Acesulfame potassium drying device

Abstract

The utility model belongs to the technical field of drying equipment, and particularly relates to an acesulfame potassium drying device which comprises a stock bin, a vacuum drying cylinder, a vacuum pump, a condenser, a storage tank, a draught fan, a first condensate tank, a second condensate tank, a first water pump and a second water pump, the first condensate tank is connected with the first water pump in series, and the second condensate tank is connected with the second water pump in series. The condensate tank I is connected with the condensate tank II; the stock bin is connected with the vacuum drying cylinder, and the vacuum drying cylinder is communicated with the second water pump and the second condensate tank to form a closed circulating pipeline. The vacuum drying cylinder is externally connected with a vacuum pump, the vacuum pump is connected with a condensate tank I, the condensate tank I is connected to a condenser, and the condenser is internally connected with the vacuum drying cylinder; a storage tank is arranged at the bottom of the vacuum drying cylinder; and the storage tank is connected with a fan. According to the acesulfame potassium drying device, hot steam generated when acesulfame potassium is dried in the vacuum drying cylinder can be recycled, so that the purpose of saving cost is achieved, and the quality stability and consistency of products can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to drying equipment technical field, concretely relates to acesulfame-k drying device. BACKGROUND

[0002] At present, in acesulfame-k production process, the wet product sent from centrifugal section is high-temperature dried by using steam vibration fluidized bed in drying section, this mode can effectively dry acesulfame-k, but the wet product is thrown along the horizontal plane due to vibration in the vibration fluidized bed and continuously moves forward, this process can cause particle breakage and affect product quality.Secondly, the energy consumption of steam fluidized bed drying mode is large, which undoubtedly increases production cost.In addition, if the temperature, humidity and flow rate of hot air are not controlled properly, it can cause uneven drying and affect the stability of product quality. SUMMARY

[0003] The utility model wants to solve the problem that: at present, in acesulfame-k production process, acesulfame-k drying section, steam vibration fluidized bed causes acesulfame-k particle breakage and affects product quality.Secondly, the energy consumption of steam fluidized bed drying mode is large, and the production cost is high.

[0004] In order to solve the above technical problem, the utility model provides the following technical scheme:

[0005] A kind of acesulfame-k drying device, including bunker, vacuum drying cylinder, condensate tank, water pump, vacuum pump and at least one condenser, storage tank and fan, condensate tank includes condensate tank one, condensate tank two, water pump includes water pump one, water pump two, condensate tank one is connected with water pump one, condensate tank two is connected with water pump two;Condensate tank one is connected with water pump one after being connected with condensate tank two;

[0006] The bunker is connected with the vacuum drying cylinder, the vacuum drying cylinder is communicated with the water pump two and the condensate tank two and forms a closed circulation pipeline, and the water pump two and the condensate tank two are used to circulate and supply hot water of set temperature into the hot water jacket to dry material;

[0007] The vacuum pump is connected with the vacuum drying cylinder and is used to extract vacuum;The vacuum pump is connected with condensate tank one, and the condensate tank one is connected to the condenser, and the condenser is connected with the vacuum drying cylinder, and is used to condense hot steam extracted during vacuum extraction and return to the condensate tank one for recycling;

[0008] The vacuum drying cylinder bottom is provided with a storage tank for receiving dried material;The storage tank is connected with a fan for blowing and cooling material.

[0009] Further, the storage tank is provided with upper and lower screens, the bottom of the lower screen is provided with a air supply port connected with a fan, and the top of the upper screen is provided with an air outlet connected with a dust collector.

[0010] Further, the screen is a 100-mesh screen.

[0011] Further, the vacuum drying cylinder comprises a shell, a hot water jacket sleeved outside the shell, a hot water inlet arranged at the bottom of the hot water jacket, a hot water outlet arranged at the top of the hot water jacket, a water pump II connected with the hot water inlet, and a condensate tank II connected with the hot water outlet.

[0012] Further, a thermometer is arranged in the hot water jacket.

[0013] Further, the vacuum drying cylinder further comprises a stirring device, the stirring device comprising a stirring motor, a stirring rod and stirring blades, the stirring motor being arranged at the top of the vacuum drying cylinder, the bottom of the stirring motor being connected with the top of the stirring rod, the stirring rod extending into the interior of the vacuum drying cylinder, and the stirring blades being arranged on the stirring rod.

[0014] Further, the stirring blades are polygonal blades.

