CN103478404A - Method and device applied to drying process of soybean protein isolate - Google Patents

Abstract

Disclosure of the invention The invention relates to a heating method in the drying process of soybean protein isolate, which uses hot flue gas from a coal-fired furnace to replace the hot steam generated by a steam engine in a traditional device. A heat pipe hot air furnace is used as a hot air source in the process of producing soybean protein isolate. The heat pipe of the heat pipe hot blast stove is mainly composed of three parts: a sealed tube and a liquid-absorbing core. The heat pipe adopts phase-changing heat transfer, which has extremely high heat transfer efficiency. Both sides of the heat pipe are equipped with enhanced heat transfer fins, and the heat pipe stove adopts a gas-gas heat exchanger. The heat exchanger shell is divided into two parts by a partition to form a flow channel for high-temperature flue gas and cold air, and all the heat exchange between the two fluids is moved outside the tube, and the heat is transferred through the heat transfer heat tube bundle. convert. The flue gas at 850-950°C enters the heat pipe heat exchanger and exchanges heat with the -20-30°C cold air entered by the blower. The flue gas drops from 850-950°C to about 160°C, and the cold air rises to 160-250°C °C, and finally the gas at about 160 °C is sent to the spray drying tower for spray drying.

Description

A method and device used in the drying process of soybean protein isolate

technical field

The invention relates to a heating method in the drying process of soybean protein isolate, and a device hot air source-heat pipe hot air stove. the

Background technique

Soybean Protein Isolate is a full-price protein food additive produced from low-temperature desolvated soybean meal. The protein content of soybean protein isolate is more than 90%, and there are nearly 20 kinds of amino acids, which contain essential amino acids for human body. Its functional properties mainly include emulsification, hydration, oil absorption, gelling, solubility, foaming, viscosity, agglomeration, conjunctiva, toning, etc. the

Spray drying is an important unit in the production process of soybean protein isolate. Its process is to use clean hot air to granulate (atomize) the protein curd and remove moisture instantly. The biggest advantage of spray drying: short drying time, low outlet temperature, and maximum protection of heat-sensitive components. The effect of spray drying directly determines the quality and functionality of the final product. The traditional drying process uses a steam boiler, which has the disadvantages of high energy consumption, low heat transfer coefficient, more equipment required, water consumption, high noise, and high operating costs. the

Contents of the invention

The purpose of the present invention is to solve the problems in the above-mentioned prior art, research and provide a method and device for the drying process of producing soybean protein isolate, so as to achieve the purposes of improving heat exchange efficiency, saving money, and reducing pollution. the

The object of the present invention is achieved in this way: a heating method for the drying process of soybean protein isolate is to directly use the hot flue gas (850-950°C) produced by the coal-fired boiler to replace the hot air (160-250°C) produced by the traditional steam engine ℃). The high-temperature flue gas is exchanged with cold air to obtain hot air with a suitable drying temperature for spray drying. the

A heat pipe hot blast stove device to replace the traditional hot blast source (steam stove). The heat pipe of this heat pipe hot blast stove mainly consists of a sealed tube and a liquid-absorbing core. The heat pipe adopts heat transfer in disguise, has extremely high heat transfer efficiency, and is known as a thermal superconductor. Both sides of the heat pipe are equipped with enhanced heat transfer fins, and the number of heat pipes depends on the amount of heat exchange. According to the different types of fluid passing through the heat exchanger, the single-tube combined heat pipe heat exchanger can be divided into three types: gas-gas, gas-liquid, and gas-steam. Our heat pipe stove uses a gas-gas heat exchanger. The heat exchanger shell is divided into two parts with a partition plate to form a flow channel for high-temperature flue gas and cold air, and all the heat exchange between the two fluids is moved to the outside of the tube, and the heat is converted through the heat transfer heat tube bundle. . When the high-temperature flue gas and cold air flow in opposite directions in their respective channels at the same time, the heat pipe transfers the heat of the high-temperature flue gas to the cold air, realizing the heat exchange between the high-temperature flue gas and the cold air. It can also set heat pipes at different temperatures according to the temperature of the heated air, so that the heat pipes can work in the most suitable temperature zone. the

