CN112375661A

CN112375661A - Spraying system

Info

Publication number: CN112375661A
Application number: CN202011130361.XA
Authority: CN
Inventors: 张志炳; 孟为民; 周政; 王宝荣; 杨高东; 罗华勋; 张锋; 李磊; 杨国强; 田洪舟; 曹宇
Original assignee: Nanjing Institute of Microinterface Technology Co Ltd
Current assignee: Nanjing Institute of Microinterface Technology Co Ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-02-19
Also published as: WO2022082623A1

Abstract

The invention provides a spraying system, comprising: a tank body; the middle area of the bottom surface of the tank body is upwards protruded to form a plane, liquid outlets are respectively arranged at the two side leveling parts of the protruded plane of the bottom surface of the tank body, and a liquid inlet is arranged on the side wall of the tank body; the upper portion is provided with liquid sprayer in the jar body, and liquid sprayer's bottom is the plane, and the top semicircular arc face has arranged a plurality of injection ports on the semicircular arc face in proper order, and the injection direction of injection port is towards the top of the jar body, and the inlet passes through the pipeline and is connected with liquid sprayer's bottom. The spraying system of the invention saves the labor cost of cleaning and field operation.

Description

Spraying system

Technical Field

The invention relates to the field of spraying, in particular to a spraying system.

Background

The spraying system is widely applied, especially, the spraying system is most widely applied to chemical devices, for example, the spraying system is required to be used in equipment such as a reactor and a desulfurizing tower, the spraying system is not limited to the cleaning equipment for spraying cleaning water through a spraying pipeline, and raw materials participating in actual reaction can be fused with other materials in a spraying mode.

In particular, spray systems have found good application in industrial fermentation, which is an industrial process for converting fermentation feedstock into microbial products needed by humans through the vital activities of microorganisms. In our country, the fermentation industry has been developed greatly in recent years as an important branch in biotechnology, and new fermentation industries (e.g., amino acids, enzyme preparations, organic acids, single-cell proteins, starch sugars, etc.) have been increasing at an average rate of 21% per year. To date, China has formed a fermentation industrial system with various varieties, complete categories and a considerable scale, and the product application covers various industries such as medicine, sanitation, light industry, agriculture, energy, environmental protection and the like.

However, the existing fermentation process requires a lot of manpower, including access to the inside of the tank through a manhole, washing, and on-site operation of valves of various pipes. Therefore, the labor cost is improved, and the production safety is reduced.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The invention aims to provide a spraying system, which is characterized in that a liquid ejector is arranged in a tank body, on one hand, the liquid ejector can efficiently crush water for cleaning the tank body into micron-sized liquid drops, and the micron-sized liquid drops are cleaned by impacting the liquid ejector above the tank body instead of manpower, and in addition, raw materials actually participating in reaction can also be efficiently crushed into micron-sized liquid drops, so that the effect of improving reaction mass transfer is achieved.

In order to achieve the above purpose of the present invention, the following technical solutions are adopted:

the invention provides a spray system comprising: a tank body; the middle area of the bottom surface of the tank body protrudes upwards to form a plane, liquid outlets are respectively arranged at the two side leveling parts of the protruding plane of the bottom surface of the tank body, and a liquid inlet is arranged on the side wall of the tank body;

the upper portion of the tank body is provided with a liquid ejector, the bottom of the liquid ejector is a plane, the top of the liquid ejector is a semicircular arc surface, a plurality of jet orifices are sequentially arranged on the semicircular arc surface, the jet direction of the jet orifices faces the top of the tank body, and the liquid inlet is connected with the bottom of the liquid ejector through a pipeline.

In the prior art, the spraying system is widely applied, especially, the spraying system is most widely applied to chemical devices, for example, the spraying system is required to be used in equipment such as a reactor and a desulfurizing tower, the spraying system is not limited to the cleaning equipment for spraying cleaning water through a spraying pipeline, and raw materials participating in actual reaction can be fused with other materials in a spraying mode.

The invention provides a spraying system with a specific structure in order to improve the practical application effect of the spraying system, and the spraying system is mainly characterized in that liquid is efficiently crushed into a mist shape in the spraying process of a spray opening arranged on a semicircular arc surface, so that the spraying effect is improved, and the mass transfer effect is correspondingly improved. Certainly, the spraying system of the invention is not limited to the application in the aspect of cleaning device, and can be applied to any area where the chemical process needs to be sprayed, and particularly, the system with the spraying structure of the invention can be correspondingly installed in the reactor, so that the raw materials are efficiently crushed into mist through the spraying openings, thereby improving the contact area between the raw materials, improving the reaction efficiency, and further improving the indexes such as raw material conversion rate, yield and the like.

In addition, the reason that the center of the tank body protrudes upwards is to discharge materials in the tank body from the liquid outlet efficiently, and if the bottom of the tank body is flat, a small amount of materials are left, so that the center of the bottom of the tank body protrudes upwards to form a plane preferably according to the scheme of the invention. Of course, the bulge is in a semicircular arc shape, so that the possibility of liquid accumulation can be reduced. And the discharge port is arranged in a conical structure, so that the discharge of the materials can be accelerated.