[0015] Further, the stirring blades comprise first, second and third stirring blades, the first stirring blade being perpendicular to the stirring rod, one end of the second stirring blade being connected with the stirring rod, the other end of the second stirring blade being connected with one end of the third stirring blade, the second stirring blade being at an angle of 45 degrees with the stirring rod, and the third stirring blade being connected between the first and second stirring blades.

[0016] Further, the third stirring blade is shorter than the first and second stirring blades.

[0017] Further, the first, second and third stirring blades are uniformly distributed in the circumferential direction of the stirring rod as the central axis.

[0018] Further, the storage tank is provided with a fan.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] 1. The utility model discloses a vacuum drying cylinder is adopted, and the drying is carried out in the vacuum environment, and the pressure is lower under the vacuum environment, and the external pressure that the acesulfame potassium granule bears is relatively small, which reduces the possibility of deformation or breakage of the granule due to external pressure, vacuum drying is a relatively slow process, and moisture gradually diffuses from the inside of the granule to the surface and evaporates, and this slow drying method enables the stress in the granule to be released relatively uniformly, and local stress concentration is not easy to form, thereby reducing the risk of granule breakage, under the vacuum condition, the evaporation temperature of moisture is relatively low, and the damage of high temperature to the structure of the granule is reduced. The quality stability and consistency of acesulfame can be effectively improved, and the technical problems of granule breakage and low product quality caused by high-temperature drying of acesulfame in a steam vibration fluidized bed are solved, and moreover, through the vacuum drying operation, the acesulfame product reduces problems such as mildew and oxidation, and the shelf life of the acesulfame product is prolonged.

[0021] 2. Acesulfame in the vacuum drying cylinder of the utility model will produce a large amount of steam in the drying process, the steam enters the condenser through the pipeline, forms condensate, the condensate circulates to the condensate tank one, and then flows back to the vacuum drying cylinder, so that the hot steam generated during the drying of acesulfame in the vacuum drying cylinder is recycled, thereby achieving the goal of saving cost and reducing the moisture content of acesulfame product.

[0022] 3. The heat steam recycling of the utility model can reduce the existence of oxygen and avoid the occurrence of oxidation reaction, thereby maintaining the stability and color of the product, in the process of vacuum pumping, various gas molecules including oxygen molecules are pumped out together, thereby rapidly reducing the oxygen content in the space. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure schematic view of the acesulfame drying device of the embodiment of the utility model.

[0024] Reference signs:

[0025] 1 is a stock bin, 2 is a vacuum drying cylinder, 21 is a shell, 22 is a hot water jacket, 23 is a stirring device, 231 is a stirring motor, 232 is a stirring rod, 233 is a first stirring blade, 234 is a second stirring blade, 235 is a third stirring blade,

[0026] 3 is a feeding pneumatic valve, 4 is a thermometer, 51 is a condensate tank one, 52 is a condensate tank two, 61 is a water pump one, 62 is a water pump two, 7 is a condenser, 8 is a vacuum pump, 9 is a screen, 10 is a fan, 11 is a feeding pneumatic valve, 12 is a storage tank, 13 is a hot water inlet, 14 is a hot water outlet, 15 is a dust remover, and 16 is a pressure gauge. DETAILED DESCRIPTION

[0027] The technical scheme of the utility model will be clearly described below in combination with the drawings. Obviously, the described embodiments are not all the embodiments of the utility model, and all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the utility model.

[0028] It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "rear", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] The utility model provides a kind of acesulfame-k drying device, including bunker 1, for containing material to be dried in bunker 1, in the embodiment, material is acesulfame-k, vacuum drying cylinder 2 is connected with the lower end of bunker 1 by pipeline, and pneumatic valve 3 is arranged between bunker 1 and vacuum drying cylinder 2.The material in bunker 1 enters vacuum drying cylinder 2 by pipeline when pneumatic valve 3 is opened.3-5 tons of acesulfame-k needing drying can be input into vacuum drying cylinder 2 each time.

[0030] Vacuum drying cylinder 2 is of jacketed structure, and vacuum drying cylinder 2 includes shell 21, hot water jacket 22 externally sleeved on shell 21, and stirring device 23 arranged on shell 21.

[0031] Hot water is circulated into hot water jacket 22 at a set temperature to dry the material.Hot water inlet 13 is arranged at the bottom of hot water jacket 22, and hot water outlet 14 is arranged at the top of hot water jacket 22, so that the hot water in hot water jacket 22 and the hot water supplied outside hot water jacket 22 form a circulation through hot water inlet 13 and hot water outlet 14.

