Horizontal self-cleaning continuous drying equipment

Abstract

The utility model discloses horizontal self-cleaning continuous drying equipment which is characterized in that a head shaft and a tail shaft in a dryer bin body are connected through chain nets, and a chain net hot air chamber is arranged between the upper layer chain net and the lower layer chain net; a chain net jet cleaning pipe extending in the breadth direction is arranged in the chain net hot air chamber, and the bottom of the chain net jet cleaning pipe is provided with a slot-shaped jet orifice facing the lower-layer chain net. A plurality of wet dirt collecting hoppers are arranged at the bottom of the dryer bin body, each wet dirt collecting hopper is provided with a material cleaning auger, the bottom of the tail end of each wet dirt collecting hopper is connected with a dirt discharging pipe extending outwards, and a shaft head of each material cleaning auger extends out of one end of the corresponding wet dirt collecting hopper and is connected with the output end of a material cleaning auger speed reducer; the shaft tail of the material cleaning auger extends along the axis of the blow-off pipe and is supported at the tail of the blow-off pipe, an outlet in the bottom of the tail end of the blow-off pipe is connected with a hot air cooling cavity and a blow-off opening, and the side wall of the blow-off opening is connected with a negative pressure exhaust outlet extending upwards in an inclined mode. According to the equipment, fat and other impurities bonded on the chain net can be removed on line, and materials can be directly heated and sterilized.

Description

Technical Field

[0001] This utility model relates to a horizontal self-cleaning continuous drying equipment for baking materials such as grains, pet food, and feed, and belongs to the technical field of drying equipment. Background Art

[0002] Pellets such as pet food or other food products require baking during processing, typically using tunnel ovens or drying chambers. These machines usually employ chain conveyors or steel belts to support the materials. High-temperature, high-speed hot air passes through the material's surface, causing moisture to evaporate. However, the following problems exist during use:

[0003] 1. High-fat and high-protein products will release oil under high temperature and hot air. The released oil will adhere to the chain mesh or steel belt. When hot air penetrates the chain mesh, it is easy to spray the attached dirt off and into the product, causing contamination. The dirt attached to the steel belt is also easily absorbed by the high-humidity product and falls off, affecting the quality of the product.

[0004] 2. When high-temperature, high-speed hot air blows over the surface of the material, it can cause the material to lose water too quickly, and the surface of the material is prone to forming an "armor", which is not conducive to the penetration of internal water; too low moisture content is also not conducive to starch gelatinization.

[0005] 3. If the temperature of the material is too low, it is prone to rancidity, which can breed harmful microorganisms and affect the safety of the material.

[0006] 4. After a short period of operation, the mesh plates or pallets supporting the materials need to be shut down and cleaned by soaking. The finned heating tubes of the steam heater are even more difficult to clean. The cleaning process is time-consuming and labor-intensive, with poor results, and seriously affects the output and stability of the production line. Utility Model Content

[0007] The purpose of this invention is to overcome the problems existing in the prior art and provide a horizontal self-cleaning continuous drying equipment that can automatically remove impurities such as grease adhering to the chain mesh during the production process, avoid cross-contamination or mixing of materials, ensure long-term stable production, and at the same time directly heat and sterilize the materials, thereby improving energy utilization efficiency.

[0008] To solve the above technical problems, this utility model provides a horizontal self-cleaning continuous drying device, including a drying chamber. A dryer inlet is located at the top of one end of the drying chamber, and a dryer outlet is located at the bottom of the drying chamber. A head shaft and a tail shaft are respectively located at both ends of the inner cavity of the drying chamber. The head shaft and tail shaft are connected by a chain mesh drive. A chain mesh hot air chamber is located between the upper and lower chain mesh layers. A chain mesh spray cleaning pipe extending along the width direction is provided in the chain mesh hot air chamber. The bottom of the chain mesh spray cleaning pipe has a slit-shaped spray nozzle facing the lower chain mesh. Multiple sinking wet waste containers are located at the bottom of the drying chamber. Each wet waste collection hopper has a circular bottom and is equipped with a cleaning auger. The bottom of the tail end of each 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 an upwardly extending negative pressure exhaust port.

[0009] As an improvement of this utility model, a steam jet heating pipe extending along the width direction is provided above the material layer of the upper chain mesh, and the bottom of the steam jet heating pipe is provided with a slit-shaped injection port facing the material.

[0010] As a further improvement of this utility model, the steam jet heating pipe is located above the chain mesh jet cleaning pipe.

[0011] As a further improvement of this utility model, the inner cavity of the dryer chamber is provided with multiple drying layers, and each drying layer is provided with the chain mesh spray cleaning pipe and the steam spray heating pipe.

[0012] As a further improvement of this utility model, the discharge port of the dryer is connected to the baking inlet of the vacuum baking chamber.

