CN1090914C - Method for preparing instant gruel - Google Patents

Abstract

The present invention relates to a processing method of an instant gruel body, which comprises the steps: firstly, superior quality granular grain rice is adopted as a raw material to remove impurities, the grain rice is cleaned, processed, soaked under a room temperature condition and cured with filtered steam, the grain rice cured passes through a drying channel provided with a hot air spraying pipe at the top, and the grain rice cured is dried by hot air which blows while the grain rice cured is conveyed; material granules are pressed into slices after cooled, and the slices are continuously dried by the hot air; the slices are conveyed to a high temperature tunnel under normal pressure after cooled, and the slices are bulked when blown by the hot air ejected from an assembled nozzle in the tunnel; the slices are cooled to reach the room temperature so as to obtain a finished product. The method has the advantages of thorough curing, uniform bulking, rehydration time shortening and remarkable product quality improvement. The finished product maintains the color, the taste and the granularity of the raw material, and can reduce the nutrient loss to a maximum limit.

Description

Make things convenient for the processing method of chuckchuck sound body

The present invention relates to a kind of production technology of fast-food type food, particularly a kind of processing method of major ingredient congee body of serial instant congee.

Along with the quickening of people's rhythm of life, fast-food type food is more and more favored, and once emerging, promptly the preparation method to traditional rice, face, congee has proposed challenge as instant food such as instant noodles, convenient rice, instant gruels.According to statistics, in the processing method of at present domestic and international fast food, mostly be highly bulked product greatly, need in its raw material to add polished rice, glutinous rice etc., as United States Patent (USP) 4548830, the open 59-21361 of Japan's special permission, Chinese patent application 86107962A, 89102572.3 etc.Existing screw extrusion process application commonplace.This processing step is earlier raw material pulverizing to be handled, and through batching, enters extruder again, relies on material to push high temperature, the high pressure that is produced within it, makes the material slaking, and is discharged from moment of equipment at material, utilizes the exit differential pressure action, makes material expanded.In the above-mentioned bulking process, because of material needs slaking under high-temperature high-pressure state, so the loss of the nutrition of finished product is bigger, and the color and luster dimness, it is bad that mouthfeel becomes, no granularity sense.Institute's water content is few before the material slaking in addition, though through high temperature, HIGH PRESSURE TREATMENT, still can't guarantee complete slaking, causes its appearance slaking and heart is half-cooked, and long-term indeterminable hard nut to cracks such as anvil tooth, rehydration time be long appear in finished product.

The purpose of this invention is to provide a kind of processing method that makes things convenient for the chuckchuck sound body, it is from the finished product anvil tooth that solved prior art and exist at all, easily return problems such as give birth to, rehydration time is long, it is thorough that this method has slaking, expanded even, make finished product keep color and luster, taste and the granularity sense of raw material, can reduce nutritive loss to greatest extent, shorten rehydration time, significantly improve the advantage of product quality.

The object of the present invention is achieved like this: it is that the granular high-quality paddy rice of 75-85% is raw material that this method is at first selected vitreousness for use, through impurity elimination, cleaning treatment, soaked at ambient temperature 30-150 minute, utilize then and filter steam cure, curing temperature 100-110 ℃, curing time 20-65 branch, paddy rice after the slaking utilizes conveyer that the dry channel of hot blast jet pipe is arranged through the top continuously, carry on the limit, limit blowing hot-air drying, to expect the grain tablet forming after cooling, and continue after cooling it to be delivered to the constant-pressure and high-temperature tunnel with jigging conveyer by the further blowing hot-air drying of conveyer, the hot blast of the combination nozzle ejection in the tunnel blows down, it is expanded that material is suspension moment, and be sent to cooling tunnel with conveyer, is cooled to room temperature and gets product.