[0032] In some embodiments, the temperature of the hot water entering hot water jacket 22 is between 60℃-90℃, and the acesulfame-k needing drying is heated to a temperature between 40℃-60℃ to achieve the purpose of drying the acesulfame-k.

[0033] A thermometer 4 is arranged in hot water jacket 22 to measure the temperature of the hot water in hot water jacket 22.

[0034] Stirring device 23 includes stirring motor 231, stirring rod 232 and stirring blade.The stirring motor 231 is arranged at the top of vacuum drying cylinder 2, the bottom of stirring motor 231 is connected with the top of stirring rod 232, stirring rod 232 extends into the inside of vacuum drying cylinder 2, and stirring blade is arranged on stirring rod 232.The stirring motor 231 is used to drive stirring rod 232 to rotate, and the stirring blade is used to stir the material in vacuum drying cylinder 2.

[0035] The stirring rod 232 is provided with at least one set of stirring blades.

[0036] The stirring blades are polygonal blades, and the stirring blades include a first stirring blade 233, a second stirring blade 234 and a third stirring blade 235. The first stirring blade 233 is symmetrically arranged on both sides of the stirring rod 232 perpendicularly. One end of the second stirring blade 234 is connected with the stirring rod 232 (for the last stirring blade on the stirring rod 232, one end of the second stirring blade 234 is connected with the bottom end point of the stirring rod 232), and the other end is connected with one end of the third stirring blade 235. The second stirring blade 234 is at an angle of 45 degrees with the stirring rod 232. The third stirring blade 235 is connected with the first stirring blade 233 and the second stirring blade 234.

[0037] The third stirring blade 235 is shorter than the first stirring blade 233 and the second stirring blade 234 respectively.

[0038] The first stirring blade 233, the second stirring blade 234 and the third stirring blade 235 are uniformly distributed in the circumferential direction of the stirring rod 232 as the central axis.

[0039] Compared with common stirring blades such as an electric fan, the stirring blades of the present application can improve the stirring area, so that the stirring device of the present application can more uniformly stir the acesulfame-K in the vacuum drying cylinder 2 during the drying process, and the acesulfame-K is better dried.

[0040] The top of the shell 21 of the vacuum drying cylinder 2 is connected with at least one condenser 7 through a pipeline, and the condenser 7 is connected with a condensate tank 51. During the drying process of the material, the steam generated in the shell 21 of the vacuum drying cylinder 2 enters the condenser 7 and is condensed, and the condensate from the condenser 7 is received by the condensate tank 51. The condensate is finally circulated back to the hot water jacket 22 of the vacuum drying cylinder 2, so as to achieve the goal of recycling the steam and saving costs.

[0041] In one embodiment, two condensers 7 are connected in series to form two-stage condensers. After two-stage condensation of the steam of the vacuum drying cylinder 2, the condensate is circulated back to the condensate tank 51 for recycling.

[0042] The condensate tank 1 51 is connected with a water pump 1 61, the water pump 1 61 is connected with a condensate tank 2 52 and a water pump 2 62 in sequence, the water pump 2 62 is connected with a hot water inlet 1 3 arranged at the bottom of the hot water jacket 22, and the condensate tank 2 52 is connected with a hot water outlet 1 4 arranged at the top of the hot water jacket 22. The hot water collected by the condensate tank 1 51 is pumped to the condensate tank 2 52, and then is pumped into the hot water jacket 22; the hot water flowing out of the hot water jacket 22 is returned to the condensate tank 2 52, so as to form the circulation of the hot water in the hot water jacket 22, and the steam generated by drying is recycled. The condensate tank 1 51 and the condensate tank 2 52 are provided with heating devices, such as heating resistors, for heating the returned water to a set temperature. In the embodiment, the temperature range is increased by 5 degrees in consideration of the heat loss of the pipeline, and the condensate tank 1 51 and the condensate tank 2 52 are heated to a set temperature (such as 65-95℃).

[0043] In the embodiment, the hot steam is subjected to two-stage condensation, and then is pumped into the two-stage condensate tank and the hot water jacket. At this time, there is no steam in the condensate, the liquid sent into the hot water jacket 22 is free of steam, and the heat transfer rate is improved.

[0044] The condensate tank 1 51 is connected with a vacuum pump 8, the vacuum pump 8 is used to pump the vacuum drying cylinder 2 to a vacuum state, so that the pressure in the vacuum drying cylinder 2 is reduced to between -0.06 Mpa and -0.08 Mpa.

[0045] The vacuum drying cylinder 2 is provided with a pressure gauge 1 6 for detecting the pressure in the vacuum drying cylinder 2 in real time.

