Self-cleaning vacuum baking bin

Abstract

The top of one end of a bin body is provided with a baking feed port, an inner cavity of the bin body is provided with a plurality of baking layers, two ends of each baking layer are respectively provided with a head shaft and a tail shaft, the head shaft and the tail shaft on the same layer are connected through a chain net, and a chain net hot air chamber is arranged between the upper layer chain net and the lower layer chain net; air channels are arranged on the two sides of each baking layer respectively, a steam heater is arranged at an air outlet of a circulating fan in the middle of each air channel, a steam jet cleaning device is arranged on the side, facing incoming air, of each steam heater, and each steam jet cleaning device is provided with a plurality of heater jet cleaning pipes which extend in the vertical direction and are parallel to one another. The side, facing the steam heater, of each heater jet cleaning pipe is provided with a steam jet opening extending in the vertical direction. According to the baking bin, fat and other impurities bonded on the steam heater can be automatically removed on line, the energy utilization efficiency and the baking production efficiency are improved, cross contamination or doping of materials is avoided, and long-period stable production is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of self-cleaning vacuum baking bins, for the baking of grain, pet food, feed and other materials, belong to baking equipment technical field. BACKGROUND

[0002] Pet food or food and other granular materials need to be baked during processing, usually heated in a tunnel oven or oven, usually such equipment uses chain net or steel belt to carry materials. For production lines with natural gas resources, high-temperature hot air generated by natural gas combustion is usually used to directly heat materials. High-temperature high-speed hot air passes through the surface of materials, causing water in materials to evaporate. The following problems exist in use:

[0003] 1. High-temperature high-speed hot air blowing through the surface of materials easily causes materials to lose water too quickly, and the surface of materials is prone to form a "armor", which is not conducive to the penetration of internal moisture, and too low moisture is also not conducive to the gelatinization of starch;

[0004] 2. Products with high fat and high protein will seep oil under high-temperature hot air, and the seeped oil will adhere to the chain net or steel belt. When hot air penetrates the chain net, the adhered dirt is easily blown into the product, causing contamination. The dirt adhered to the steel belt is also easily absorbed by high-moisture products and falls off, affecting the quality of products;

[0005] 3. For production lines without natural gas resources, hot air is usually indirectly heated by steam heaters. Steam heaters usually include multiple heating pipes with densely arranged fins. Circulating hot air is prone to form thick oil dirt on the heat exchanger, reducing heat exchange efficiency, increasing energy consumption, and reducing product quality;

[0006] 4. Too low temperature of materials easily causes spoilage, breeds harmful microorganisms, and affects the safety of materials;

[0007] 5. The net plate or tray supporting materials needs to be stopped for production and cleaned by soaking method after a short period of operation. The finned heating pipes of steam heaters are even more difficult to clean. The cleaning process is time-consuming and labor-intensive, with poor effect, and seriously affects production and the stability of production line. SUMMARY

[0008] The utility model aims to overcome the problems in the prior art, provide a self-cleaning vacuum baking bin, which can automatically remove fat and other impurities adhering to the steam heater during production, improve energy utilization efficiency and baking production efficiency, and can remove fat and other impurities adhering to the chain net and bottom plate online, avoid cross contamination or adulteration of materials, and ensure long-period stable production.

[0009] In order to solve the above technical problems, the utility model discloses a kind of self-cleaning vacuum baking bins, including bin, the top of one end of bin is equipped with baking feed inlet, the inner chamber of bin is equipped with multiple baking layers, the both ends of each baking layer are equipped with head shaft and tail shaft respectively, the head shaft and tail shaft of same layer are connected by chain net transmission between, upper chain net and lower chain net are the chain net hot air chamber of this layer between;Tail end of top baking layer is located below the baking feed inlet, tail shaft of next layer is located below head shaft of last layer, head shaft of next layer is located below tail shaft of last layer;Two sides of each baking layer are respectively equipped with air duct, the middle part of each air duct is respectively equipped with circulating fan, the air outlet of each circulating fan is respectively equipped with steam heater, and the side of each steam heater facing incoming wind is respectively equipped with steam injection cleaning device, each steam injection cleaning device is respectively equipped with multiple heater injection cleaning pipes extending along vertical direction and mutually parallel, the side of each heater injection cleaning pipe facing steam heater is respectively equipped with steam injection port extending along vertical direction.

