A method and device for steam-tempering wheat

Abstract

The invention discloses a method and device for steam-tempering wheat, relates to the technical field of food processing, aims to solve the problem of poor wheat tempering effect at present, and provides the following technical scheme: a method for steam-tempering wheat, comprising the following steps: adding water into a dampening machine according to a preset water addition amount, and adding wheat to be tempered into the dampening machine; starting the dampening machine and a steam boiler connected to the dampening machine, so that the water in the dampening machine, the steam generated by the steam boiler and the wheat in the dampening machine are mixed; detecting the temperature of the wheat after tempering, and adjusting the pressure of the steam boiler based on the temperature of the wheat after tempering, so that the temperature of the wheat after tempering is within a preset temperature range.

Description

Technical Field

[0001] The invention relates to the technical field of food processing, and in particular to a method and a device for steam-tempering wheat. Background Art

[0002] During the wheat flour making process, the wheat needs to be tempered, that is, a certain amount of water is added to the wheat and stored for a certain period of time to make its moisture content reach 15-16%. At this time, the physical state of the wheat changes, that is, the endosperm expands and loosens, the bran becomes soft, and the toughness increases. This process is called "tempering".

[0003] For a long time, the main methods of wheat tempering are normal temperature wheat tempering and heated wheat tempering. Normal temperature wheat tempering means adding normal temperature water to wheat at room temperature for tempering. However, when the temperature is low (such as below 20℃) and / or the wheat temperature is low (such as below 20℃), it is difficult for moisture to enter the wheat. Even if the wheat tempering time is extended (such as 24 hours in summer and 36 hours in winter), the purpose of wheat tempering cannot be achieved. Moreover, due to the long tempering time, the surface moisture of wheat evaporates, the cortex becomes dry and brittle, and the bran in the flour increases. Heated wheat tempering usually uses hot air to heat the wheat, or adds hot water to achieve the purpose of wheat tempering. Since wheat has good heat preservation, the temperature of wheat rises slowly, and the hot air heating time is often long, which consumes a lot of energy, resulting in high costs and unsatisfactory results; although the effect of hot water moistening wheat is better than that of hot air moistening wheat to a certain extent, the heat carried by hot water is limited, and if too much water is added, it is easy to cause high moisture content entering the mill, which in turn leads to unqualified moisture content of flour, so it is difficult to achieve good results by heating wheat moistening. Therefore, the industry generally only uses room temperature moistening wheat regardless of winter or summer, which results in the flour processed in winter being dark pink, high ash content, and more bran stars, and high power consumption during the processing.

[0004] In recent years, some flour mills in the industry have introduced a high-priced vibrating dampening machine from abroad. Although the wheat moistening time can be shortened to 12 to 16 hours, this vibrating dampening machine can only allow moisture to completely enter the wheat grains, while the wheat endosperm does not expand, and the wheat is brittle. The flour making effect is still not ideal, and the pink color is dark. Summary of the invention

[0005] The main purpose of the present invention is to provide a method and device for steam-tempering wheat, aiming to solve the problem of poor wheat tempering effect at present.

[0006] To achieve the above object, the present invention provides a method for steam tempering wheat, comprising the following steps:

[0007] Adding water into the dampening machine according to a preset water addition amount, and adding the wheat to be moistened into the dampening machine;

[0008] Starting the dampening machine and the steam boiler connected to the dampening machine, so that the water in the dampening machine, the steam generated by the steam boiler and the wheat in the dampening machine are mixed;

[0009] The temperature of the wheat after tempering is detected, and based on the temperature of the wheat after tempering, the pressure of the steam boiler is adjusted so that the temperature of the wheat after tempering is within a preset temperature range.

[0010] In one embodiment of the present application, the method for steam tempering wheat further comprises the following steps:

[0011] The temperature of the wheat tempering workshop and / or the temperature of the wheat to be tempered is measured, and the amount of water to be added and / or the pressure of the steam boiler are determined according to the temperature of the wheat tempering workshop and / or the temperature of the wheat to be tempered.

[0012] In one embodiment of the present application, the preset temperature range is 33°C-38°C.

[0013] Based on the same inventive concept, the present invention also provides a device for implementing any of the above-mentioned steam-moistening methods for wheat, comprising a steam boiler and a dampener, characterized in that the steam boiler is connected to the dampener through a steam pipe, the dampener is provided with a feed port, a discharge port and a water inlet, the feed port and the discharge port are respectively arranged at two ends of the dampener along the length direction, a rotating shaft rotating relative to the dampener is provided in the dampener, and a plurality of blades are arranged along the circumference of the rotating shaft.