[0046] The vacuum pump 8 can also pump the condensate tank 1 51 to a vacuum state, so as to further avoid the existence of gas in the condensate. The condensate pumped to a vacuum state is pumped to the condensate tank 2 52, and then is circulated to the hot water jacket 22, so as to avoid the existence of gas in the hot water jacket 22, and further improve the heat transfer rate.

[0047] The vacuum drying cylinder 2 is connected with a storage tank 1 2 through a pipeline, the storage tank 1 2 is used to receive the dried material. The pipeline between the vacuum drying cylinder 2 and the storage tank 1 2 is provided with a feeding pneumatic valve 1 1. After the acesulfame K to be dried is dried, the feeding pneumatic valve 1 1 is opened, and the acesulfame K is released from the vacuum drying cylinder 2 into the storage tank 1 2.

[0048] The storage tank 1 2 is connected with a fan 1 0, which is used to blow air to the material in the storage tank 1 2. Because the acesulfame K is still hot after drying, a small amount of hot steam is generated, which will affect the quality of the final product. The fan 1 0 blows air to the acesulfame K in the storage tank 1 2, so that the acesulfame K in the storage tank 1 2 is rapidly cooled, the generation of hot steam is reduced, and the product quality is improved.

[0049] The upper and lower layers of screen meshes 9 are arranged in the storage tank 12, the bottom of the lower layer of screen meshes 9 is provided with a air supply port connected with the fan 10, and the top of the upper layer of screen meshes 9 is provided with an air outlet connected with the dust collector 15.

[0050] In one specific embodiment, the screen mesh 9 is a 100-mesh screen mesh. The "mesh" of the screen mesh refers to the number of screen holes per square inch, and 100 mesh indicates that there are 100 screen holes per square inch on the screen mesh.

[0051] The dust collector 15 can send out the material smaller than 100 mesh from the storage tank 12, the storage tank 12 can not only be used to store the material of Acesulfame-K, but also remove the material of non-intended purpose through the joint arrangement of the fan 10, and prevent the material from being agglomerated.

[0052] Through the Acesulfame-K drying device, when 3-5 tons of Acesulfame-K is dried, 3 hours are needed without the blowing time of the fan 10, and 4-5 hours are needed with the blowing time of the fan 10.

[0053] The specific drying process of the embodiment of the utility model is as follows:

[0054] (1) feeding: opening the feeding pneumatic valve 3 and closing the discharging pneumatic valve 11, the material in the storage bin enters the vacuum drying cylinder 2;

[0055] (2) vacuumizing: closing the feeding pneumatic valve 3 and starting the vacuum pump 8 to vacuumize the vacuum drying cylinder 2, and detecting, controlling and maintaining the vacuum degree to reach the preset drying condition range: negative 0.06 Mpa-negative 0.08 Mpa through the pressure gauge 16;

[0056] (3) heating: while vacuumizing, hot water flows into the hot water jacket 22 of the vacuum drying cylinder 2 from the hot water inlet 13 to dry the material in the vacuum drying cylinder 2, and finally flows out to the condensate tank two 52 from the hot water outlet 14, and after being heated to the set temperature (such as 65℃-95℃) in the condensate tank two 52, the hot water flows into the hot water jacket 22 from the hot water inlet 13 again for recycling; during the recycling and heating process, the temperature in the hot water jacket 22 is detected in real time through the thermometer 4 to control the heating and maintain the temperature to reach the preset drying condition range, and the process continues until the drying is completed;

[0057] (4) stirring: while heating and drying, the stirring motor 231 is started to drive the stirring rod 232 to rotate and synchronously drive the lifting driving device to lift, and the lifting driving device drives the stirring rod to lift; the stirring rod is lifted and stirred simultaneously, so that the material in the vacuum drying cylinder 2 is evenly heated, the drying speed is accelerated, and the drying time is shortened;

[0058] (5) drying: after the material in the vacuum drying cylinder 2 is heated to the drying temperature, the heat steam generated by the evaporation of water is pumped into the condenser 7 by the vacuum pump 8 to exchange heat and condense, on the one hand, the preset vacuum degree is maintained by the vacuum pumping operation, on the other hand, the extracted heat steam is condensed by the condenser 7 and flows back to the condensate tank 1 51 for recycling, the condensate tank 1 51 is used as the supplement of the condensate tank 2 52 to realize the recycling of the steam; during the whole drying process, the vacuum pumping, heating, stirring and drying are carried out at the same time until all the materials are dried completely;

