CN214582081U - Flash distillation drying device of fish meal - Google Patents

Abstract

The utility model provides a flash distillation drying device of fish meal, including feeding portion, crushing drying portion, cyclone separation portion, dust removal portion and draught fan, crushing drying portion is connected with the air-blower that can send into the lower part inner chamber of crushing drying portion the air after being heated by the steam condensate water that heat exchange produced in the fish meal production, be provided with the cavity that separates the lower part inner chamber into crushing chamber and air inlet chamber in the inner chamber of lower part and press from both sides the cover, the inner chamber and the coolant pipe that the cavity pressed from both sides the cover are linked together, the air inlet chamber is linked together with the blast orifice of air-blower, be provided with the intercommunication mouth that feeds through crushing chamber and air inlet chamber in the bottom that the cavity pressed from both sides the cover, it is linked together with material import and material export to smash the chamber. The utility model has the advantages that: the hollow jacket can prevent high-temperature hot air entering from the air inlet from directly contacting with the fish meal, so that the fish meal is prevented from being overheated and deteriorated, and the drying effect of the fish meal is good; the waste heat energy generated by the fish meal cooking machine is utilized to heat air, so that the heat source loss is reduced, and the fish meal cooking machine is more energy-saving and environment-friendly.

Description

Flash distillation drying device of fish meal

Technical Field

The utility model relates to a fish meal preparation technical field especially indicates a flash drying device of fish meal.

Background

The traditional Chinese patent application with the application number of CN201110279412.X, namely 'a method for drying sludge by cyclone flash evaporation and drying equipment thereof' discloses a method for drying sludge by cyclone flash evaporation, wherein wet sludge is placed in the drying equipment, hot air is introduced to increase the pressure in the drying equipment, and then pressure reduction treatment is carried out; the wet sludge is in a stirred state. According to the treatment method, the wet sludge is subjected to high-pressure and high-temperature treatment by hot air, and then subjected to pressure reduction treatment to reduce the boiling point of the wet sludge, at the moment, the temperature of moisture in the sludge is higher than the boiling point under the normal pressure condition, the moisture is quickly boiled and vaporized in drying equipment, and two phases are separated, so that the moisture is gasified, and the drying process of the sludge is quickly realized. However, when the drying equipment is used for processing fish meal, the fish meal is easily deteriorated by heat, and the flash drying effect is affected, so the structure of the drying equipment needs to be further improved.

Disclosure of Invention

The utility model aims to solve the technical problem that a prevent effectively that fish meal degeneration in the drying process is provided to above-mentioned prior art current situation, fish meal drying efficiency is high, effectual to the flash drying device of energy-concerving and environment-protective fish meal.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this flash distillation drying device of fish meal, including feeding portion, crushing and drying portion, whirlwind separation portion, dust removal portion and draught fan, the material transmission mouth of feeding portion is linked together with the material import of crushing and drying portion the top of crushing and drying portion is provided with the material export, the material export is linked together with the feed inlet of whirlwind separation portion, the discharge gate of whirlwind separation portion is connected with material collection device, the dust outlet of whirlwind separation portion is linked together through the inner chamber of pipeline with dust removal portion, dust removal portion is connected with the draught fan, and the motor of feeding portion, crushing and drying portion, whirlwind separation portion, draught fan and the valve of dust removal portion are connected its characterized in that through circuit and control portion respectively: the fish meal production line comprises a crushing and drying part, a fish meal production line steaming machine, a drying machine and a boiler, wherein the crushing and drying part is connected with an air blower which can send air heated by steam condensate water after heat exchange in the fish meal production line steaming machine or/and the drying machine or/and the boiler into a lower inner cavity of the crushing and drying part, a hollow jacket which divides the lower inner cavity into a crushing cavity and an air inlet cavity is arranged in the lower inner cavity, the inner cavity of the hollow jacket is communicated with a cooling liquid pipe, the air inlet cavity is communicated with an air outlet of the air blower, a communication port which is communicated with the crushing cavity and the air inlet cavity is arranged at the bottom of the hollow jacket, and the crushing cavity is communicated with a material inlet and a material outlet.

As an improvement, a conical structure is arranged at the bottom of the crushing cavity, and a driving shaft of the crushing mechanism of the crushing and drying part penetrates through the conical structure to be connected with a driving shaft cantilever in the crushing cavity.

