Corn steep liquor dry powder production equipment

Abstract

The corn steep liquor dry powder production equipment comprises a low-temperature vacuum concentrator, an evaporation concentration system with a heat pump system and a vacuum liquid belt dryer, and the low-temperature vacuum concentrator comprises a heating shell sleeve, a heating roller, a driving motor, a heat source inlet and outlet and a concentrator inner cavity moisture-containing gas outlet; the evaporation and concentration system comprises a corn steep liquor evaporation separator and a heat pump system; the vacuum liquid belt dryer comprises a main barrel, a condenser, a vacuum unit, a feeding pump, a feeding nozzle, a drying belt and a heating flat plate. The corn steep liquor concentration device is high in corn steep liquor concentration efficiency, good in concentration effect, low in energy consumption and free of waste gas pollution, active ingredients of corn steep liquor are well kept, and the product quality is excellent.

Description

TECHNICAL FIELD

[0001] The utility model relates to food chemical technology field, specifically point to a corn steep liquor dry powder production equipment. BACKGROUND

[0002] Corn steep liquor powder (CSLP) is a powder product made from corn steep liquor, which is the soaking liquid in the corn starch production process, through processes such as filtration, concentration, drying, and packaging. It is rich in protein, amino acids, vitamins, minerals, and growth factors, making it a high-value natural fermentation nitrogen source and nutritional supplement.

[0003] Corn steep liquor powder contains 40%-60% protein (mainly soluble protein, easily absorbed), is rich in B vitamins (biotin, pantothenic acid, etc.), organic acids (lactic acid), and minerals (phosphorus, potassium, magnesium). It also contains natural growth factors essential for microbial growth, promoting microbial metabolism.

[0004] Corn steep liquor powder has good water solubility, fine powder, and is easily dissolved in water, making it suitable for liquid or solid fermentation medium preparation.

[0005] In the biological fermentation industry, corn steep liquor powder can be used as a source of nitrogen and growth factors for the production of antibiotics such as penicillin and streptomycin, for the fermentation of amino acids such as glutamic acid and lysine, and for the cultivation of enzyme preparations such as amylase and protease.

[0006] In the food industry, corn steep liquor powder can replace part of the soybean meal or bran, and be used for the fermentation of condiments such as soy sauce and vinegar to enhance the umami flavor. It can also optimize the cost of the culture medium and be used for the cultivation of probiotics such as yogurt and lactic acid bacteria.

[0007] In the feed industry, corn steep liquor powder can be used as a feed additive for aquatic and livestock animals to supplement protein and vitamins and enhance animal immunity.

[0008] In other fields, it can also be used as a fermentation accelerator for organic fertilizers and a medium for biological pesticides.

[0009] The production process of corn steep liquor powder mainly includes steps such as raw material pretreatment, concentration, and drying, aiming to convert corn steep liquor into a powder product that is easy to store and transport.

[0010] Existing corn steep liquor concentration uses multi-effect evaporators or thin film evaporators, or MVR evaporation concentration, to concentrate corn steep liquor from about 50%-60% to 30%-40%. Using these devices, corn steep liquor cannot be further concentrated after being concentrated to 30%-40% moisture. Further concentration increases the viscosity of the material, resulting in poor concentration efficiency and phenomena such as pipe blockage and equipment scaling.

[0011] And the corn syrup drying using spray drying high energy consumption, evaporation of a ton of water needs about 3 tons of steam, converted into 1 tons of corn syrup dry powder, about 2.6-2.8 tons / tons of corn syrup.

[0012] Spray drying using hot air, a large amount of waste gas, the main components of waste gas are: particulate matter, odor substances such as lactic acid, volatile components, and temperature is usually 80-120℃ high temperature and humidity gas. Exhaust gas must be purified before discharge, environmental protection cost is high. The utility model discloses to solve the technical problems that:

[0013] The utility model discloses to solve the technical problems that:

[0014] The utility model discloses a technical scheme:

