Superhigh-temperature instantaneous sterilization steam direct injection mixing nozzle

Abstract

The utility model relates to the technical field of food sterilization, in particular to an ultrahigh-temperature instant sterilization steam direct injection mixing nozzle. Comprising a liquid inlet valve body and a steam valve body which are connected, and further comprises a valve element arranged in the liquid inlet valve body and the steam valve body. A plurality of notches distributed in the periphery of the valve element in a circumferential array mode are formed in the position, at the joint of the liquid inlet valve body and the steam valve body, of the valve element. By adopting the structure designed by the scheme, materials can be atomized into small liquid drops in a spiral form to be jetted into the steam mixing cavity, so that the contact area with steam is greatly increased, and efficient heat transfer and phase change are realized; after the first mixing, the gas-liquid mixed fluid is jetted out again through the annular nozzle, so that bubbles and liquid drops of the gas-liquid mixed fluid are micronized again, the contact surfaces are enlarged, complete heat transfer between steam and materials is achieved, and uniform and stable high-temperature liquid is formed.

Description

TECHNICAL FIELD

[0001] The utility model relates to food sterilization technical field, concretely relates to a kind of ultra-high temperature instantaneous sterilization steam direct injection mixed spray head. BACKGROUND

[0002] The main purpose of milk heat treatment is to kill microorganisms and inactivate enzymes, and the effectiveness of heat treatment and its impact on product quality are mainly related to the combination of temperature-time, the heating method used and the pretreatment conditions of milk. Currently, there are four main heat sterilization methods: pre-heat sterilization, pasteurization, ultra-high temperature instantaneous sterilization, and hold sterilization. After long-term scientific experiments and practical exploration, a relatively unified production model has been formed in countries around the world, mainly including pasteurization and Ultra-high temperature instantaneous sterilization (UHT) sterilization, two forms of heat processing.

[0003] In addition, there is currently an advanced sterilization method - steam direct injection direct sterilization. This technology involves injecting steam directly into milk to raise the temperature, and then passing through a sterilization temperature pipeline under high pressure to achieve instantaneous sterilization. The core breakthrough of this technology is to maximize the preservation of natural nutritional active proteins in milk. Steam direct injection direct sterilization process (infection, referred to as INF) involves direct contact with the heating medium (steam), followed by immediate cooling under vacuum, resulting in high heat transfer efficiency and limiting product quality loss due to excessive heat exposure. The main principle of steam direct injection sterilization is to mix the liquid phase fluid to be sterilized with the steam phase fluid, and use the high temperature of the steam to sterilize the liquid phase fluid. It mainly includes two categories: (1) steam infusion sterilization: spraying the liquid phase fluid into a steam bath for sterilization; (2) steam injection sterilization: forming a circular jet of the liquid phase first, then mixing with the injected steam for sterilization. Steam direct injection (INF) direct sterilization involves direct contact between the material and the heating medium (steam), resulting in high heat transfer efficiency and greatly reducing product quality loss due to excessive heat exposure, which can significantly improve the active nutrients of the product. At the same time, the direct heat transfer of steam greatly reduces heat damage and slagging due to the absence of heat transfer surfaces, and avoids the occurrence of pipe clogging.

[0004] At present, the steam direct injection sterilization technology mainly uses the mixer structure in CN101969782B to realize the mixing and heat transfer of steam and materials. However, the mixing of steam and materials in this structure is only for a very short time through the annular gap. After the steam enters the materials, large-sized bubbles are formed, which greatly reduces the speed of phase change heat transfer, and cannot realize sufficient and complete mixing and heat transfer, thereby causing uneven heating of the materials, and the temperature of local materials being lower than the sterilization temperature, which affects the sterilization effect. Therefore, when the steam direct injection sterilization process is used, the sterilization temperature is usually 3-5 DEG C higher than the traditional indirect sterilization temperature, so as to ensure the sterilization effect. However, the higher sterilization temperature also causes additional heating of the materials, which leads to the loss of active business and sensory flavor. This is one of the reasons why the steam direct injection sterilization technology is currently limited in application. SUMMARY

[0005] The utility model discloses to the steam direct injection mixer in the prior art for the problem of uneven gas-liquid mixing, proposes a kind of nozzle structure with secondary injection mixing function, can obtain better gas-liquid mixing effect.