The beneficial effects of the present invention are: less investment, energy saving, environmental protection, fuel saving, electricity saving, water saving, no need for water treatment, feed water pump, condensate water tank, thermal degasser, economizer, continuous blowdown expander, steam trap, noise reduction Low cost, less operation, low maintenance and operating costs, safe, long-term continuous operation, high thermal efficiency, good overall performance, no scaling, good frost resistance, easy automatic control, etc. the

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present invention. the

Detailed ways

Embodiment 1: This heating method used in the drying process of soybean protein isolate is to directly use the hot flue gas (850-950°C) produced by the coal-fired boiler to replace the hot air produced by the traditional steam engine. The high-temperature flue gas is exchanged with cold air to obtain hot air (160-250°C) suitable for drying temperature, and then spray-dried. the

Specific embodiment two: As shown in Figure 1, this embodiment includes a hot blast stove (1), a heat pipe heat exchanger (2), an air filter (3), a blower (4), a dust collector (5), and a boiler induced draft fan (6), chimney (7), spray drying tower (8), Sacron group separator (9), and exhaust fan (10). As shown in the figure, the hot blast stove (1) is connected to the heat pipe heat exchanger (2). While the heat pipe heat exchanger (2) is connected to the air filter (3), it is also directly connected to the mist drying tower (8). The dust remover (5) is also connected with the heat pipe heat exchanger (2) to ensure the cleanliness of the incoming gas. the

This embodiment ensures that the flue gas is exchanged to the required temperature through the heat transfer fins in the heat pipe heat exchanger (2), greatly reduces the number of heat pipes, and improves the heat exchange efficiency.

Specific implementation method three: As shown in Figure 1, the coal-fired boiler produces high-temperature flue gas, and the flue gas at 850-950 °C enters the heat pipe heat exchanger (2) and the -20-30 °C flue gas entered by the blower (4) The cold air contacts each other to exchange heat, so that the flue gas drops from 850-950°C to about 160°C, while the cold air rises to 160-250°C, and the finally obtained gas at about 160°C is sent to the spray drying tower (8) Ready for spray drying. the

Embodiment 4: As shown in Figure 1, the high-temperature air temperature of the spray drying tower (8) is 160-250°C, and the most commonly used medium pressure is 2.3MPa-2.6MPa. the

Claims (4)

1. heating means for the soybean protein isolate dry run are hot-airs that the hot flue gas (850-950 ℃) that directly utilizes coal-burning boiler to produce replaces traditional steam engine to produce; High-temperature flue gas, by with the cold air heat exchange, obtaining being applicable to the hot-air (160-250 ℃) of baking temperature, carries out spray-drying.

2. the heat pipe hot-blast stove of the hot air source for the production of the soybean protein isolate process, is characterized in that comprising hot-blast stove (1), heat exchange of heat pipe (2), air cleaner (3), air blast (4), deduster (5), boiler induced-draft fan (6), chimney (7), spray drying tower (8), cyclone group separator (9), moisture-eliminating blower (10); Hot-blast stove (1) is connected with heat exchange of heat pipe (2) as described in Figure; Heat exchange of heat pipe (2) also directly is connected with mist drying tower (8) when being connected with air cleaner (3); Deduster (5) also is connected with heat exchange of heat pipe (2) and guarantees to pass into the cleanliness factor of gas; The embodiment of heat pipe hot-blast stove has guaranteed that flue gas is extremely temperature required by heat exchange by the thermofin in heat exchange of heat pipe (2), and has greatly reduced heat pipe quantity, has improved heat exchange efficiency.

3. according to claim 1, coal-burning boiler has produced the flue gas of high temperature, 850-950 ℃ of flue gas enter in heat exchange of heat pipe (2) with by air blast (4), entered-cold air of 20-30 ℃ is in contact with one another heat exchange, make flue gas drop to 160 ℃ of left and right by 850-950 ℃, and cold air is elevated to 160-250 ℃, the gas of 160 ℃ of left and right that finally obtain is transferred in spray drying tower (8) and uses in order to spray-drying.

4. according to claim 1, spray drying tower (8) high temperature air temperature is 160-250 ℃, and the middle pressure the most often adopted is 2.3MPa-2.6MPa.

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