[0015] A corn syrup dry powder production equipment, including low temperature vacuum concentrator, evaporative concentration system with heat pump system and vacuum liquid belt dryer, the low temperature vacuum concentrator includes heating shell, heating roller, drive motor, shell heat source import, shell heat source export, roller heat source import, roller heat source export, concentrated machine inner chamber contains humid gas outlet, and heating roller is installed in the low temperature vacuum concentrator inner chamber, the heating shell is the circular sleeve that wraps in the casing, and the heating roller is the cavity that has the heat source flow through for the roller itself, and the circular sleeve of heating shell has shell heat source export and shell heat source import respectively at both ends, and one end of heating roller is connected with roller heat source import and roller heat source export simultaneously, the low temperature vacuum concentrator still has circulating liquid import, and the outlet end of pump still connects the circulating liquid import of low temperature vacuum concentrator through connecting pipeline and circulating liquid control valve,

[0016] The evaporative concentration system with heat pump system includes the evaporative separator of being equipped with the corn syrup to be evaporated and concentrated and heat pump system, the heat pump system includes condenser, compressor, evaporator, throttling control valve, condensate tank, the gas phase output pipeline of evaporative separator top end connects the condensing input end of condenser, the condensing output end of condenser connects condensate tank, the heat exchange output end of condenser connects compressor input end, the heat exchange output end of evaporator connects the input end of throttling control valve, the heat exchange input end of condenser connects the output end of throttling control valve, the concentrated liquid phase output end of evaporative separator is circulated after the heat exchange of evaporator, and the bottom end output of evaporative separator is circulated by circulating pump, and the concentrated corn syrup of evaporative separator bottom end is output by the discharge pump,

[0017] The vacuum liquid belt dryer comprises a dryer main cylinder, a dryer condenser, a vacuum unit, a feeding pump, a feeding pipeline, a feeding nozzle, a drying belt, a heat source and a heating flat plate, the drying belt is installed in the closed dryer main cylinder, the vacuum unit draws vacuum for the dryer condenser and the dryer main cylinder through a vacuum pipeline, the feeding pump is connected with the feeding nozzle through the feeding pipeline, corn syrup is injected into the feeding nozzle through the feeding pipeline after being pressurized by the feeding pump, and finally the corn syrup is sprayed onto the running drying belt through the feeding nozzle, the heating flat plate is installed below the drying belt, the heat source supplies heat to the heating flat plate, the bottom of the tail end of the dryer main cylinder is provided with a corn syrup dry powder discharge port, and the gas phase outlet at the top of the dryer main cylinder is connected with one end of the dryer condenser.

[0018] The utility model discloses a prominent substantial feature and remarkable effect:

[0019] Use heat pump evaporation concentration process:

[0020] Recover the gas phase condensation latent heat generated in the evaporation process, and use it again for the evaporation of the corn syrup stock solution, which reduces the energy consumption by more than 80% compared with single-effect evaporation and more than 60% compared with multi-effect evaporation, greatly reducing the energy consumption of original single-effect evaporation or double-effect evaporation or multi-effect evaporation.

[0021] The corn syrup evaporation, condensation cooling, condensate recovery and cooling use cooling water and a heat source for heating, and share a heat exchanger, but they are two different systems and do not directly contact each other. Therefore, it will not cause pollution of the corn syrup material.

[0022] Use the concentrator and liquid belt dryer of the present application:

[0023] Using the concentrator of the present application, the concentration of corn syrup can be increased from about 40% to 80-85%, greatly reducing the load of the later drying. At the same time, the evaporation temperature is low, which can maintain the activity of the heat-sensitive active ingredients in the corn syrup, and will not cause the loss of the heat-sensitive active ingredients in the corn syrup.

[0024] Using the liquid belt dryer of the present application, drying can be carried out at low temperature, maintaining the activity of the heat-sensitive active ingredients in the corn syrup, and at the same time, the energy consumption required for drying is low, only 1.1-1.2 tons of steam is consumed per ton of water evaporated.

[0025] The original spray drying requires high steam consumption, about 3 tons of steam per ton of corn syrup dry powder.

[0026] After using the present application, the steam consumption of corn syrup dry powder is reduced to less than 1.2 tons per ton, and at the same time, the activity of the heat-sensitive active ingredients in the corn syrup dry powder is maintained.

[0027] The operation is under vacuum condition, no external air is introduced, the waste gas treatment amount in later stage is greatly reduced, the corn syrup dry powder product yield is high, and the environmental protection treatment cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Structure diagram of evaporation concentration system with heat pump system;

[0029] Figure 2 Structure diagram of low-temperature vacuum concentrator;

[0030] Figure 3 Structure diagram of vacuum liquid belt dryer.