[0014] In one embodiment of the present application, the dampener is arranged to be inclined relative to the ground.

[0015] In one embodiment of the present application, the distance between the connection point between the steam pipe and the dampener and the feed inlet is 0.3m-0.5m.

[0016] In one embodiment of the present application, the discharge port is further connected to a wheat-conditioning auger, and an end of the wheat-conditioning auger away from the discharge port is provided with a warehouse inlet.

[0017] In one embodiment of the present application, a temperature probe is installed at the discharge port.

[0018] In one embodiment of the present application, the discharge port is provided with a temperature measuring hole, and the temperature measuring hole is correspondingly provided with a cover plate.

[0019] In one embodiment of the present application, the outer walls of the steam pipe, the dampener and / or the wheat-conditioning auger are provided with a heat-insulating layer.

[0020] The invention has the following beneficial effects: compared with hot water and room temperature wheat moistening in the prior art, the wheat moistening method using steam shortens the wheat moistening time to a certain extent, reduces energy consumption, thereby reducing costs, and can also reduce the grayness of subsequent wheat flour products; the rotating shaft in the dampener drives the blades to rotate, thereby driving the wheat in the dampener to rotate along the inner wall of the dampener, so that the water in the dampener and the steam generated by the steam boiler are fully mixed with the wheat in the dampener, and the surface of the wet wheat absorbs the heat of the steam to increase the temperature of the wheat, which is beneficial to further ensure the effect of wheat moistening and can avoid the problem of uneven wheat moistening effects of wheat moistening operations in the same batch; the dampener is inclined, and compared with horizontal placement, the dampener prolongs the wheat moistening time in the dampener to a certain extent, thereby improving the effect of wheat moistening; the rotation of the wheat in the dampener along the inner wall of the dampener is beneficial to the diffusion of heat energy in the dampener, so as to avoid the wheat being scalded by excessive steam temperature; the temperature of the wheat after the moistening is completed is detected, and the pressure of the boiler is adjusted, and then the temperature of the steam is adjusted, which is beneficial to achieving the guarantee of the wheat moistening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only exemplary embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work, among which:

[0022] Figure 1 This is a schematic structural diagram of a steam-tempering wheat device according to Example 1 of the present invention;

[0023] Figure 2 This is a schematic structural diagram of a steam-tempering wheat device according to Example 2 of the present invention;

[0024] Figure 3 It is a partial enlarged view of the dampening machine of the steam-tempering wheat device of Example 2 of the present invention;

[0025] Figure 4 This is a schematic structural diagram of a steam-tempering wheat device according to Embodiment 3 of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of a steam-tempering wheat device according to Example 4 of the present invention.

[0027] Reference numerals include:

[0028] 1 Steam boiler;

[0029] 2 steam pipes;

[0030] 3. Water dampening machine;

[0031] 4 water inlet pipe;

[0032] 5 Feed inlet;

[0033] 6 shafts;

[0034] 7 leaves;

[0035] 8. Discharge port;

[0036] 9 Temperature probe;

[0037] 10. Wheat-Rich Auger;

[0038] 11 Enter the warehouse;

[0039] 12 Steam holes. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only exemplary embodiments of the present invention, not the only embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] The present invention provides a method for steam tempering wheat, comprising the following steps:

[0042] S1 measures the temperature of the tempering room and / or the temperature of the wheat to be tempered, and determines the amount of water to be added and / or the pressure of the steam boiler 1 according to the temperature of the tempering room and / or the temperature of the wheat to be tempered.

[0043] Specifically, before steam tempering, the temperature of the tempering workshop and / or the temperature of the wheat to be tempered is measured first, and the amount of water added and / or the pressure of the steam boiler 1 is determined according to the measured temperature, which is beneficial to improving the efficiency of steam tempering and ensuring the effect of tempering.

[0044] S2: adding water into the dampening machine 3 according to a preset water addition amount, and adding the wheat to be moistened into the dampening machine 3.

[0045] Specifically, the preset water addition amount is determined according to the actual situation, and this embodiment does not impose any specific restrictions. According to the preset water addition amount, water is added to the dampening machine 3 from the water inlet, and the wheat to be tempered is added to the dampening machine 3 from the feed inlet 5, so that the surface of the wheat to be tempered is moistened.

[0046] S3 starts the dampening machine 3 and the steam boiler 1 connected to the dampening machine 3 , so that the water in the dampening machine 3 , the steam generated by the steam boiler 1 and the wheat in the dampening machine 3 are mixed.