Preferably, a mesh surface with a plurality of uniformly distributed micropores is laid in each spray opening.

The liquid ejector is mainly connected with the liquid inlet through a pipeline, cleaning water is introduced into the liquid ejector and is ejected through the ejection openings on the semicircular arc surface of the liquid ejector, the semicircular arc surface structure is designed to improve the cleaning effect and ensure that the ejected cleaning water can carry out all-around cleaning on the wall surface of the tank body, and in addition, preferably, a net surface with a plurality of micropores uniformly distributed is paved in each ejection opening, so that the ejected water is broken and dispersed into fog to improve the mass transfer effect, and the corresponding effect of the micro-interface generator is also achieved.

Preferably, the liquid inlet is connected with the central position of the bottom of the liquid ejector through a pipeline, so that the entering liquid just enters from the middle of the liquid ejector, and the liquid can be ejected more uniformly.

Preferably, a stirring paddle is arranged at the central bulge of the bottom in the tank body to play a role in accelerating discharging. The bellied position sets up the stirring rake also is in order to improve fermentation product exhaust efficiency, can also promote fermentation efficiency through the stirring moreover.

In order to improve the stirring effect, the number of the stirring paddles is preferably two, and the stirring paddles are arranged at the raised plane at the bottom of the tank body side by side.

Preferably, the spraying system of the invention further comprises a plurality of high-temperature steam pipelines for sterilizing the tank body, and the high-temperature steam pipelines are used for effectively sterilizing the materials to be sterilized respectively.

Preferably, an ultrasonic sterilization device is arranged in the tank body and is tightly attached to the inner wall of the tank body, so that steam can be introduced into the tank body through a steam pipeline, and the ultrasonic sterilization device can be used for assisting sterilization.

Preferably, the number of the liquid inlets is two, one of the liquid inlets is connected with the liquid ejector through a pipeline, and the other liquid inlet is arranged at a position close to the bottom of the tank body. When the inner part of the tank body is cleaned, the cleaning effect on the upper part in the tank body can be achieved, and the cleaning effect on the lower part in the tank body can also be achieved.

Preferably, the micro-interface generator can be arranged in the tank body, and the micro-interface generator and the liquid ejector are combined for use, so that the effect of mutual cooperation between the micro-interface generator and the liquid ejector is improved.

Preferably, the micro-interface generator is a single one that can meet practical process requirements, and its specific type is preferably a pneumatic micro-interface generator because the pneumatic type is relatively low cost and easy to install.

The micro-interface generator in the tank body breaks air into micro-bubbles with micron scale, and releases the micro-bubbles to the inside, so that the phase boundary mass transfer area between raw materials in the reaction process is increased, two phases are fully contacted, the concentration of dissolved gas in a liquid phase is improved, the efficiency is improved, and the reaction time is shortened.

It will be appreciated by those skilled in the art that the micro-interface generator used in the present invention is described in the prior patents of the present inventor, such as the patents of application numbers CN201610641119.6, CN201610641251.7, CN201710766435.0, CN106187660, CN105903425A, CN109437390A, CN205833127U and CN 207581700U. The detailed structure and operation principle of the micro bubble generator (i.e. micro interface generator) is described in detail in the prior patent CN201610641119.6, which describes that "the micro bubble generator comprises a body and a secondary crushing member, wherein the body is provided with a cavity, the body is provided with an inlet communicated with the cavity, the opposite first end and second end of the cavity are both open, and the cross-sectional area of the cavity decreases from the middle of the cavity to the first end and second end of the cavity; the secondary crushing member is disposed at least one of the first end and the second end of the cavity, a portion of the secondary crushing member is disposed within the cavity, and an annular passage is formed between the secondary crushing member and the through holes open at both ends of the cavity. The micron bubble generator also comprises an air inlet pipe and a liquid inlet pipe. "the specific working principle of the structure disclosed in the application document is as follows: liquid enters the micro-bubble generator tangentially through the liquid inlet pipe, and gas is rotated at a super high speed and cut to break gas bubbles into micro-bubbles at a micron level, so that the mass transfer area between a liquid phase and a gas phase is increased, and the micro-bubble generator in the patent belongs to a pneumatic micro-interface generator.

In addition, the first patent 201610641251.7 describes that the primary bubble breaker has a circulation liquid inlet, a circulation gas inlet and a gas-liquid mixture outlet, and the secondary bubble breaker communicates the feed inlet with the gas-liquid mixture outlet, which indicates that the bubble breakers all need to be mixed with gas and liquid, and in addition, as can be seen from the following drawings, the primary bubble breaker mainly uses the circulation liquid as power, so that the primary bubble breaker belongs to a hydraulic micro-interface generator, and the secondary bubble breaker simultaneously introduces the gas-liquid mixture into an elliptical rotating ball for rotation, thereby realizing bubble breaking in the rotating process, so that the secondary bubble breaker actually belongs to a gas-liquid linkage micro-interface generator. In fact, the micro-interface generator is a specific form of the micro-interface generator, whether it is a hydraulic micro-interface generator or a gas-liquid linkage micro-interface generator, however, the micro-interface generator adopted in the present invention is not limited to the above forms, and the specific structure of the bubble breaker described in the prior patent is only one of the forms that the micro-interface generator of the present invention can adopt.