[0010] As the improvement of the utility model, the chain net injection cleaning pipe extending along width direction is arranged in the chain net hot air chamber of each baking layer, and the bottom of the chain net injection cleaning pipe is equipped with strip-slit-shaped injection port facing the lower chain net.

[0011] As the further improvement of the utility model, the material above each baking layer is respectively equipped with steam injection heating pipe extending along width direction, and the bottom of the steam injection heating pipe is equipped with strip-slit-shaped injection port facing the material.

[0012] As the further improvement of the utility model, the steam injection heating pipe is located above the chain net injection cleaning pipe.

[0013] As the further improvement of the utility model, the bottom plate of each baking layer is respectively equipped with wet dirt collecting hopper, and each wet dirt collecting hopper is located below or downstream of steam injection cleaning point.

[0014] As the further improvement of the utility model, each wet dirt collecting hopper is equipped with circular bottom and respectively equipped with cleaning auger, the tail end bottom of the wet dirt collecting hopper is connected with outwardly extending blowdown pipe, the shaft head of the cleaning auger extends from one end of the wet dirt collecting hopper and is connected with the output end of cleaning auger reducer, the input end of cleaning auger reducer is connected with the rotor shaft of cleaning auger motor; the shaft tail of the cleaning auger extends along the axis of the blowdown pipe and is supported at the tail of the blowdown pipe, the tail end bottom outlet of the blowdown pipe is connected with hot gas flow cooling cavity, the bottom of the hot gas flow cooling cavity is connected with blowdown port, and the sidewall of the blowdown port is connected with upwardly extending negative pressure air outlet.

[0015] As the further improvement of the utility model, the bottom plate of each baking layer is further equipped with dry dirt collecting hopper, the dry dirt collecting hopper of odd baking layer is located below the tail of bottom plate, and the dry dirt collecting hopper of even baking layer is located upstream of steam injection cleaning point.

[0016] As a further improvement of the utility model, the steam injection heating pipe is located at the tail section and / or the middle section of each baking layer, and the chain net injection cleaning pipe is located at the middle section of each baking layer.

[0017] Compared with the prior art, the utility model has the following beneficial effects: 1. The upper chain net of each baking layer carries the material to the head shaft direction, the hot air in the one side air duct is heated by the steam heater, enters the chain net hot air chamber between the upper and lower chain nets, then the hot air blows upwards through the material layer to heat the material, the heated hot air enters the other side air duct, is accelerated by the circulating fan of the other side, is heated again by the steam heater of the other side, reenters the chain net hot air chamber, and is circulated to heat the material layer again, during the hot air circulation, the superheated steam sprayed from each steam injection port of the steam injection cleaning device sprays the fin heating pipe of the steam heater to soften and blow off the sticky fat, this process does not affect the operation of the equipment, and the cleaned steam heater can greatly improve the energy utilization efficiency.

[0018] 2. The lower chain net returns to the tail shaft empty, during this process, the superheated steam sprayed from each slit-shaped injection port of the chain net injection cleaning pipe softens and blows off the fat sticking to the lower chain net and the bottom plate, the cleaned chain net carries new material to the upper layer to avoid cross contamination, the blown off dirt and the condensed water formed by the steam are collected in the wet dirt collecting hopper, and the dry dirt before the cleaning point is collected in the dry dirt collecting hopper to reduce the wet dirt discharge amount. Automatic online cleaning is realized, the automation degree is improved, and the manual intensity is reduced.

[0019] 3. The wet dirt containing water in the wet dirt collecting hopper is transported to the tail end by the cleaning auger, enters the hot air flow cooling cavity through the dirt discharge pipe, is indirectly cooled in the hot air flow cooling cavity, and the softened dirt is recondensed and discharged from the dirt discharge port at the lower end, during this process, the negative pressure exhaust port ensures that the box section where the cleaning chain net is located is in a micro negative pressure state, hot air flow or steam flow is prevented from straying and condensation from occurring at other positions, and the quality of the material is affected.