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 1-evaporation separator, 2-condenser, 3-compressor, 4-evaporator, 5-throttle control valve, 6-condensate tank, 7-circulation pump, 8-discharge pump, 9-feed pump, 10-low-temperature vacuum concentrator, 11-driving motor, 12-heating roller, 13-corn syrup inlet, 14-concentrated corn syrup outlet, 15-shell heat source inlet, 16-shell heat source outlet, 17-roller heat source inlet, 18-roller heat source outlet, 19-heating shell, 20-gas-liquid separation chamber, 21-gas phase pipe, 22-vacuum system, 23-gauge, 24-dryer main cylinder, 25-dryer condenser, 26-vacuum unit, 27-dryer feed pump, 28-feed pipeline, 29-feed nozzle, 30-corn syrup dry powder discharge port, 31-vacuum pipeline, 32-heat source, 33-heating flat plate, 34-drying belt, 35-solvent recovery tank. DETAILED DESCRIPTION

[0033] EMBODIMENT

[0034] Concentration:

[0035] In a low-temperature concentrator with a heat exchange area of 3 square meters, 108 kg of corn syrup with a solid content of 41% was added, under the conditions of vacuum degree: -0.09 MPa, heating water temperature 76℃, condenser condensate temperature 5℃, roller speed 25 Hz, the evaporation temperature was 50℃.

[0036] After 70 minutes of concentration, 54 kg of condensate water was collected, 54 kg of discharge was collected, and the solid content of the discharge was 82%. The concentrated material was paste-like, relatively viscous, and had poor flowability.

[0037] Drying:

[0038] The concentrated material is pumped into a two-layer vacuum liquid belt dryer with a heat exchange area of 10 square meters, the vacuum degree of the liquid belt dryer is controlled at -0.099 MPa; the feeding pump frequency is controlled at 26 Hz for the first layer and 30 Hz for the second layer; the temperature of the heat-conducting oil for heating and cooling is controlled, the entering temperature of the oil for heating zone one is controlled at 110°C, the entering temperature of the oil for heating zone two is controlled at 90°C, and the entering temperature of the oil for cooling zone three is controlled at 40°C; the running frequency of the belt motor is controlled, the belt motor frequency is controlled at 12 Hz for the first layer and the second layer. Before discharging, the material is crushed by a crusher, and the screen mesh aperture of the crusher is selected to be 2 mm.

[0039] The total running time of the material on the belt is controlled at 45 min.

[0040] After drying, the material is in the shape of bread and is relatively brittle, and is discharged after being crushed by a crusher. The corn syrup dry powder is detected to have a water content of 4.8%.

[0041] Example

[0042] Concentration:

[0043] In a low-temperature concentrator with a heat exchange area of 3 square meters, 57.5 kg of corn syrup with a solid content of 40% is added, the vacuum degree is -0.096 MPa, the heating water temperature is 76°C, the condenser condensate water temperature is 5°C, the roller speed is 25 Hz, and the evaporation temperature is 40°C. After 40 min of concentration, 29.5 kg of condensate water is collected, and 28 kg of material is discharged, with a solid content of 82%. The concentrated material is in the shape of paste and is relatively viscous and has poor flowability.

[0044] Drying:

[0045] The concentrated material is pumped into a two-layer vacuum liquid belt dryer with a heat exchange area of 10 square meters, the vacuum degree of the liquid belt dryer is controlled at -0.099 MPa; the feeding pump frequency is controlled at 26 Hz for the first layer and 30 Hz for the second layer; the temperature of the heat-conducting oil for heating and cooling is controlled, the entering temperature of the oil for heating zone one is controlled at 110°C, the entering temperature of the oil for heating zone two is controlled at 90°C, and the entering temperature of the oil for cooling zone three is controlled at 40°C; the running frequency of the belt motor is controlled, the belt motor frequency is controlled at 12 Hz for the first layer and the second layer. Before discharging, the material is crushed by a crusher, and the screen mesh aperture of the crusher is selected to be 2 mm.

[0046] The total running time of the material on the belt is controlled at 45 min.