Since The present invention be directed to the existing rehydration time of the screw extrusion technology that generally adopts of home and abroad fast-food type food long, easily return give birth to, mouthfeel is poor, nutrition destroys problems such as serious, through scientific research and repetition test, abandon backward extruding-puffing technique, propose preferred pellet, soak in good time, steam slaking, hot blast normal pressure, twice drying, the expanded unique technology of compressing tablet, so can fundamentally solve many problems that is difficult to overcome that prior art exists, significantly improve the quality of manufactured goods.In this technological process, at first, the preferred higher granular paddy rice of vitreousness, as maize pulp, rice, sorghum rice, shelled buckwheat, black rice etc. is raw material, directly into machine, practical application proves to have only the pellet of vitreousness at 75-85%, through just reaching high bulking rate (about 95%) after the deep processing, guarantee the quality of congee body.It is compared with the screw rod extrusion process, can reduce and once pulverize link, not only avoids once more in the crushing process destruction for original pellet nutrition, quality and taste, but also can keep its original type constant.Secondly, adopt immersion in this method, steam curing step, its objective is, make pellet absorb an amount of moisture content, make slaking more thorough by in good time immersion.If soak time is short, can not absorb enough moisture content, influence the slaking quality, if soak time is long, take a lot of work, time-consuming, hyperabsorption moisture content, increase subsequent handling dewatering time wastes energy.Steaming maturing process is to utilize filtration steam directly to penetrate the bed of material that places the chain transmission net in steam box, under the situation that transmission net turns round continuously, steam, curing temperature remains on 100-110 ℃, curing time 20-65 minute, can make the complete slaking of pellet, simultaneously steam mode because of employing again, reduce as far as possible and cook the contained moisture content of back pellet, so can shorten later stage heated-air drying and expanded time, this has not only improved operating efficiency and energy savings, also reduce nutritive loss to greatest extent and shorten rehydration time, therefore, the advantage of above-mentioned operation also is that the screw rod extrusion process is incomparable.The present invention adopts twice heated-air drying, cooling, except that the pellet that makes slaking is realized fast dewatering, can also impel it to reach postorder compressing tablet and the required moisture content of expanded operation respectively, alleviate the postorder burden, guarantee that compressing tablet and expanded operation carry out smoothly, the outlet temperature of hot blast jet pipe is 35-95 ℃.Sheeting process is pressed into the thin slice of suitable depth with pellet, and compressing tablet thickness is preferably 0.5-0.9mm, can accelerate the lost speed of moisture when dry for the second time.Expanded operation is the core of this technological process.It is that the cooled pellet of drying is delivered to the constant-pressure and high-temperature tunnel with jigging conveyer behind compressing tablet, under the blowing of the promotion of conveyer and hot blast, be suspended state, moment is expanded, the material grain is expanded evenly, basic original fresh colour, the nothing paste limit of keeping stuck with paste grain and produced, the finished product percentage of damage is less than 0.5%, and moisture content is between 5-8%.Do not return with the congee body of this explained hereafter give birth to, not the anvil tooth, granularity sense, nutritious is arranged, rehydration time short (about 1-3 minute), thus finish the history that expanded instant food can only rely on the screw extrusion explained hereafter.

Below in conjunction with embodiment the present invention is further described.

Embodiment 1, produces corn chuckchuck sound body

The production process concrete operations of corn chuckchuck sound body are as follows:

One, preferred material grain, immersion in good time

Selecting vitreousness for use is the coarsely ground corn of 75-85%, requires slag particle threshing rate 95%, after impurity elimination, cleaning treatment, at ambient temperature, soaks moisture about 31-32% about 120 minutes.

Two, steam slaking

Utilizing conveyer to deliver to the steam box that filters steam the qualified maize pulp of immersion steams, the maize pulp online at conveyor chain directly penetrated by steam, adjust the chain speed of service, and the maintenance steam box in curing temperature 100-110 ℃, curing time 43-47 minute, under the situation of conveyer continuous running, the complete slaking of maize pulp, the about 33-35% of water content of institute can enter next procedure.

Three, heated-air drying, fast dewatering

Maize pulp heated-air drying after the slaking promptly utilizes conveyer to make its dry channel that hot blast jet pipe is arranged through the top continuously, and the outlet temperature of hot blast jet pipe is 50-52 ℃.Carry on maize pulp limit after the slaking, and the limit is blown by hot blast in passage, and institute's quick speed of water content is distributed, and cools off after the drying, to be cooled to the room temperature with tablet press machine with corn slag particle tablet forming, the thick about 0.5-0.6mm of sheet.Maize pulp behind the compressing tablet continues by the further blowing hot-air drying of conveyer, and the outlet temperature of hot blast jet pipe is 80-82 ℃.Be cooled to room temperature again.The slaking maize pulp is through twice heated-air drying, cooling, and institute's water content reaches the bulking process demand substantially about 21-23%.