[0020] 4. The steam injection heating pipe can also be used for directly heating and sterilizing the material, superheated steam is directly used for baking operation, energy conversion is avoided, and the energy efficiency is improved; the material is quickly heated under the condition of locking water, the gelatinization rate of starch is improved, harmful microorganisms are effectively inactivated, pet food or food safety is ensured, and the flavor and taste of baked pet food or baked food are improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be further explained in detail in combination with the drawings and specific embodiments, the drawings are only provided for reference and illustration, and are not used to limit the utility model.

[0022] Figure 1The utility model discloses a self-cleaning vacuum baking bin's front view;

[0023] Figure 2 For Figure 1 The plan view of the utility model discloses a self-cleaning vacuum baking bin's front view;

[0024] Figure 3 For Figure 2 The sectional view along A-A of the utility model discloses a self-cleaning vacuum baking bin's front view;

[0025] Figure 4 For Figure 3 The partial enlarged view of the utility model discloses a self-cleaning vacuum baking bin's front view;

[0026] Figure 5 The utility model discloses a self-cleaning vacuum baking bin's front view;

[0027] Figure 6 The utility model discloses a self-cleaning vacuum baking bin's front view;

[0028] Figure 7 The utility model discloses a self-cleaning vacuum baking bin's front view;

[0029] Figure: 1. Bin body;1a. Baking feeding port;1b. Baking vacuumizing port;1c. Air duct;1d. Chain net hot air chamber;

[0030] 2. Head shaft;3. Chain net;4. Tail shaft;

[0031] 5. Steam heater;5a. Heater steam inlet;5b. Heater drain;

[0032] 6. Steam injection cleaning device;6a. Steam injection upper interface;6b. Steam injection lower interface;6c. Steam injection port;

[0033] 7. Chain net injection cleaning pipe;8. Steam injection heating pipe;

[0034] 9. Wet dirt collecting hopper;9a. Cleaning auger motor;9b. Cleaning auger speed reducer;9c. Drain pipe;9d. Hot gas cooling cavity;9e. Drainage port;9f. Negative pressure air outlet;

[0035] 10. Dry dirt collecting hopper. DETAILED DESCRIPTION

[0036] In the following description of the utility model, the orientation or position relation indicated by the terms "front", "back", "left", "right", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not mean that the device must have a particular orientation.

[0037] As Figures 1 to 7As shown, the self-cleaning vacuum baking bin of the utility model, including bin body 1, bin body 1 is formed by bolt connection by multiple box bodies;The top of one end of bin body 1 is equipped with baking feed inlet 1a, and the top of bin body 1 is equipped with baking vacuumizing mouth 1b. The inner cavity of bin body 1 is equipped with multiple baking layers, and the two ends of each baking layer are respectively equipped with head shaft 2 and tail shaft 4, a pair of head shaft chain wheels is installed on the two ends of head shaft 2, a pair of tail shaft chain wheels is installed on the two ends of tail shaft 4, and chain is wrapped between the head shaft chain wheel and the tail shaft chain wheel on the same side, and the corresponding links between the two sides of chain are respectively connected with the web plate of supporting material layer, so as to form annular chain net 3. The chain net hot air chamber 1d of the layer is between the upper layer chain net and the lower layer chain net;The tail end of the top baking layer is located below the baking feed inlet, the tail shaft of the next layer is located below the head shaft of the previous layer, and the head shaft of the next layer is located below the tail shaft of the previous layer, and so on. The material entering from the baking feed inlet first falls on the upper layer chain net of the first layer and advances towards the head shaft, and then falls on the upper layer chain net of the second layer and advances towards the tail shaft of the second layer.

[0038] The two sides of each baking layer are respectively equipped with air duct 1c, circulating fans are respectively installed in the middle of each air duct 1c, and the air outlets of each circulating fan are respectively equipped with steam heater 5. Steam heater 5 includes multiple finned heating tubes arranged in an array, and the upper end of steam heater 5 is equipped with heater steam inlet 5a, saturated steam or superheated steam is introduced, and steam is changed into condensed water after heat exchange, and is discharged from the lower end of heater drain 5b. After being heated by steam heater 5, the hot air in one side air duct enters the chain net hot air chamber 1d between the upper and lower layer chain nets, and then the hot air blows upwards through the material layer to heat the material. After being heated, the hot air enters the other side air duct, is accelerated by the circulating fan on the other side, is heated again by the steam heater 5 on the other side, reenters the chain net hot air chamber 1d, and then circulates to heat the material layer.