[0059] (6) unloading vacuum: after the drying is completed, the vacuum pumping and heating are stopped; the unloading vacuum operation is carried out through the vent valve (not shown in the figure) arranged on the vacuum drying cylinder 2 until the pressure in the vacuum drying cylinder 2 reaches the normal pressure;

[0060] (7) discharging: after the pressure in the vacuum drying cylinder 2 reaches the normal pressure, the discharging pneumatic valve 11 is opened, the dried materials are discharged to the storage tank 12 through the discharging pneumatic valve 11, at the same time, the fan 10 in the storage tank 12 is opened to blow and cool the materials in the storage tank 12;

[0061] (8) end: after all the dried materials are discharged, the stirring motor 231 is stopped to stop the stirring, and the discharging pneumatic valve 11 is closed.

[0062] The above technical features constitute the best embodiment of the present application, which has strong adaptability and the best implementation effect, and unnecessary technical features can be added or reduced according to actual needs to meet the needs of different situations.

[0063] Finally, it should be noted that the above content is only used to explain the technical scheme of the present application, and is not a limitation on the protection scope of the present application, and the simple modification or equivalent replacement of the technical scheme of the present application by the ordinary skilled in the art does not deviate from the essence and scope of the technical scheme of the present application.

Claims

1. An acesulfame-k drying apparatus comprising a hopper, a vacuum drying cylinder, a condensate tank, a water pump, a vacuum pump and at least one condenser; characterized in that, The condensate tank comprises a condensate tank one and a condensate tank two, and the water pump comprises a water pump one and a water pump two; the condensate tank one is connected with the water pump one, and the condensate tank two is connected with the water pump two; the condensate tank one is connected with the condensate tank two after being connected with the water pump one; The material bin is connected with a vacuum drying cylinder, the vacuum drying cylinder is communicated with the water pump two and the condensate tank two and forms a closed circulation pipeline, the water pump two and the condensate tank two are used for circulating and supplying hot water at a set temperature into a hot water jacket of the vacuum drying cylinder to dry the material; The vacuum drying cylinder is connected with a vacuum pump for vacuumizing, the vacuum pump is connected with the condensate tank one, the condensate tank one is connected with a condenser, the condenser is connected with the vacuum drying cylinder, and is used for condensing hot steam extracted during vacuumizing and then returning to the condensate tank one for recycling; The vacuum drying cylinder is provided with a storage tank at the bottom for receiving the dried material, and the storage tank is connected with a fan for blowing air to cool the material.

2. The acesulfame-k drying apparatus according to claim 1, characterized by The storage tank is provided with upper and lower screens, the lower screen is provided with an air supply port connected with the fan, and the upper screen is provided with an air outlet connected with a dust collector.

3. The acesulfame-k drying apparatus according to claim 2, characterized by The screen is a 100-mesh screen.

4. The acesulfame-k drying apparatus according to claim 1, wherein The vacuum drying cylinder comprises a shell and a hot water jacket arranged outside the shell, the hot water jacket is provided with a hot water inlet at the bottom and a hot water outlet at the top, the water pump two is connected with the hot water inlet, and the condensate tank two is connected with the hot water outlet.

5. The acesulfame-k drying apparatus according to claim 4, wherein The hot water jacket is provided with a thermometer.

6. The acesulfame-k drying apparatus according to claim 1, wherein The vacuum drying cylinder further comprises a stirring device, the stirring device comprises a stirring motor, a stirring rod and stirring blades, the stirring motor is arranged at the top of the vacuum drying cylinder, the bottom of the stirring motor is connected with the top of the stirring rod, the stirring rod extends into the interior of the vacuum drying cylinder, and the stirring blades are arranged on the stirring rod.

7. The acesulfame-k drying apparatus according to claim 6, characterized by The stirring blades are polygonal blades.

8. The acesulfame-k drying apparatus according to claim 7, characterized by The stirring blades comprise first, second and third stirring blades, the first stirring blade is perpendicular to the stirring rod, one end of the second stirring blade is connected with the stirring rod, the other end of the second stirring blade is connected with one end of the third stirring blade, the second stirring blade forms a 45-degree angle with the stirring rod, and the third stirring blade is connected between the first and second stirring blades.

9. The acesulfame-k drying apparatus according to claim 8, characterized in that The length of the third stirring blade is shorter than those of the first and second stirring blades.

10. The acesulfame-k drying apparatus according to claim 8, wherein The first, second and third stirring blades are uniformly distributed in the circumferential direction of the stirring rod as the central axis.

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