The improved structure is characterized in that the driving shaft cantilevers are provided with a plurality of driving shaft cantilevers which are sequentially arranged up and down along the axial direction of the driving shaft, and the driving shaft cantilever positioned at the lowest part can extend into a folding rod between the conical structure and the inner wall of the hollow jacket.

In an improvement, a forced lubrication device is arranged on a driving shaft of a crushing mechanism of a crushing drying part positioned outside a lower inner cavity, the driving shaft penetrates through a lubrication cavity of the forced lubrication device, the lubrication cavity is communicated with an oil tank through an oil pump, the oil pump circularly inputs lubricating oil to the lubrication cavity for lubricating and cooling the driving shaft, and the oil tank is continuously cooled by an oil tank cooling device.

As an improvement, a grading ring which can prevent large particles and undried fish meal from passing through is arranged in an upper inner cavity of the crushing and drying part.

In a further improvement, the grading rings are arranged in the upper inner cavity of the crushing and drying part at intervals, and the aperture of the filtering holes of the grading ring above the grading rings is smaller than that of the grading rings below the grading rings.

As an improvement, the lower part of the crushing and drying part is connected with a steam heat exchanger, the steam heat exchanger is provided with a heat exchange pipe, the heat exchange pipe is communicated with a steam condensate water pipeline after heat exchange in a fish meal production line cooking machine or/and a drying machine or/and a boiler, and the inner cavity of the steam heat exchanger is communicated with an air inlet cavity and a blast port of an air blower.

The feeding part is a screw feeder, a sensor capable of detecting the content of the fish meal in the crushing cavity is arranged in the crushing cavity, the sensor is connected with the control part through a line, and the control part can adjust the rotating speed of a screw shaft of the screw feeder according to the detection value of the sensor.

As an improvement, the cyclone separation part consists of a primary cyclone separator and a secondary cyclone separator; the dust removing part is a bag-type dust remover.

In a further improvement, a silencer is arranged between the dust removing part and the induced draft fan.

Compared with the prior art, the utility model has the advantages of: the hollow jacket is arranged in the crushing cavity, plays a role in buffering, can prevent high-temperature hot air entering from the air inlet from directly contacting with the fish meal, reduces the probability of the fish meal going bad due to overheating, and can circularly introduce cooling liquid into the hollow jacket, so that the overhigh temperature in the crushing cavity is avoided, the fish meal is effectively prevented from being heated and denatured, and the drying effect of the fish meal is good; the driving shaft of the crushing mechanism can be lubricated and cooled preferably by a forced lubricating device, so that the heat conduction of the crushing mechanism is enhanced, the probability of overheating and deterioration of the fish meal is further reduced, and the fish meal is prevented from being adhered to the crushing mechanism; the circumferential air speed in the crushing cavity is high, the retention time of the fish meal is short, the fish meal is effectively prevented from sticking to the wall and deteriorating, the uniform fish meal can be dried at one time, the crushing and screening processes are omitted, and the pasty and filter cake-shaped fish meal can be treated; waste heat energy generated in the production process of the fish meal is utilized to heat air, so that heat source loss is reduced, and the fish meal production process is more energy-saving and environment-friendly; the bottom of the crushing cavity is provided with an inverted cone structure, so that the hot air circulation section is continuously enlarged from bottom to top, the bottom air velocity is high, and the upper air velocity is low, so that large particles at the lower part and small particles at the upper part can be in a good fluidization state, the inverted cone structure also reduces the length of a driving shaft cantilever, and the operation reliability is improved; the upper inner cavity of the crushing and drying part is provided with a grading ring, which mainly has the function of blocking the materials with larger particles or without drying in the crushing cavity, and can effectively ensure the requirements of product granularity and moisture; the materials are dispersed in hot air at a high speed, the drying time is short, and the method is particularly suitable for drying agglomerated and sticky materials; continuous operation, the feeding amount, the hot air temperature and the product granularity can be automatically controlled within a certain range, thereby ensuring various indexes of the dried product; the whole device is closed, and the device is operated under negative pressure, so that dust is not leaked, the production environment is protected, and the device is safe and sanitary; the equipment has compact structure and small occupied area, integrates drying, crushing and grading into a whole, is a combination of a fluidization technology, a rotation technology, a spout technology and a convection heat transfer technology, greatly simplifies the production process flow, and saves the equipment investment and the operation cost.