[0047] The material foams stably during the distribution process, and the product is in the shape of a cake and is relatively brittle. The product is discharged after being crushed by a crusher, and the corn syrup dry powder is detected to have a water content of 5.6%.

[0048] Example

[0049] Concentration:

[0050] The low-temperature concentrator with a heat exchange area of 3 square meters is added with corn syrup with a solid content of 40%, 94 kg, under the conditions of vacuum degree: -0.093 MPa, heating water temperature 76℃, condenser condensate water temperature 5℃, roller speed 20 Hz, evaporation temperature 44℃, and concentration time 45 min, 44.5 kg of condensate water is collected, and 49.5 kg of discharge is obtained, with a solid content of 76%. The concentrated material is paste-like, relatively viscous, and has poor flowability. The flowability of the concentrated material is very poor below 30 degrees, and the adhesion is relatively strong.

[0051] Drying:

[0052] The concentrated material is pumped into a two-layer vacuum liquid belt dryer with a heat exchange area of 10 square meters, the vacuum degree of the liquid belt dryer is controlled at -0.099 MPa, the feeding pump frequency is controlled at 15 Hz for the first layer and 18 Hz for the second layer, the heating and cooling heat conducting oil temperature is controlled, the heating zone one is controlled at 100℃, the heating zone two is controlled at 100℃, the heating zone three is controlled at 70℃, the cooling zone four is controlled at 24℃, and the frequency of the track motor is controlled at 16 Hz for the first layer and the second layer. Before discharging, the material is crushed by a crusher with a screen mesh size of 0.8 mm.

[0053] The total running time of the material on the track is controlled at 45 min.

[0054] The product is bread-like and brittle, and the corn syrup dry powder has a moisture content of 4.0% after detection.

[0055] Referring to Figure 1 , the heat pump evaporation process uses an evaporation concentration system with a heat pump system to evaporate and concentrate corn syrup, the evaporation concentration system includes an evaporation separator containing corn syrup to be evaporated and concentrated and a heat pump system, the heat pump system includes a condenser, a compressor, an evaporator, a throttling control valve, and a condensate tank, the gas phase output pipeline at the top end of the evaporation separator is connected to the condensing input end of the condenser, the condensing output end of the condenser is connected to the condensate tank, the heat exchange output end of the condenser is connected to the input end of the compressor, the output end of the compressor is connected to the heat exchange input end of the evaporator, the heat exchange output end of the evaporator is connected to the input end of the throttling control valve, and the output end of the throttling control valve is connected to the heat exchange input end of the condenser; the concentrated liquid phase output end of the evaporation separator is circulated by the circulating pump and the bottom end output of the evaporation separator after heat exchange by the evaporator, and the concentrated corn syrup at the bottom end of the evaporation separator is output by the discharge pump.

[0056] Referring to Figures 1-3 , the corn syrup dry powder production equipment includes a low-temperature vacuum concentrator, an evaporation concentration system with a heat pump system, and a vacuum liquid belt dryer. Figure 3The low-temperature vacuum concentrator shown comprises a heating shell, a heating roller, a driving motor, a shell heat source inlet, a shell heat source outlet, a roller heat source inlet, a roller heat source outlet, a concentrator inner cavity moisture-containing gas outlet, and the heating roller is installed in the inner cavity of the low-temperature vacuum concentrator; the heating shell is a circular sleeve wrapped on the shell, the heating roller has a cavity for the circulation of a heat source, the circular sleeve of the heating shell has the shell heat source outlet and the shell heat source inlet at the upper and lower ends respectively, and the heating roller is connected with the roller heat source inlet and the roller heat source outlet at one end; the low-temperature vacuum concentrator further has a circulating liquid inlet, and the outlet end of the pump is further connected with the circulating liquid inlet of the low-temperature vacuum concentrator through a connecting pipeline and a circulating liquid control valve.