[0039] Each steam injection cleaning device 6 is respectively equipped with multiple heater injection cleaning pipes extending vertically and parallel to each other, the upper and lower ends of each heater injection cleaning pipe are respectively connected with horizontal dry pipes, the outer end of the upper horizontal dry pipe is equipped with steam injection upper interface 6a, the outer end of the lower horizontal dry pipe is equipped with steam injection lower interface 6b, and the side of each heater injection cleaning pipe facing steam heater 5 is respectively equipped with steam injection port 6c extending vertically. Steam injection port 6c is a long strip-shaped narrow gap, which is beneficial to improve the flow rate and coverage area of steam, and can spray steam on the surface of steam heater 5 more uniformly.

[0040] When saturated steam is used as the spraying medium, the saturated steam enters from the upper steam injection interface 6a; when superheated steam is used as the spraying medium, the superheated steam enters from the lower steam injection interface 6b. During the hot air circulation process, the superheated steam sprayed from each steam injection port of the steam injection cleaning device 6 sprays towards each finned heating tube of the steam heater 5 to soften and blow off the sticky fat.

[0041] A chain net injection cleaning pipe 7 extending along the width direction is arranged in the chain net hot air chamber 1d of each baking layer, and the bottom of the chain net injection cleaning pipe 7 is provided with a strip-shaped injection port facing the lower chain net. The chain net injection cleaning pipe 7 is located in the middle section of each baking layer and can be arranged in one or multiple sections of the box body. The superheated steam sprayed from each strip-shaped injection port of the chain net injection cleaning pipe 7 can return to the lower chain net for cleaning and also clean the bottom plate.

[0042] A steam injection heating pipe 8 extending along the width direction is arranged above the material of each baking layer, and the bottom of the steam injection heating pipe 8 is provided with a strip-shaped injection port facing the material. The steam injection heating pipe 8 is usually located above the chain net injection cleaning pipe 7 and located in the tail section or the middle section of each baking layer, or arranged in both the tail section and the middle section, for directly spraying superheated steam into the material layer for baking. The material is quickly heated under the condition of locking moisture, which improves the gelatinization rate of starch and effectively inactivates harmful microorganisms.

[0043] A wet dirt collecting hopper 9 is arranged on the bottom plate of each baking layer, and each wet dirt collecting hopper 9 is located below or downstream of the steam injection cleaning point. The two side edges of the wet dirt collecting hopper 9 are inclined, each wet dirt collecting hopper 9 is provided with a circular bottom and a cleaning auger, the tail end of the wet dirt collecting hopper 9 is connected with an outwardly extending dirt discharge pipe 9c, the shaft head of the cleaning auger extends from one end of the wet dirt collecting hopper 9 and is connected with the output end of a cleaning auger reducer 9b, the input end of the cleaning auger reducer 9b is connected with the rotor shaft of a cleaning auger motor 9a.

[0044] The shaft tail of the cleaning auger extends along the axis of the dirt discharge pipe 9c and is supported at the tail of the dirt discharge pipe 9c, the tail end of the dirt discharge pipe 9c is connected with a hot gas flow cooling cavity 9d, the hot gas flow cooling cavity 9d is provided with a cooling coil, and the side wall is provided with a cooling water inlet and a cooling water outlet; the bottom of the hot gas flow cooling cavity 9d is connected with a dirt discharge port 9e, and the side wall of the dirt discharge port 9e is connected with an upwardly inclined negative pressure air outlet 9f.

[0045] The dirt falls through the mesh to the bottom panel, and under the action of blowing and suction, enters the wet dirt collecting hopper 9. The clear auger motor 9a drives the clear auger to rotate through the clear auger reducer 9b. The wet dirt in the wet dirt collecting hopper 9 is transported to the tail end by the clear auger, and enters the hot air cooling cavity 9d through the dirt discharge pipe 9c. The cooling water flows through the cooling coil to indirectly cool the dirt, and the softened dirt is re-condensed and discharged from the dirt discharge port 9e at the lower end. In this process, the negative pressure exhaust port ensures that the inside of the cleaning chain net box is in a micro-negative pressure state, avoiding the hot air or steam flow from straying and causing condensation at other positions, which affects the quality of the material.