Drawings

Fig. 1 is a front perspective view of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the remaining parts of FIG. 1 with the control part removed;

FIG. 3 is a top view of FIG. 2;

fig. 4 is an enlarged view of a portion I in fig. 2.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 4, the flash evaporation drying device for fish meal of this embodiment, including feeding portion 1, crushing and drying portion 2, cyclone 3, dust removal portion 4 and draught fan 5, the material conveying mouth of feeding portion 1 is linked together with the material import of crushing and drying portion 2, be provided with the material export at the top of crushing and drying portion 2, the material export is linked together with cyclone 3's feed inlet, cyclone 3's discharge gate is connected with material collection device, cyclone 3's dust export is linked together through the inner chamber of pipeline with dust removal portion 4, dust removal portion 4 is connected with draught fan 5, feeding portion 1, crushing and drying portion 2, cyclone 3, the motor of draught fan 5 and the valve of dust removal portion 4 are connected with control portion 6 through the circuit respectively. The material collecting device can be a fish meal collecting bin, a fish meal collecting tank or other containers suitable for storing fish meal. The air discharged from the induced draft fan 5 enters the waste gas treatment device for further treatment, and the specific treatment process and the used waste gas treatment device belong to the known technology, so the detailed description is omitted.

The crushing and drying part 2 is connected with a blower 7 which can send air heated by steam condensate water after heat exchange in a fish meal production line cooking machine or/and a drying machine or/and a boiler into a lower inner cavity of the crushing and drying part 2, a hollow jacket 23 which divides the lower inner cavity into a crushing cavity 21 and an air inlet cavity 22 is arranged in the lower inner cavity, the inner cavity of the hollow jacket 23 is communicated with a cooling liquid pipe, the air inlet cavity 22 is communicated with a blast opening of the blower 7, a communication opening which is communicated with the crushing cavity 21 and the air inlet cavity 22 is arranged at the bottom of the hollow jacket 23, and the crushing cavity 21 is communicated with a material inlet and a material outlet. At the bottom of the crushing chamber 21 a cone-shaped structure 24 is arranged, through which cone-shaped structure 24 the drive shaft of the crushing mechanism of the crushing and drying section 2 is connected to a drive shaft cantilever 25 located in the crushing chamber 21. The driving shaft cantilever 25 has a plurality of and sets up in proper order from top to bottom along the driving shaft axial, and the drive shaft cantilever 25 that is located the bottommost is the folding rod 251 that can stretch into between toper structure 24 and the hollow jacket 23 inner wall. In the prior art, steam, heat conduction oil, electricity and fire are generally adopted to heat air, and the method utilizes waste heat energy generated in the production process of fish meal to heat air, reduces heat source loss, and is more energy-saving and environment-friendly. The temperature of the steam condensate is typically around 120 ℃.

A forced lubrication device 28 is provided on a drive shaft 27 of the pulverizing mechanism of the pulverizing and drying section 2 located outside the lower cavity, the drive shaft 27 is inserted into a lubrication chamber 281 of the forced lubrication device 28, the lubrication chamber 281 is communicated with an oil tank via an oil pump, the oil pump circularly feeds lubricating oil into the lubrication chamber 281 to lubricate and cool the drive shaft 27, and the oil tank is continuously cooled by an oil tank cooling device. The oil tank cooling device can be a cooling pipe or other cooling equipment wound outside the oil tank, and the specific structure belongs to the known technology, so the detailed description is not needed. The forced lubrication device 28 includes an upper cover, a sealing cylinder and a lower cover, an oil inlet is provided on the upper cover, an oil outlet is provided on the lower cover, an upper lubrication bearing is fixed at the joint of the upper cover and the sealing cylinder, and a lower lubrication bearing is fixed at the joint of the lower cover and the sealing cylinder.

A grading ring 26 capable of preventing large particles and undried fish meal from passing through is arranged in the upper inner cavity of the crushing and drying part 2. The classifying rings 26 are provided in plurality, the classifying rings 26 are arranged in the upper inner chamber of the pulverizing and drying section 2 at intervals, and the aperture of the filtering hole of the upper classifying ring 26 is smaller than that of the lower classifying ring 26. The grading ring 26 functions as a screen, the filtering holes distributed on the grading ring 26 can block the fish meal with large particles through the fish meal with small particles, and the aperture of the specific filtering holes can be adjusted by replacing the corresponding grading ring 26 according to actual conditions, so that detailed description is omitted.