[0013] Compared with the prior art, this utility model has achieved the following beneficial effects: 1. The upper chain mesh of the baking layer carries the material and moves towards the head shaft. Hot air enters the hot air chamber of the chain mesh between the upper and lower chain meshes. Then, the hot air blows upward over the material layer to heat the material. The lower chain mesh returns to the tail shaft empty. During this process, the superheated steam sprayed from each slit-shaped nozzle of the chain mesh spray cleaning pipe softens and blows off the grease adhering to the lower chain mesh. The cleaned chain mesh returns to the upper layer to carry new material, avoiding cross-contamination. The blown-off dirt and the condensate formed by steam condensation enter the wet dirt collection hopper for collection, realizing automatic online cleaning, improving the degree of automation and reducing manual labor intensity.

[0014] 2. The water-containing waste entering the wet waste collection hopper is conveyed to the tail end by the cleaning auger, and enters the hot air cooling chamber through the drain pipe. After being indirectly cooled by the hot air cooling chamber, the softened waste is re-condensed and discharged from the drain port at the bottom. During this process, the negative pressure exhaust port ensures that the inside of the box section where the cleaning chain is located is in a slightly negative pressure state, avoiding the hot air or steam flow from running around and condensing in other places, which would affect the quality of the material.

[0015] 3. It also uses steam jet heating pipes to directly heat and sterilize materials, using superheated steam for baking, avoiding energy conversion and improving energy efficiency; while locking in moisture, the materials heat up quickly, increasing the gelatinization rate of starch, effectively inactivating harmful microorganisms, ensuring the safety of pet food or food, and improving the flavor and taste of baked pet food or baked goods.

[0016] 4. The dryer can be used in series with the vacuum baking chamber to pre-dry and sterilize the materials, thereby improving the production capacity and efficiency of vacuum baking. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The drawings are provided for reference and illustration only and are not intended to limit the present invention.

[0018] Figure 1 This is a front view of the horizontal self-cleaning continuous drying equipment of this utility model;

[0019] Figure 2 This is a perspective view of the tail section housing of this utility model;

[0020] Figure 3 This is a perspective view of the intermediate section box body in this utility model;

[0021] Figure 4 This is a perspective view of the present invention with the head and tail boxes removed.

[0022] Figure 5 This is a perspective view of the wet waste collection hopper in this utility model;

[0023] Figure 6 This is a reference diagram showing the usage state of this utility model;

[0024] In the diagram: 1. Fabric fabrication mechanism;

[0025] 2. Dryer chamber; 2a. Dryer inlet; 2b. Dryer outlet;

[0026] 3. Tail shaft; 4. Chain mesh; 5. Head shaft; 6. Chain mesh hot air chamber; 7. Chain mesh spray cleaning pipe; 8. Steam spray heating pipe;

[0027] 9. Wet waste collection hopper; 9a. Cleaning auger motor; 9b. Cleaning auger reducer; 9c. Sewage pipe; 9d. Hot air cooling chamber; 9e. Sewage outlet; 9f. Negative pressure exhaust outlet;

[0028] 10. Vacuum baking chamber. DETAILED DESCRIPTION

[0029] In the following description of this utility model, the terms "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device must have a specific orientation.

[0030] like Figures 1 to 5 As shown, the horizontal self-cleaning continuous drying equipment of this utility model includes a drying chamber 2. A drying inlet 2a is provided at the top of one end of the drying chamber 2, and a cloth feeding mechanism 1 is installed above the drying inlet 2a. A drying outlet 2b is provided at the bottom of the other end of the drying chamber 2. A head shaft 5 and a tail shaft 3 are respectively provided at both ends of the inner cavity of the drying chamber 2. A pair of head shaft sprockets are installed at both ends of the head shaft 5, and a pair of tail shaft sprockets are installed at both ends of the tail shaft 3. A chain is wrapped between the head shaft sprocket and the tail shaft sprocket on the same side. A mesh plate supporting the material layer is connected between the corresponding links of the chain on both sides, thus forming a ring-shaped chain mesh 4. A chain mesh hot air chamber 6 is located between the upper chain mesh and the lower chain mesh.

[0031] After being fed by the feeding mechanism 1, the material enters the inner cavity of the dryer chamber 2 through the feed inlet 2a and falls onto the upper chain mesh. The upper chain mesh carries the material forward toward the head shaft. During the forward movement, hot air from the outside enters the chain mesh hot air chamber 6 and then blows upward over the material layer to heat the material.

[0032] High-fat, high-protein materials will release grease under high-temperature heating. The released grease adheres to the chain mesh, and when hot air penetrates the chain mesh, it easily sprays off the adhered dirt and causes contamination of the product. Therefore, a chain mesh spray cleaning pipe 7 extending along the width direction is provided in the chain mesh hot air chamber 6. The bottom of the chain mesh spray cleaning pipe 7 has a slit-shaped spray nozzle facing the lower chain mesh. The superheated steam sprayed from the slit-shaped spray nozzle of the chain mesh spray cleaning pipe 7 washes the lower chain mesh, softening the grease and blowing it off.