[0057] Figure 1 The evaporation concentration system with a heat pump system shown comprises an evaporation separator for evaporating and concentrating corn slurry and a heat pump system, the heat pump system comprises a condenser, a compressor, an evaporator, a throttling control valve, and a condensate tank, a gas phase output pipeline at the top end of the evaporation separator is connected with a condensing input end of the condenser, a condensing output end of the condenser is connected with the condensate tank, a heat exchange output end of the condenser is connected with an input end of the compressor, an output end of the compressor is connected with a heat exchange input end of the evaporator, a heat exchange output end of the evaporator is connected with an input end of the throttling control valve, and an output end of the throttling control valve is connected with a heat exchange input end of the condenser; after the concentrated liquid phase output end of the evaporation separator is subjected to heat exchange through the evaporator, the concentrated liquid phase is circulated by a circulating pump and the bottom end output of the evaporation separator, and the concentrated corn slurry at the bottom end of the evaporation separator is output by a discharge pump.

[0058] Figure 3 The vacuum liquid belt dryer shown comprises a dryer main cylinder, a dryer, a dryer condenser, a vacuum unit, a feeding pump, a feeding pipeline, a feeding nozzle, a drying belt, a heat source, and a heating flat plate, the drying belt is installed in the closed dryer main cylinder, the vacuum unit performs vacuumization on the dryer condenser and the dryer main cylinder through a vacuum pipeline, the feeding pump is connected with the feeding nozzle through the feeding pipeline, the corn slurry is pressurized by the feeding pump, injected into the feeding nozzle through the feeding pipeline, and finally sprayed onto the running drying belt by the feeding nozzle, the flat plate is installed under the drying belt, the heat source supplies heat to the heating flat plate, the dryer main cylinder has a corn slurry dry powder discharge port at the bottom of the tail end, a gas phase outlet at the top of the dryer main cylinder is connected with one end of the condenser, and the other end of the condenser is connected with a solvent recovery tank.

Claims

1. A corn steep liquor powder production equipment, characterized in that: This includes a low-temperature vacuum concentrator, an evaporation and concentration system with a heat pump, and a vacuum liquid belt dryer. The low-temperature vacuum concentrator includes a heating shell, a heating roller, a drive motor, a shell heat source inlet, a shell heat source outlet, a roller heat source inlet, a roller heat source outlet, and a humid gas outlet within the concentrator cavity. The heating roller is installed within the low-temperature vacuum concentrator cavity. The heating shell is a circular sleeve wrapped around a housing. The heating roller itself has a cavity for heat source circulation. The upper and lower ends of the circular sleeve of the heating shell have a shell heat source outlet and a shell heat source outlet, respectively. The heating roller has a heat source inlet and a roller heat source outlet connected to both ends. The low-temperature vacuum concentrator also has a circulating liquid inlet, and the pump outlet is connected to the circulating liquid inlet of the low-temperature vacuum concentrator via a connecting pipe and a circulating liquid control valve. The evaporation and concentration system with a heat pump includes an evaporator separator containing the corn syrup to be evaporated and concentrated, and a heat pump system. The heat pump system includes a condenser, a compressor, an evaporator, a throttling control valve, and a condensate tank. The gas phase output pipe at the top of the evaporator separator is connected to the condensation input end of the condenser, and the condensation output of the condenser... The condenser's heat exchange output is connected to the compressor's input, the compressor's output is connected to the evaporator's heat exchange input, the evaporator's heat exchange output is connected to the throttling control valve's input, and the throttling control valve's output is connected to the condenser's heat exchange input. The concentrated liquid phase output of the evaporator, after heat exchange in the evaporator, is circulated by a circulating pump to the bottom of the evaporator. The concentrated corn syrup at the bottom of the evaporator is output by a discharge pump. The vacuum liquid belt dryer includes a main dryer cylinder, a dryer condenser, a vacuum unit, a feed pump, a feed pipe, a feed nozzle, and a drying belt. The system consists of a heat source, a heating plate, and a drying belt installed inside the sealed main cylinder of the dryer. A vacuum unit evacuates the dryer condenser and main cylinder through a vacuum pipe. A feed pump is connected to a feed nozzle through a feed pipe. The corn slurry is pressurized by the feed pump and injected into the feed nozzle through the feed pipe. Finally, the feed nozzle sprays the corn slurry onto the operating drying belt. A heating plate is installed under the drying belt, and the heat source supplies heat to the heating plate. The bottom of the main cylinder has a corn slurry powder discharge port. The gas phase outlet at the top of the main cylinder is connected to one end of the dryer condenser, and the other end of the dryer condenser is connected to a solvent recovery tank.

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