlet of digester 1 is connected with fresh alcoholic solution source with the second storage tank 10 respectively by pipeline in parallel, on the parallel pipeline being connected with fresh alcoholic solution source with the second storage tank 10, is respectively equipped with the first valve 12 and the second valve 13.
Steam inlet place on superheated steam rotary dryer 3 is provided with the 3rd valve 4; The pipeline that the gas outlet of mechanical vapour compressor is connected with the heating tube bundle of vapours rotary dryer inside is provided with the 4th valve 5.
The second storage tank 10 liquid outlets are the inlet to digester 1 by pump 11 and pipeline communication.In superheated steam rotary dryer 3, be provided with the first temperature and pressure harvester.The steam inlet place of superheated steam rotary dryer 3 is provided with the 4th temperature and pressure harvester.The air entry of mechanical vapour compressor 6 and gas outlet place are respectively equipped with the 3rd and warmly take and pressure acquisition device.In hot air fluidized bed dryer 9, be provided with the 5th temperature and pressure harvester.
When system boot, the second valve 13 is opened, the first valve 12 is closed, fresh alcoholic solution and dregs of beans raw material are delivered in digester 1 in the lump, dregs of beans through certain density alcohol-water solution after the interior immersion of infuser 1 extraction, wet dregs of beans is delivered to and in filter press 2, carries out mechanical presses dehumidification, the wet dregs of rice that remove a part of surface water are delivered in superheated steam rotary dryer 3 via auger, when system boot, rotary dryer 3 needs a certain amount of initial steam that starting up is provided thermal source, now the 3rd valve 4 is opened, the 4th valve 5 is closed, initial steam enters in the heating tube bundle D in drying machine 3 as dry starting up's thermal source via the 3rd valve 4, in dry run, the wet dregs of rice remove hygroscopic water and produce a large amount of indirect steams (alcohol and water mixed vapour), indirect steam is connected to the suction inlet A of mechanical vapour compressor 6 via metal hose, after indirect steam is compressed by compressor 6 degree of depth, steam pressure and temperature are all significantly improved and become superheated steam, this part superheated steam is delivered to the interior heating tube bundle D of rotary dryer 3, close the 3rd valve 4 simultaneously, stop supplying with a large amount of initial steams, be that indirect steam after compressed replaces initial steam as drying source, complete dry start process.
Only, at the C of the front end inlet place of rotary dryer 3, fill into a small amount of initial steam, this part a small amount of steam works to take airflow field, temperature field and hygroscopic water concentration field in wet and optimization drying machine.
Indirect steam after compressed obtains complete heat effect in the heating tube bundle D of drying machine 3 after coolingly becoming condensate liquid to be back to the first storage tank 7 for subsequent use.In rotary dryer 3, complete the dry dry wet dregs of rice of first stage and enter hot air fluidized bed dryer 9 through conveying devices such as scraper plates, fluid bed dryer heating pipe built-in E, the heating tube E that alcohol-water solution in storage tank is delivered to fluid bed dryer 9 by pump 8 adds thermal material, and the alcohol-water solution that completes heat effect is back to the second storage tank 10.The wet dregs of rice that complete depth drying at fluid bed inner drying machine 9 are that protein concentrate collects, packs through cyclone separator the wet dregs of rice dry run that completes protein concentrate processing.
After the normal operation of whole system, close the second valve 13, the alcohol-water solution of opening the first valve 12, the second storage tanks interior 10 is delivered in digester 1 by pump 11 after further adjusting alcohol concentration, thereby completes recycling and reusing of alcohol-water solution.
In whole system, need to carry out data acquisition and controlling to the temperature and pressure at following several places: the pressure P 1 of rotary dryer 3 inside and temperature T 1, the indirect steam that drying machine 3 is discharged is in pressure P 2 and the temperature T 2 at mechanical vapour compressor 6 suction inlet places, the pressure P 3 in mechanical vapour compressor 6 exits and temperature T 3, the pressure P 4 at rotary dryer 3 steam inlet places and temperature T 4, the pressure P 5 of fluid bed dryer 9 inside and temperature T 5.Controlled pressure P1, P4 and P5 object are to guarantee that pressure in rotary dryer 3 and fluid bed dryer 9 is in safety operation scope, detect and control temperature T 1, T4 and T5 and can meet drying process requirement, to guarantee rate of drying and drying effect; Detected pressures P2, P3, T2 and T3 can determine that whether mechanical vapour compressor is in normal operating conditions; normally work and the compressed steam that sets parameter is provided to guarantee mechanical vapour compressor 6; by the comparison to P3, T3 and P4, T4 numerical value, control the aperture that enters rotary dryer 3 heating tube two-way jet chimney valves.