[0033] The bottom of the dryer chamber 2 is provided with multiple sunken wet waste collection hoppers 9. The two sides of each wet waste collection hopper 9 are sloping. Each wet waste collection hopper 9 has a circular bottom and is equipped with a cleaning auger. The bottom of the tail end of the wet waste collection hopper 9 is connected to an outwardly extending drain pipe 9c. The shaft of the cleaning auger extends from one end of the wet waste collection hopper 9 and is connected to the output end of the cleaning auger reducer 9b. The input end of the cleaning auger reducer 9b is connected to the rotor shaft of the cleaning auger motor 9a.

[0034] The tail of the cleaning auger extends along the axis of the drain pipe 9c and is supported at the tail of the drain pipe 9c. The bottom outlet of the tail end of the drain pipe 9c is connected to a hot air cooling chamber 9d. The hot air cooling chamber 9d is equipped with a cooling coil, and the side walls are respectively provided with a cooling water inlet and a cooling water outlet. The bottom of the hot air cooling chamber 9d is connected to a drain port 9e, and the side wall of the drain port 9e is connected to a negative pressure exhaust port 9f extending obliquely upward.

[0035] The dirt enters the wet dirt collection hopper 9 under the action of superheated steam injection and negative pressure suction. The cleaning auger motor 9a drives the cleaning auger to rotate through the cleaning auger reducer 9b. The wet dirt in the wet dirt collection hopper 9 is transported to the tail end by the cleaning auger and enters the hot air cooling chamber 9d through the drain pipe 9c. The cooling water flows through the cooling coil to indirectly cool the dirt. The softened dirt re-condenses and is discharged from the drain port 9e at the bottom. During this process, the negative pressure exhaust port ensures that the inside of the box section where the cleaning chain is located is in a slightly negative pressure state, avoiding the hot air or steam flow from running around and condensing in other places, which would affect the quality of the material.

[0036] A steam jet heating pipe 8 extending along the width direction is provided above the material layer of the upper chain mesh. The bottom of the steam jet heating pipe 8 has a slit-shaped injection nozzle facing the material. The steam jet heating pipe 8 is preferably arranged above the chain mesh spray cleaning pipe 7, located at the tail or middle section of each baking layer, or it can be arranged at both the tail and middle sections. It is used to spray superheated steam into the material layer for direct drying. The material heats up rapidly while locking in moisture, which improves the gelatinization rate of starch and effectively inactivates harmful microorganisms.

[0037] The dryer can be used independently. When the drying intensity is increased, the inner cavity of the dryer chamber 2 can be provided with multiple drying layers. Each drying layer is provided with a chain mesh spray cleaning pipe 7 and a steam spray heating pipe 8.

[0038] like Figure 6 As shown, the dryer outlet 2b of the dryer chamber 2 is connected to the baking inlet of the vacuum baking chamber 10, so that the dryer can be used as a pre-dryer before high-temperature baking, realizing the connection of the two devices in series and improving the overall production capacity.

[0039] The above description is merely a preferred embodiment of this utility model and does not limit the scope of patent protection of this utility model. Besides the above embodiments, this utility model may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model. Technical features not described in this utility model can be implemented by or using existing technology, and will not be elaborated upon here.

Claims

1. A horizontal self-cleaning continuous drying device, comprising a drying chamber, wherein a drying inlet is provided at the top of one end of the drying chamber, and a drying outlet is provided at the bottom of the drying chamber, characterized in that: The inner cavity of the dryer chamber is provided with a head shaft and a tail shaft at both ends, and the head shaft and tail shaft are connected by a chain mesh drive. The upper chain mesh and the lower chain mesh are connected by a chain mesh hot air chamber. The chain mesh hot air chamber is provided with a chain mesh spray cleaning pipe extending along the width direction. The bottom of the chain mesh spray cleaning pipe is provided with a slit-shaped spray nozzle facing the lower chain mesh. The bottom of the dryer chamber is equipped with multiple sunken wet waste collection hoppers. Each wet waste collection hopper has a circular bottom and is equipped with a cleaning auger. The bottom of the tail end of each 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 an upwardly extending negative pressure exhaust port.

2. The horizontal self-cleaning continuous drying equipment according to claim 1, characterized in that: A steam jet heating pipe extending along the width direction is provided above the material layer of the upper chain mesh, and the bottom of the steam jet heating pipe is provided with a slit-shaped injection port facing the material.

3. The horizontal self-cleaning continuous drying equipment according to claim 2, characterized in that: The steam jet heating pipe is located above the chain mesh jet cleaning pipe.

4. The horizontal self-cleaning continuous drying equipment according to claim 2, characterized in that: The inner cavity of the dryer chamber is provided with multiple drying layers, and each drying layer is provided with the chain mesh spray cleaning pipe and the steam spray heating pipe.

5. The horizontal self-cleaning continuous drying equipment according to any one of claims 1 to 4, characterized in that: The dryer's discharge port is connected to the baking inlet of the vacuum baking chamber.

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