[0047] Specifically, the steam boiler 1 is started so that the steam generated by the steam boiler 1 is introduced into the dampening machine 3; the dampening machine 3 is started so that the wheat in the dampening machine 3 rotates along the inner wall of the dampening machine 3 under the rapid stirring of the blades 7 of the dampening machine 3, thereby making the water in the dampening machine 3, the steam generated by the steam boiler 1 and the wheat in the dampening machine 3 fully mixed, thereby achieving the purpose of moistening the wheat.

[0048] S4 detects the temperature of the wheat after tempering, and adjusts the pressure of the steam boiler 1 based on the temperature of the wheat after tempering, so that the temperature of the wheat after tempering is within a preset temperature range.

[0049] Specifically, the wheat in the dampening machine 3 is driven by the blades 7 of the dampening machine 3 to rotate from the end of the dampening machine 3 close to the feed port 5 to the discharge port 8, and is discharged from the dampening machine 3 through the discharge port 8, which is considered to be completed. The temperature of the wheat after the dampening is detected, and the pressure of the steam boiler 1 is adjusted according to the temperature of the wheat after the dampening, so as to adjust the temperature of the steam generated by the steam boiler 1 to ensure that the temperature of the wheat after the dampening is within a preset temperature range. The preset temperature range is set according to actual conditions.

[0050] Preferably, the temperature of the wheat after tempering is detected in real time, and the pressure of the steam boiler 1 is automatically adjusted by PLC according to the detected temperature of the wheat after tempering. The preset temperature range is preferably 33°C-38°C, so that the temperature of the wheat at the warehouse inlet 11 is maintained between 28°C and 35°C, thereby ensuring the tempering effect.

[0051] like Figure 1-Figure 4 As shown, the present invention also provides a steam-tempering wheat device, which comprises a steam boiler 1, a dampener 3 and a wheat-tempering auger 10 in sequence, and the specification of the steam pipe 2 is preferably a galvanized pipe of G25-G50.

[0052] Embodiment 1:

[0053] like Figure 1 As shown, in this embodiment, a vertically arranged steam boiler 1 is used, and the steam boiler 1 is arranged on the same floor as the dampener 3 to reduce the length of the steam pipe 2, reduce costs, and reduce energy loss. The steam boiler 1 and the dampener 3 are connected through the steam pipe 2, and the steam pipe 2 is connected to the outer wall of the dampener 3 to guide the steam generated by the steam boiler 1 into the dampener 3.

[0054] The dampening machine 3 is provided with a feed port 5, a discharge port 8 and a water inlet. The dampening machine 3 is arranged at an inclination relative to the ground. The feed port 5 and the water inlet are both arranged at one end of the dampening machine 3 close to the steam pipe 2. The water inlet is connected to the water inlet pipe 4 for adding water to the dampening machine. The discharge port 8 is arranged at one end of the dampening machine 3 away from the steam pipe 2. The distance between the connection between the steam pipe 2 and the dampening machine 3 and the feed port 5 is preferably 0.3m-0.5m. In order to facilitate the detection of the temperature of the wheat after the moistening operation is completed, preferably, a temperature probe 9 is installed at the discharge port 8, or a temperature measuring hole is opened at the discharge port 8, which is used to manually place a temperature measuring device such as a thermometer into the temperature measuring hole to complete the temperature measurement operation. The temperature measuring hole is provided with a cover plate hinged to the dampening machine 3 or a cover plate detachably connected. The cover plate is used to open or close when manually measuring the temperature to reduce heat loss.

[0055] Preferably, the temperature probe 9 and the pressure regulating device of the steam boiler 1 are connected to a control device such as a PLC to achieve real-time measurement of the temperature of the wheat that has been tempered at the discharge port 8, and adjust the pressure of the steam boiler 1 based on the temperature of the wheat that has been tempered at the discharge port 8, thereby achieving the purpose of automatically and dynamically adjusting the pressure of the steam boiler 1 to ensure that the temperature of the wheat that has been tempered at the discharge port 8 is within a preset temperature range.

[0056] The interior of the dampening machine 3 is provided with a rotating shaft 6 that rotates relative to the dampening machine 3, and a plurality of blades 7 are arranged along the circumference of the rotating shaft 6. The dampening machine 3 is connected to a motor, and the motor is used to drive the rotating shaft 6 to rotate, thereby driving the blades 7 to rotate. By adjusting the rotation speed of the motor, the moistening time of the wheat in the dampening machine 3 can be controlled.