In whole dry run, the alcohol-water removing obtains condensation and discharges latent heat in this technique, and do not utilize a large amount of cooling waters to carry out condensation, the thermal energy consumption of minimizing, does not have the circulation power consumption of recirculated water, there is no the power consumption of cooling tower, there is no the elegant grade of the water loss of cooling tower, the wet dregs of rice drying that protein concentrate is produced, energy consumption saving amount is very considerable, can greatly reduce the production cost of product, improve the competitiveness of product.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (10)
1. the wet dregs of rice drying system based on mechanical steam recompression, comprise digester, the discharging opening of digester is communicated with feed opening of press filter, the discharging opening of filter press is communicated with superheated steam rotary dryer, it is characterized in that, the indirect steam outlet of superheated steam rotary dryer communicates with the air entry of mechanical vapour compressor, the gas outlet of mechanical vapour compressor is communicated with the heating tube bundle of superheated steam rotary dryer inside, superheated steam rotary dryer is provided with the steam inlet communicating with its inside, on superheated steam rotary dryer, be also provided with the condensation-water drain communicating with the first storage tank, the discharging opening of superheated steam rotary dryer is communicated to hot air fluidized bed dryer, the first storage tank communicates with the heating tube in hot air fluidized bed dryer, the liquid outlet of hot air fluidized bed dryer is communicated to the second storage tank, the second storage tank liquid outlet is communicated to the inlet of digester.
2. the system as claimed in claim 1, it is characterized in that, the inlet of described digester is connected with fresh alcoholic solution source with the second storage tank respectively by pipeline in parallel, on the parallel pipeline being connected with fresh alcoholic solution source with the second storage tank, is respectively equipped with the first valve and the second valve.
3. the system as claimed in claim 1, is characterized in that, the steam inlet place on described superheated steam rotary dryer is provided with the 3rd valve; The pipeline that the gas outlet of described mechanical vapour compressor is connected with the heating tube bundle of superheated steam rotary dryer inside is provided with the 4th valve.
4. the system as claimed in claim 1, is characterized in that, described the second storage tank liquid outlet is the inlet to digester by pump and pipeline communication.
5. the system as claimed in claim 1, is characterized in that, is provided with the first temperature and pressure harvester in described superheated steam rotary dryer.
6. the system as claimed in claim 1, is characterized in that, the steam inlet place of described superheated steam rotary dryer is provided with the 4th temperature and pressure harvester.
7. the system as claimed in claim 1, is characterized in that, the air entry of described mechanical vapour compressor and gas outlet place are respectively equipped with the 3rd and warmly take and pressure acquisition device.
8. the system as claimed in claim 1, is characterized in that, is provided with the 5th temperature and pressure harvester in described hot air fluidized bed dryer.