[0006] To achieve the above object, the utility model provides the following technical scheme: the steam direct injection mixing nozzle of ultra-high temperature instantaneous sterilization, the nozzle includes the liquid inlet valve body and steam valve body connected, the nozzle also includes the valve core being arranged in the liquid inlet valve body and the steam valve body;

[0007] At the connecting place of the liquid inlet valve body and the steam valve body, a plurality of notches are arranged on the outer periphery of the valve core in the form of circumferential array, the notches are arranged obliquely relative to the direction of the valve core, and the other parts of the notches are in abutment with the inner walls of the liquid inlet valve body and the steam valve body.

[0008] Further, the outer periphery of the valve core is provided with a connecting piece in abutment with the inner walls of the liquid inlet valve body and the steam valve body, the notches are located on the connecting piece, the connecting piece includes a circular table arranged in front and back directions, and the notches extend to the side surface of the circular table at the front end.

[0009] The rear end of the valve core is connected with an adjusting screw.

[0010] Further, the rear end of the valve core is provided with an inner end cover, and the outer portion of the inner end cover is provided with an outer end cover.

[0011] Further, a mesh is arranged around the outer side of the valve core in the steam valve body, and a plurality of holes are formed in the mesh.

[0012] Further, a tail nozzle is arranged at the front end of the steam valve body.

[0013] Furthermore, the valve core is provided with an adjustable valve stem with a tail cone.

[0014] Furthermore, the adjustable valve stem with tail cone is connected to an adjusting screw at its rear end.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] After the material enters the nozzle through the feed inlet, it is atomized into small droplets in a spiral shape and sprayed into the steam mixing chamber through the notch. Simultaneously, clean steam enters from the steam inlet and passes through a porous mesh into the steam mixing chamber, where it undergoes its first mixing with the atomized droplets. Because the material has already formed atomized droplets, the contact area with the steam is greatly increased, achieving efficient heat transfer and phase change. The notch design allows the atomized droplets to be sprayed into the steam mixing chamber in a spiral shape, forming a swirling fluid within the chamber and enhancing the mixing effect with the steam.

[0017] After the first mixing, the gas-liquid mixture is ejected again through an annular nozzle, which further refines the bubbles and droplets of the gas-liquid mixture, increases the contact surface, and enables complete heat transfer between the steam and the material, forming a uniform and stable high-temperature liquid. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0019] Figure 2 This is a schematic diagram comparing the effect of this embodiment with that of a traditional mixer;

[0020] In the diagram: 1-Outer end cap; 2-Inner end cap; 3-Adjusting screw; 4-Valve core; 5-Inlet valve body; 6-Inlet; 7-Notch; 71-Connector; 72-Frustum; 8-Steam valve body; 9-Mesh; 10-Steam inlet; 11-Tail nozzle; 12-Adjustable valve stem with tail cone. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1 As shown, the ultra-high temperature instantaneous sterilization steam direct injection mixing nozzle of this utility model includes an outer end cap 1, a liquid inlet valve body 5, and a steam valve body 8 connected sequentially from the rear end.

[0023] The inner end cover 2 is provided with a valve core 4 at the front end, which is axially arranged along the liquid inlet valve body 5 and the steam valve body 8, and is internally provided with an adjustable tail vertebra valve rod 12, the front end of which extends outside the tail jet 11 of the steam valve body 8, and the rear end is connected with the adjusting screw 3 through the inner end cover 2, so that the relative position of the valve core 4 in the nozzle can be adjusted by the adjusting screw 3.

[0024] At the connection between the liquid inlet valve body 5 and the steam valve body 8, the valve core 4 is provided with a connecting piece 71 abutting against the inner wall of the liquid inlet valve body 5 and the steam valve body 8, which includes a circular table 72 arranged in the front and rear directions, and a plurality of notches 7 arranged in a circumferential array are arranged at the outer end surface of the connecting piece 71, that is, the connection intersection of the two circular tables 72, the notches 7 are arranged inclinedly relative to the direction of the valve core 4 and are directed to the same direction and extend forward to the side surface of the circular table 72 at the front end, so that when the relative position of the valve core 4 in the nozzle is adjusted by the adjusting screw 3, the gap between the notches 7 and the liquid inlet valve body 5 and the steam valve body 8 is also adjusted.