The lower part of the crushing and drying part 2 is connected with a steam heat exchanger 8, the steam heat exchanger 8 is provided with a heat exchange pipe, the heat exchange pipe is communicated with a steam condensate water pipe after heat exchange in a fish meal production line cooking machine or/and a drying machine or/and a boiler, and the inner cavity of the steam heat exchanger 8 is communicated with an air inlet cavity 22 and a blast opening of an air blower 7. The feeding part 1 is a screw feeder, a sensor capable of detecting the content of fish meal in the crushing cavity 21 is arranged in the crushing cavity 21, the sensor is connected with the control part 6 through a line, and the control part 6 can adjust the rotating speed of a screw shaft of the screw feeder according to the detection value of the sensor.

The cyclone separation part 3 consists of a primary cyclone separator and a secondary cyclone separator; the dust removing part 4 is a bag-type dust remover. A silencer 9 is provided between the dust removing unit 4 and the induced draft fan 5. The control unit 6 can be controlled by a PLC, and the specific circuit structure of the control unit 6 is not described in detail since it belongs to the prior art. The concrete structure of the driving shaft cantilever 25 driven by the crushing mechanism to rotate, the concrete structure of the steam heat exchanger 8, the concrete structure of the air blower 7, the concrete structure of the screw feeder, the concrete structure of the primary cyclone separator and the secondary cyclone separator, the concrete structure of the dust removing part 4, the concrete structure of the induced draft fan 5 and the concrete structure of the silencer 9 all belong to the prior art, so detailed description is omitted. A temperature sensor is arranged in the hollow jacket 23 and is connected with a control part through a line, and the control part can control the air inlet speed of the air blower according to the feedback signal of the temperature sensor so as to keep the temperature of the crushing cavity heated by hot air between 50 and 90 ℃.

The working principle is as follows: the device can increase the dispersion degree of the fish meal to the maximum extent, namely increase the surface area in unit volume of wet feed and accelerate the heat transfer and mass transfer processes. Required air is purified by an air filter, and enters the crushing cavity from a bottom annular gap tangent line after being heated by a heater to generate spiral ascending airflow; wet material is continuously and quantitatively added into the dryer through a spiral feeder, the caked material is rapidly crushed by a bottom crushing mechanism so as to be rapidly dried, the dried dry product is taken out of the dryer along with hot air from an outlet pipe at the upper part of the dryer, dry product powder particles are collected into a storage bin through a cyclone separator, and the tail gas is extracted by an induced draft fan and then is subjected to dust removal and recovery treatment.

The bottom of the crushing cavity is provided with an inverted cone structure, so that the hot air circulation section is continuously enlarged from bottom to top, the bottom air velocity is high, and the upper air velocity is low, so that large particles at the lower part and small particles at the upper part can be in a good fluidization state, the inverted cone structure also reduces the length of a driving shaft cantilever, and the operation reliability is improved;

the upper inner cavity of the crushing and drying part is provided with a grading ring, which mainly has the function of blocking the materials with larger particles or without drying in the crushing cavity, and can effectively ensure the requirements of product granularity and moisture;

a jacket is arranged at a hot air inlet at the cone bottom for protection, so that the materials are prevented from being overheated and deteriorated due to contact with high-temperature air;

the materials are dispersed in hot air at a high speed, the drying time is short, and the method is particularly suitable for drying agglomerated and sticky materials;

continuous operation, the feeding amount, the hot air temperature and the product granularity can be automatically controlled within a certain range, thereby ensuring various indexes of the dried product;

the whole device is closed, and the device is operated under negative pressure, so that dust is not leaked, the production environment is protected, and the device is safe and sanitary;

the equipment has compact structure and small occupied area, integrates drying, crushing and grading into a whole, is a combination of a fluidization technology, a rotation technology, a spout technology and a convection heat transfer technology, greatly simplifies the production process flow, and saves the equipment investment and the operation cost.

Further description is given by taking a drying device with the fish meal treatment capacity of 2000kg/h as an example:

the technical parameters are as follows:

1. name of material: fish meal

2. Fish meal treatment amount: 2000kg/h

3. Initial water content: 30 percent of

4. Final moisture content: less than or equal to 10 percent

5. Air inlet temperature: 120 ℃ to

6. Heat source: steam (0.6 to 0.7Mpa)

7. And (3) drying mode: flash drying

8. A material receiving mode: two-stage cyclone and dust removal

9. Installation: indoor use

10. Power supply: 380V, 50Hz, three-phase four-wire

The drying process has the specific technological parameters:

1. hot air parameters:

air temperature:

normal temperature (15 ℃), air inlet temperature: t1 ═ 140 ℃, exhaust temperature: t 2-75 deg.C

2. Material parameters:

dry product amount: 2000kg/h, assuming specific heat of the materials: 0.4kcal/h

Water content of raw materials: 30%, water content of the product: omega 2 ═ 10%

And (3) material drying temperature: theta 2-50 deg.C

3. Calculating heat balance and air volume:

1) moisture evaporation capacity: w_{Water (W)}＝571Kg/h

2) Heat required for evaporating water: q1-350000 kcal/h

3) And the heat required by the product temperature rise: q2 ═ 28000kcal/h

4) And equipment heat loss (taking the peripheral heat loss of the drying equipment as 10%): q3 ═ 38000kcal/h

5) And the amount of air required for drying: l ═ Q1+ Q2+ Q3/(140-75)0.24=27000kg/h

Main configuration of single flash evaporation drying equipment

Hot air system

The air filter is made of non-woven fabrics, and the number of the air filters is 1 group.

The steam heat exchanger is made of carbon steel tubes and aluminum fins, and the number of the carbon steel tubes and the aluminum fins is 1.

The air feeder, quantity 1 platform, area air regulation valve, whole support.

The hot air pipeline (containing a reducer pipe) is insulated by 100mm, 1 group is arranged, and the hot air pipeline is from the outlet of the hot air furnace to the flash evaporation air inlet.

Dry charging system

Flash evaporation main machine

Base (area washing mouth), 1 group, upper portion sets up the classificator, steerable export material granularity and humidity, and rock wool keeps warm 80mm, and the equipment inner wall is thrown the light, and the outsourcing is sprayed paint and is handled.

Air inlet box, 1 group.

Mixing chamber (with charging port), 1 group.

Cone, 1 group.

Tower section (with access door), 1 group.

Grading ring, 1 group.

Air-out tower body, 1 group.

Crushing and screening system

Crushing motor, rotational speed: 960r/min, 1 stage. The motor is a large and medium motor, oil circulation cooling is adopted in the transmission of the main engine, and water cooling is adopted in the oil tank.

Main shaft, 1 group.

Bearing and bearing frame, 1 group.

Crushing knife, stainless steel/20 mm, 1 group.

Belt pulley, assembly, 2.

Spiral feeder, 1, Variable Frequency Speed Governing (VFSG) 4KW, charge tube stainless steel preparation, flight stainless steel, hopper stainless steel.

The support and the platform are made of carbon steel and are coated with anti-rust paint.

Receive material and dust pelletizing system

2 primary cyclone separators, 2 gas distribution hammers, and a support made of carbon steel plates, and is coated with anti-rust paint, the inner wall of the equipment is polished, and the welding seams on the outer wall are pickled and passivated.

2 secondary cyclone separators, 4 gas distribution hammers, a support carbon steel plate, antirust paint coating, equipment inner wall polishing, outer wall welding line pickling and passivation.

And (4) collecting materials, shutting down a fan, and stopping the fan at 1.1kw by 2 machines.

Dust remover, 1 table, 4 Kw.

Drying the connecting pipeline, namely 1 group of straight pipes, polishing the inner wall of the pipeline, pickling and passivating the welding line of the outer wall, and conveying the connecting pipeline from a host to a bag-type dust collector; and is matched with a bent pipe and a reducer pipe.

Draught fans, 1, with air adjusting valve, integral support.

The tail gas pipeline, straight pipe, 1 group, pipeline spray painting treatment, from dust remover to exhaust pipe; and is matched with a bent pipe and a reducer pipe.

Main fittings

1. Thermal resistance, 1 group.

2. Gasket, 1 group.

3. Screw, nut, 1 group.

4. The access door components are matched, 1 group.

Control system

1. The control cabinet is matched with 1 machine, and the spraying plastics are corrosion resistant.

2. 1 set of matched electrical elements.

3. Frequency converter, 4kw, 1 stage.

4. Soft starter, 75kw, 1 station.

5. The control system comprises: controlling and displaying the temperature of the inlet air; displaying the outlet air temperature; displaying the host machine under negative pressure; frequency conversion speed regulation of a feeder; displaying by a system operation indicator lamp; centralized control of all motors.