[0057] The discharge port 8 of the dampening machine 3 is also connected to a wheat tempering auger 10. An end of the wheat tempering auger 10 away from the discharge port 8 is provided with a bin inlet 11. The bin inlet 11 is arranged corresponding to the wheat bin, such as being connected to the top of the wheat bin, for storing the tempered wheat in the wheat bin.

[0058] In order to reduce heat dissipation, reduce heat loss, and maintain the temperature of the wheat within a preset temperature range, the outer walls of the steam pipe 2, the dampening machine 3, and the wheat-smoothing auger 10 are all provided with a heat-insulating layer.

[0059] Embodiment 2:

[0060] like Figure 2-Figure 3 As shown, the steam pipe 2 passes through the outer wall of the dampener 3 and is connected to the rotating shaft 6. The rotating shaft 6 is a hollow rotating shaft, and a plurality of steam holes are provided on the surface of the rotating shaft 6. The steam generated by the steam boiler 1 flows into the interior of the rotating shaft 6 from the steam pipe 2 in sequence, and flows out from the steam holes 12 to be mixed with the wheat in the dampener 3. The rest of the structure is the same as that of Example 1. The above technical solution is adopted to facilitate the full mixing of steam with the wheat in the dampener 3 and improve the efficiency of moistening the wheat.

[0061] Embodiment 3:

[0062] like Figure 4 As shown, the steam pipe 2 includes several branches connected to the dampener 3, which are used to introduce steam into the dampener 3 from multiple positions of the dampener 3 at the same time, thereby improving the efficiency of steam introduction and fully mixing the wheat in the dampener 3 with the steam. The rest of the structure is the same as that of Example 1.

[0063] Embodiment 4:

[0064] like Figure 5 As shown, the steam boiler 1 is connected to the dampening machine 3 located on different floors for easy use. The steam pipe 2 is connected to the dampening machine 3 to introduce steam into the dampening machine 3. The steam pipe 2 is connected to the end of the dampening machine 3, thereby reducing the length of the steam pipe 2 and reducing the heat loss to a certain extent. Preferably, the steam pipe 2 is connected to the dampening machine 3 through a turntable, the steam pipe 2 is fixedly connected to the turntable, and the dampening machine 3 rotates relative to the turntable, so that the wheat in the dampening machine 3 is fully mixed with the steam. The rest of the structure is the same as that of Example 1.

[0065] Based on the above-mentioned method for steam-tempering wheat and the device for steam-tempering wheat in Example 1, the beneficial effects of steam-tempering wheat compared with the prior art are further described below.

[0066] Experiment 1:

[0067] 250 tons of wheat need to be tempered every day. A steam boiler 1 with a rated pressure of 0.04Mpa and a rated gas output of 150kg / h is installed in the tempering workshop. The steam boiler 1 and the dampening machine 3 are installed on the same floor. The length of the steam pipe 2 is 8.5m, and the specification of the steam pipe 2 is G40 galvanized pipe.

[0068] The temperature of the wheat tempering room was measured to be 18°C ​​and the temperature of the wheat was 22°C. Based on the above measured temperatures of the wheat tempering room and the wheat, in this experiment, the pressure of the steam boiler 1 was adjusted to 0.025Mpa, the preset water addition amount was 530 liters per hour, and the yield of tempered wheat was 11.5 tons per hour.

[0069] In this experiment, when steam-tempering wheat begins, 530 liters of normal temperature water is first added to the dampening machine 3, and 11.5 tons of wheat to be tempered is added to the dampening machine 3, and the above operation is repeated every hour thereafter. The dampening machine 3 and the steam boiler 1 are started, so that the water in the dampening machine 3, the steam generated by the steam boiler 1 and the wheat in the dampening machine 3 are mixed. The temperature of the wheat after tempering and the temperature of the wheat at the warehouse inlet 11 are detected in real time by a temperature probe or other temperature measuring device. At this time, the measured temperature of the wheat after tempering, i.e., the wheat temperature at the outlet 8 of the dampening machine 3, is 35°C, and the wheat temperature at the warehouse inlet 11 is 32°C. The product results of the steam-tempering method are compared with the product results of the normal temperature and hot water tempering methods as shown in Table 1.

[0070] Table 1:

[0071]

[0072] Experiment 2:

[0073] Experiment 2 and Experiment 1 were conducted on the same production line. The temperature of the tempering room was measured to be 15°C and the temperature of the wheat was 21°C. Based on the above-mentioned measured temperatures of the tempering room and the wheat, in this experiment, the pressure of the steam boiler 1 was adjusted to 0.03Mpa, the preset water addition amount was 520 liters per hour, and the tempering wheat output was 11.3 tons per hour.