[0025] In addition, as can be seen from the figure, the liquid inlet valve body 5 is provided with a liquid inlet 6, and the steam valve body 8 is provided with a steam inlet 10, so that when the material enters the liquid inlet valve body 5 from the liquid inlet 6, the material can be atomized into small droplets in a spiral form through the notches 7 and sprayed into the steam valve body 8, at the same time, clean steam enters from the steam inlet 10 and enters the steam valve body 8 through a perforated mesh 9 arranged around the outer side of the valve core 4, and is mixed with the above-mentioned atomized small droplets for the first time.

[0026] Since the material has become atomized small droplets, the contact area with the steam can be greatly increased, and more efficient heat transfer and phase change can be achieved. The spiral spraying mode can also make the droplets form a vortex-like flow in the steam valve body 8, further enhancing the mixing effect with the steam.

[0027] After the first mixing, the gas-liquid mixture is sprayed out again through the tail jet 11, so as to further fine the bubbles and droplets of the gas-liquid mixture, increase the contact surface, and make the steam and the material realize complete heat transfer to form a uniform and stable high-temperature liquid. Correspondingly, the adjusting screw 3 can realize different spraying speeds by adjusting the relative position of the valve core 4 in the nozzle.

[0028] As Figure 2It is shown that it shows the temperature fluctuation of the material in 1 hour after mixing and heating compared with the conventional mixer. The material is milk, and the sterilization temperature is set to 135 DEG C. It can be seen that the temperature fluctuation of the embodiment is 134.8-135.3 DEG C, and the temperature fluctuation of the conventional mixer is 134.3-135.9 DEG C. Compared with the conventional steam mixer, the utility model can realize better steam and liquid mixing effect, the temperature of the mixed material is more uniform, and better sterilization effect can be realized.

[0029] The contents not described in detail in the specification belong to the prior art known to the person skilled in the art.

[0030] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An ultra-high temperature flash pasteurization steam direct injection hybrid spray head characterized by, The spray head comprises a liquid inlet valve body and a steam valve body connected together, and a valve core arranged in the liquid inlet valve body and the steam valve body; At the connection between the liquid inlet valve body and the steam valve body, a plurality of notches are arranged on the outer periphery of the valve core in a circumferential array, and the notches are arranged obliquely relative to the direction of the valve core, and the other parts of the notches abut against the inner walls of the liquid inlet valve body and the steam valve body.

2. The ultra-high-temperature, flash-pasteurizing, steam-straight- jet, mixing spray head of claim 1, wherein, The outer periphery of the valve core is provided with a connecting piece abutting against the inner walls of the liquid inlet valve body and the steam valve body, and the notches are arranged on the connecting piece, the connecting piece comprises a circular table arranged in the front and back directions, and the notches extend to the side surface of the circular table at the front end. The rear end of the valve core is connected with an adjusting screw rod.

3. The ultra-high-temperature, flash-pasteurization, steam-straight- injection, hybrid spray head of any one of claims 1 or 2, wherein, The rear end of the valve core is provided with an inner end cover, and the outer part of the inner end cover is provided with an outer end cover.

4. The ultra-high-temperature, flash-pasteurizing, steam- direct-injection, hybrid spray head of claim 1, wherein, The steam valve body is provided with a mesh arranged around the outer side of the valve core, and a plurality of holes are arranged on the mesh.

5. The ultra-high-temperature, flash-pasteurizing, steam- direct-injection, hybrid spray head of claim 1, wherein, The front end of the steam valve body is provided with a tail spray port.

6. The ultra-high-temperature, flash-pasteurizing, steam-straight- jet, mixing spray head of claim 1, wherein, The valve core is provided with an adjustable tail vertebra valve rod.

7. The ultra-high-temperature, flash-pasteurizing, steam-straight- jet, mixing spray head of claim 6, wherein, The adjustable tail vertebra valve rod is connected with an adjusting screw rod at the rear end.

Images