Claims (10)

1. The utility model provides a flash drying device of fish meal, includes feeding portion (1), crushing and drying portion (2), cyclone (3), dust removal portion (4) and draught fan (5), the material conveying mouth of feeding portion (1) is linked together with the material import of crushing and drying portion (2) the top of crushing and drying portion (2) is provided with the material export, the material export is linked together with the feed inlet of cyclone (3), the discharge gate of cyclone (3) is connected with material collection device, the dust outlet of cyclone (3) is linked together through the inner chamber of pipeline with dust removal portion (4), dust removal portion (4) are connected with draught fan (5), and feeding portion (1), crushing and drying portion (2), cyclone (3), the motor of draught fan (5) and the valve of dust removal portion (4) are connected with control portion (6) through the circuit respectively, the method is characterized in that: the fish meal production line comprises a crushing and drying part (2), a fan (7) and a hollow jacket (23), wherein the fan (7) can convey air heated by steam condensate water subjected to heat exchange in a fish meal production line cooking machine or/and a drying machine or/and a boiler into a lower inner cavity of the crushing and drying part (2), the lower inner cavity is internally provided with the hollow jacket (23) which divides the lower inner cavity into a crushing cavity (21) and an air inlet cavity (22), the inner cavity of the hollow jacket (23) is communicated with a cooling liquid pipe, the air inlet cavity (22) is communicated with an air outlet of the fan (7), the bottom of the hollow jacket (23) is provided with a communication port which is communicated with the crushing cavity (21) and the air inlet cavity (22), and the crushing cavity (21) is communicated with a material inlet and a material outlet.

2. A flash drying apparatus according to claim 1, wherein: a conical structure (24) is arranged at the bottom of the crushing cavity (21), and a driving shaft of a crushing mechanism of the crushing and drying part (2) penetrates through the conical structure (24) to be connected with a driving shaft cantilever (25) positioned in the crushing cavity (21).

3. A flash drying apparatus according to claim 2, wherein: the driving shaft cantilevers (25) are provided with a plurality of driving shaft cantilevers which are sequentially arranged up and down along the axial direction of the driving shaft, and the driving shaft cantilever (25) positioned at the lowest part is a folding rod (251) which can extend into the space between the conical structure (24) and the inner wall of the hollow jacket (23).

4. A flash drying apparatus according to any one of claims 1 to 3, characterized in that: a forced lubrication device (28) is arranged on a driving shaft (27) of a crushing mechanism of a crushing and drying part (2) positioned outside a lower inner cavity, the driving shaft (27) penetrates through a lubricating cavity (281) of the forced lubrication device (28), the lubricating cavity (281) is communicated with an oil tank through an oil pump, the oil pump circularly inputs lubricating oil to the lubricating cavity (281) to lubricate and cool the driving shaft (27), and the oil tank is continuously cooled by an oil tank cooling device.

5. A flash drying apparatus according to any one of claims 1 to 3, characterized in that: a grading ring (26) which can prevent large particles and undried fish meal from passing through is arranged in the upper inner cavity of the crushing and drying part (2).

6. A flash drying apparatus according to claim 5, wherein: the grading rings (26) are arranged in the upper inner cavity of the crushing and drying part (2) at intervals, and the aperture of the filtering holes of the grading ring (26) positioned above is smaller than that of the grading ring (26) positioned below.

7. A flash drying apparatus according to any one of claims 1 to 3, characterized in that: the lower part of the crushing and drying part (2) is connected with a steam heat exchanger (8), a heat exchange pipe is arranged on the steam heat exchanger (8), the heat exchange pipe is communicated with a steam condensate water pipeline after heat exchange in a fish meal production line cooking machine or/and a drying machine or/and a boiler, and the inner cavity of the steam heat exchanger (8) is communicated with an air inlet cavity (22) and an air blast opening of an air blower (7).

8. A flash drying apparatus according to any one of claims 1 to 3, characterized in that: the feeding part (1) is a screw feeder, a sensor capable of detecting the content of fish meal in the crushing cavity (21) is arranged in the crushing cavity (21), the sensor is connected with the control part (6) through a line, and the control part (6) can adjust the rotating speed of a screw shaft of the screw feeder according to the detection value of the sensor.

9. A flash drying apparatus according to any one of claims 1 to 3, characterized in that: the cyclone separation part (3) consists of a primary cyclone separator and a secondary cyclone separator; the dust removing part (4) is a bag-type dust remover.

10. A flash drying apparatus according to any one of claims 1 to 3, characterized in that: a silencer (9) is arranged between the dust removing part (4) and the induced draft fan (5).

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