9. a drying process for the wet dregs of rice drying system of utilization based on mechanical steam recompression, is characterized in that, step is as follows:
1) fresh alcoholic solution and dregs of beans raw material are delivered to immersion extraction in digester in the lump;
2) the wet dregs of beans after extraction is delivered to and in filter press, carries out mechanical presses dehumidification;
3) the wet dregs of rice after dehumidification are delivered in superheated steam rotary dryer via auger;
4), when system boot, a part of initial steam in external steam source enters in the heating tube bundle in superheated steam rotary dryer as described dry starting up's thermal source;
5) in dry run, the wet dregs of rice remove hygroscopic water to produce a large amount of indirect steams are alcohol and water mixed vapour, indirect steam is connected to the air entry of mechanical vapour compressor, after indirect steam is compressed by the described compressor degree of depth, steam pressure and temperature are all significantly improved and become superheated steam, this part superheated steam is delivered to heating tube bundle in superheated steam rotary dryer, stop supplying with initial steam simultaneously and enter vapours rotary dryer, be that indirect steam after compressed replaces initial steam as drying source, complete dry start process;
6) in dry run, only in the front end inlet of superheated steam rotary dryer, filling into conventional wet dregs of rice drying process need be with 10% initial steam of quantity of steam, and this part initial steam plays a part to take wet and optimizes airflow field, temperature field and hygroscopic water concentration field in drying machine;
7) indirect steam after compressed, obtains after completing heat effect coolingly becoming alcohol and water condensation by mixing liquid to be back to the first storage tank for subsequent use in the heating tube bundle of superheated steam rotary dryer;
8) in superheated steam rotary dryer, complete the dry wet dregs of rice and enter hot air fluidized bed dryer through conveying device, fluid bed dryer heating pipe built-in, alcohol in the first storage tank and water condensation by mixing liquid are delivered to the wet dregs of rice of heating tube heating of fluid bed dryer by pump, the alcohol and the water condensation by mixing liquid that complete heat effect are back to the second storage tank;
9) the wet dregs of rice that complete depth drying at hot air fluidized bed dryer are protein concentrate through the wet dregs of rice dry run that cyclone separator is collected, pack completes protein concentrate processing.
10. technique as claimed in claim 9, it is characterized in that, alcohol in the second storage tank of described step 8) and water condensation by mixing liquid are delivered in digester by pump after further adjustment reaches use alcohol concentration, thereby complete recycling and reusing of alcohol and water condensation by mixing liquid.
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| CN105865191A (en) * | 2016-04-22 | 2016-08-17 | 天华化工机械及自动化研究设计院有限公司 | Method for vinasse tube bank type drying and exhaust gas and steam condensed liquid heat recycling |
| CN107076514A (en) * | 2014-12-02 | 2017-08-18 | 月岛机械株式会社 | Rotary drier and drying means with indirect heating tube |
| CN107188925A (en) * | 2017-05-16 | 2017-09-22 | 北京清大天工能源技术研究所有限公司 | A kind of vegetable protein flash-off steam reuse method based on HEAT PUMP BASED ON EJECTING PRINCIPLE technology |
| CN107246748A (en) * | 2017-05-16 | 2017-10-13 | 北京清大天工能源技术研究所有限公司 | The MVR heat-pump-types waste heat and water reusing method of a kind of vegetable protein flash process |
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| CN107076514B (en) * | 2014-12-02 | 2020-01-07 | 月岛机械株式会社 | Rotary dryer with indirect heating pipe and drying method |
| CN105815542A (en) * | 2016-04-01 | 2016-08-03 | 山东凯斯达机械制造有限公司 | Method and device for desolventizing alcohol leached protein concentrate |
| CN105865191A (en) * | 2016-04-22 | 2016-08-17 | 天华化工机械及自动化研究设计院有限公司 | Method for vinasse tube bank type drying and exhaust gas and steam condensed liquid heat recycling |
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| CN107246748A (en) * | 2017-05-16 | 2017-10-13 | 北京清大天工能源技术研究所有限公司 | The MVR heat-pump-types waste heat and water reusing method of a kind of vegetable protein flash process |
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| CN109442965A (en) * | 2018-11-12 | 2019-03-08 | 北京国电龙源环保工程有限公司 | A kind of brown coal drying receipts water system based on steam recompression technology |
| CN109836472A (en) * | 2019-04-03 | 2019-06-04 | 迈安德集团有限公司 | A kind of soy protein concentrate preparation system |
| CN109836472B (en) * | 2019-04-03 | 2024-01-26 | 迈安德集团有限公司 | System is prepared to soybean concentrated protein |
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| CN111406828B (en) * | 2020-03-30 | 2022-01-21 | 山东凯斯达机械制造有限公司 | Device and process for extracting soybean effective components by using mixed solvent |
| CN111394177A (en) * | 2020-03-30 | 2020-07-10 | 山东凯斯达机械制造有限公司 | Process for extracting soybean mixed oil and soybean liquid by using mixed solvent |
| CN114754564A (en) * | 2022-05-13 | 2022-07-15 | 江苏格兰特干燥浓缩设备有限公司 | Low-energy-consumption tube bundle drying machine and using method thereof |
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