[0046] The bottom plate of each baking layer is also provided with a dry dirt collecting hopper 10. The dry dirt collecting hopper 10 of the odd baking layer is located below the tail of the bottom plate, and the dry dirt collecting hopper 10 of the even baking layer is located upstream of the steam blowing cleaning point. The bottom plate cleaning device sweeps the dry material into the dry dirt collecting hopper 10, which is discharged by the clear auger, avoiding a large amount of dry material from entering the wet dirt collecting hopper 9.

[0047] The above only describes the preferred and feasible embodiments of the present application, and does not limit the patent protection range of the present application. In addition to the above embodiments, the present application can also have other implementation manners. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection range required by the present application. The technical features not described in the present application can be realized by or using the prior art, and will not be described here.

Claims

1. A self-cleaning vacuum baking chamber, comprising a chamber body, wherein a baking inlet is provided at the top of one end of the chamber body, characterized in that: The inner cavity of the chamber is provided with multiple baking layers. Each baking layer has a head shaft and a tail shaft at both ends. The head shaft and tail shaft of the same layer are connected by a chain mesh drive. The chain mesh hot air chamber of the layer is located between the upper chain mesh and the lower chain mesh. The tail end of the top baking layer is located below the baking inlet, the tail shaft of the next layer is located below the head shaft of the previous layer, and the head shaft of the next layer is located below the tail shaft of the previous layer; each baking layer has an air duct on both sides, and a circulating fan is installed in the middle of each air duct. Each circulating fan has a steam heater at its outlet, and each steam heater has a steam jet cleaning device on the side facing the incoming air. Each steam jet cleaning device has multiple vertically extending and parallel heater jet cleaning pipes, and each heater jet cleaning pipe has a vertically extending steam jet nozzle on the side facing the steam heater.

2. The self-cleaning vacuum baking chamber according to claim 1, characterized in that: Each baking layer has a chain mesh hot air chamber equipped with a chain mesh spray cleaning pipe extending along the width direction, and the bottom of the chain mesh spray cleaning pipe is provided with a slit-shaped spray nozzle facing the lower chain mesh.

3. The self-cleaning vacuum baking chamber according to claim 2, characterized in that: Each baking layer has a steam jet heating pipe extending along the width direction above the material, and the bottom of the steam jet heating pipe has a slit-shaped injection nozzle facing the material.

4. The self-cleaning vacuum baking chamber according to claim 3, characterized in that: The steam jet heating pipe is located above the chain mesh jet cleaning pipe.

5. The self-cleaning vacuum baking chamber according to claim 2, 3, or 4, characterized in that: Each baking layer has a wet waste collection hopper on its bottom plate, and each wet waste collection hopper is located below or downstream of the steam jet cleaning point.

6. The self-cleaning vacuum baking chamber according to claim 5, characterized in that: Each wet waste collection hopper has a circular bottom and is equipped with a cleaning auger. The bottom of the tail end of the wet waste collection hopper is connected to an outwardly extending drain pipe. The shaft of the cleaning auger extends from one end of the wet waste collection hopper and is connected to the output end of the cleaning auger reducer. The input end of the cleaning auger reducer is connected to the rotor shaft of the cleaning auger motor. The tail of the cleaning auger extends along the axis of the drain pipe and is supported at the tail end of the drain pipe. The bottom outlet of the tail end of the drain pipe is connected to a hot air cooling chamber. The bottom of the hot air cooling chamber is connected to a drain port. The side wall of the drain port is connected to a negative pressure suction port extending obliquely upward.

7. The self-cleaning vacuum baking chamber according to claim 5, characterized in that: Each baking layer is also equipped with a dry waste collection hopper on its base plate. The dry waste collection hoppers for odd-numbered baking layers are located below the tail of the base plate, while the dry waste collection hoppers for even-numbered baking layers are located upstream of the steam jet cleaning point.

8. The self-cleaning vacuum baking chamber according to claim 3, characterized in that: The steam jet heating pipe is located at the tail and / or middle section of each baking layer, and the chain mesh jet cleaning pipe is located in the middle section of each baking layer.

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