[0074] In this experiment, when steam-tempering wheat begins, 520 liters of normal temperature water is first added to the dampening machine 3, and 11.3 tons of wheat to be tempered is added to the dampening machine 3, and the above operation is repeated every hour thereafter. The dampening machine 3 and the steam boiler 1 are started, so that the water in the dampening machine 3, the steam generated by the steam boiler 1 and the wheat in the dampening machine 3 are mixed. The temperature of the wheat after tempering and the temperature of the wheat at the warehouse inlet 11 are detected in real time by a temperature probe or other temperature measuring device. At this time, the measured temperature of the wheat after tempering, i.e., the wheat temperature at the outlet 8 of the dampening machine 3, is 37°C, and the wheat temperature at the warehouse inlet 11 is 33°C. The product results of the steam-tempering method are compared with the product results of the normal temperature tempering and the hot water tempering as shown in Table 2.

[0075] Table 2:

[0076]

[0077] It can be seen from Experiment 1 and Experiment 2 that the F1 flour extraction rate of wheat after steam tempering is obviously higher than that of wheat tempered with hot water or room temperature; the flour produced by steam tempering is obviously lower in grayness and higher in whiteness than that produced by hot water or room temperature; the total flour extraction rate of wheat after steam tempering is also higher than that of hot water or room temperature; and the power consumption and tempering time of steam tempering are lower than those of hot water or room temperature. Therefore, it can be seen that the effect of steam tempering is better than that of hot water or room temperature.

[0078] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A method for steam tempering wheat, characterized in that: A device for implementing the method of steam-moistening wheat comprises a steam boiler (1) and a dampener (3), wherein the steam boiler (1) is connected to the dampener (3) via a steam pipe (2), the dampener (3) is provided with a feed inlet (5), a discharge port (8) and a water inlet, the feed inlet (5) and the discharge port (8) being respectively arranged at two ends of the dampener (3) along the length direction, the dampener (3) is provided with a rotating shaft (6) rotating relative to the dampener (3), and a plurality of blades (7) are arranged along the circumference of the rotating shaft (6); The steam pipe (2) passes through the outer wall of the dampening machine (3) and is connected to the rotating shaft (6); the rotating shaft (6) is a hollow rotating shaft, and a plurality of steam holes are provided on the surface of the rotating shaft (6); the steam generated by the steam boiler (1) can flow from the steam pipe (2) into the interior of the rotating shaft (6) in sequence, and flow out from the steam holes to be mixed with the wheat in the dampening machine (3); The method for steam tempering wheat comprises the following steps: Measuring the temperature of the wheat tempering workshop and the temperature of the wheat to be tempered, and determining the amount of water to be added and the pressure of the steam boiler (1) according to the temperature of the wheat tempering workshop and the temperature of the wheat to be tempered; According to the amount of water added, water is added into the dampening machine (3), and the wheat to be moistened is added into the dampening machine (3); Starting the dampening machine (3) and the steam boiler (1) connected to the dampening machine (3) so that the water in the dampening machine (3), the steam generated by the steam boiler (1) and the wheat in the dampening machine (3) are mixed; Real-time detection of the temperature of the wheat after tempering, and based on the temperature of the wheat after tempering, automatic adjustment of the pressure of the steam boiler (1) so that the temperature of the wheat after tempering is within a preset temperature range; Wherein, the preset temperature range is 33°C-38°C.

2. The method for steam tempering wheat according to claim 1, characterized in that: The dampener (3) is arranged obliquely relative to the ground.

3. The method for steam tempering wheat according to claim 1, characterized in that: The distance between the connection point between the steam pipe (2) and the dampener (3) and the feed port (5) is 0.3m-0.5m.

4. The method for steam tempering wheat according to claim 1, characterized in that: The discharge port (8) is also connected to a wheat-smoothing auger (10), and an end of the wheat-smoothing auger (10) away from the discharge port (8) is provided with a storage opening (11).

5. The method for steam tempering wheat according to claim 1, characterized in that: The discharge port (8) is equipped with a temperature probe (9).

6. The method for steam tempering wheat according to claim 1, characterized in that: The discharge port (8) is provided with a temperature measuring hole, and the temperature measuring hole is correspondingly provided with a cover plate.

7. The method for steam tempering wheat according to claim 4, characterized in that: The outer walls of the steam pipe (2), the dampener (3) and / or the wheat-smoothing auger (10) are provided with a heat-insulating layer.

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