Four, the hot blast normal pressure is expanded

To deliver to that to carry out hot blast in the constant-pressure and high-temperature tunnel expanded through the maize pulp of redrying, cooled dehydrated with jigging conveyer, swelling temperature is maintained at about 200-205 ℃.Hot blast directly blows to by the maize pulp of compressing tablet by the ejection of the combination nozzle in the high temp tunnel, blowing of vibration that produces when moving and hot blast along with conveyer, make it present suspended state, and moment finish expanded, expanded back is sent to cooling tunnel with conveyer, is cooled to room temperature, avoids the high-temperature hot-air waste heat that the maize pulp after expanded is caused fire damage, thereby guarantee that it is graininess after expanded, keep its granularity sense.The congee system becomes the back packed for standby use, so that batching is made instant gruel.

Hot blast normal pressure bulking process of the present invention is compared with traditional screw extrusion technology, and good effect is outstanding, and its key technical indexes sees Table 1:

Table 1

Project	Bulking process of the present invention	Screw extrusion technology
			Rehydration	＜3 minutes	10-15 minute
Shelf-life	24 months	6-12 month
			Curing degree	100% (under the normal pressure)	80-90% (under the high pressure)
Moisture content (%)	8	10

Processing method according to embodiment 1, can adopt the granular paddy metric system of high-quality to become congee bodies such as rice, sorghum rice, shelled buckwheat, black rice, just according to its requirement and shape separately, suitably control material grain compressing tablet thickness is between 0.5-0.9mm, adjust hot blast temperature, conveyor speed etc., technological parameter and index see table 2 for details, this not one by one Redundant state.

Table 2

	Soak time min	Soak back moisture content %	Curing temperature ℃	Curing time min	Moisture content % after the slaking
						The rice congee body	120	28-30	100-110	30-32	34-36
Jowar congee body	150	28-30	100-110	55-65	34-36
						The kasha body	30	25-27	100-110	30-32	44-46
Black rice congee body	120	25-27	100-110	55-60	29-31

	Primary drying temperature ℃	Moisture content % behind the primary drying	Compressing tablet thickness min	Redrying temperature ℃	Moisture content % after the redrying	Swelling temperature ℃
							The rice congee body	70-72	24-26	0.8-0.9	80-82	16-18	195-200
Jowar congee body	50-52	29-31	0.6-0.7	85-90	12-14	203-207
							Shelled buckwheat congee body	70-72	34-36	0.7-0.8	85-90	12-14	190-195
Black rice congee body	35-40	26-28	0.5-0.6	80-82	11-13	180-185

Claims (4)

1, a kind of processing method that makes things convenient for the chuckchuck sound body, it is characterized in that at first selecting for use vitreousness is that the granular high-quality paddy rice of 75-85% is raw material, through impurity elimination, cleaning treatment, soaked at ambient temperature 30-150 minute, utilize the superheated steam slaking then, curing temperature 100-110 ℃, curing time 20-65 branch, paddy rice after the slaking utilizes conveyer that the dry channel of hot blast jet pipe is arranged through the top continuously, carry on the limit, and limit blowing hot-air drying will be expected the grain tablet forming after cooling, continue by the further blowing hot-air drying of conveyer, after cooling it is delivered to the constant-pressure and high-temperature tunnel with jigging conveyer, the hot blast of combination nozzle in high temp tunnel ejection blows down, and it is expanded that material is suspension moment, and be sent to cooling tunnel with conveyer, be cooled to room temperature and get product.

2, method according to claim 1, the outlet temperature that it is characterized in that described hot blast jet pipe is 35-95 ℃.

3, method according to claim 1 is characterized in that described material grain compressing tablet thickness is 0.5-0.9mm.

4, method according to claim 1 is characterized in that granular high-quality paddy rice selects maize pulp, rice, sorghum rice, shelled buckwheat, black rice for use.