Furthermore, the prior patent 201710766435.0 states that the principle of the bubble breaker is that high-speed jet flows are used to achieve mutual collision of gases, and also states that the bubble breaker can be used in a micro-interface strengthening reactor to verify the correlation between the bubble breaker and the micro-interface generator; moreover, in the prior patent CN106187660, there is a related description on the specific structure of the bubble breaker, see paragraphs [0031] to [0041] in the specification, and the accompanying drawings, which illustrate the specific working principle of the bubble breaker S-2 in detail, the top of the bubble breaker is a liquid phase inlet, and the side of the bubble breaker is a gas phase inlet, and the liquid phase coming from the top provides the entrainment power, so as to achieve the effect of breaking into ultra-fine bubbles, and in the accompanying drawings, the bubble breaker is also seen to be of a tapered structure, and the diameter of the upper part is larger than that of the lower part, and also for better providing the entrainment power for the liquid phase.

Since the micro-interface generator was just developed in the early stage of the prior patent application, the micro-interface generator was named as a micro-bubble generator (CN201610641119.6), a bubble breaker (201710766435.0) and the like in the early stage, and is named as a micro-interface generator in the later stage along with the continuous technical improvement, and the micro-interface generator in the present invention is equivalent to the micro-bubble generator, the bubble breaker and the like in the prior art, and has different names.

In summary, the micro-interface generator of the present invention belongs to the prior art, although some micro-interface generators belong to the pneumatic type micro-interface generator, some micro-interface generators belong to the hydraulic type micro-interface generator, and some micro-interface generators belong to the gas-liquid linkage type micro-interface generator, the difference between the types is mainly selected according to the different specific working conditions, and the connection between the micro-interface generator and the reactor and other devices, including the connection structure and the connection position, is determined according to the structure of the micro-interface generator, which is not limited.

Compared with the prior art, the invention has the beneficial effects that:

(1) according to the spraying system, the liquid ejector is arranged in the tank body, on one hand, the liquid ejector can efficiently crush water for cleaning the tank body into micron-sized liquid drops, and the micron-sized liquid drops are collided above the tank body through the liquid ejector to replace manual cleaning, and on the other hand, raw materials actually participating in reaction can be efficiently crushed into micron-sized liquid drops at the same time, so that the effect of improving reaction mass transfer is achieved;

(2) the spraying system can cooperate with the micro-interface generator to lead the micro-interface generator to break the air into micro-bubbles with micron scale and release the micro-bubbles into the interior so as to increase the mass transfer area of the phase boundary between the raw materials in the reaction process, lead the two phases to be fully contacted, improve the concentration of dissolved gas in the liquid phase, improve the efficiency and shorten the reaction time.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of a spraying system provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a mesh surface of the spraying system provided in the embodiment of the present invention.

Description of the drawings:

10-a tank body; 101-liquid inlet;

102-a liquid outlet; 103-a liquid ejector;

1031-jet orifice; 1032-mesh side;

104-stirring paddle; 105-ultrasonic sterilization apparatus.

Detailed Description

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to more clearly illustrate the technical solution of the present invention, the following description is made in the form of specific embodiments.

Examples

Referring to fig. 1, a spraying system according to an embodiment of the present invention mainly includes a tank 10, a liquid injector 103 and a micro-interface generator are disposed in the tank 10, the liquid injector 103 and the micro-interface generator may be disposed oppositely, a liquid inlet 101 is disposed on a side wall of the tank 10, the liquid injector 103 is connected to the liquid inlet 101 through a pipeline, a top surface of the liquid injector 103 is a semicircular arc surface, a plurality of injection ports 1031 are sequentially arranged on the semicircular cambered surface, the injection direction of the injection ports 1031 faces the top of the tank body 10, the liquid inlet 101 is connected with the bottom of the liquid ejector 103 through a pipeline, optimally, the bottom center of the liquid ejector 103, the liquid entering the liquid jet head 103 is broken into micro-droplets having a diameter of a micron order and jetted from the jet port 1031 having a convex surface to collide with the top of the can body for efficient cleaning. In order to improve the spraying effect, a mesh surface 1032 with a plurality of uniformly distributed micropores is laid in the spraying opening 1031, the number of the mesh surfaces 1032 is not limited, in order to spray the liquid in a mist form and improve the mass transfer effect, and the structure of the mesh surface 1032 is specifically shown in fig. 2.

The bottom of the tank 10 is provided with a liquid outlet 102 for discharging the materials accumulated at the bottom of the tank 10. The bottom both sides of the jar body 10 level and smooth, and central point puts the upwards arch and is the plane, levels the position in the both sides of the bottom of the jar body 10 and is provided with respectively the liquid outlet 102, and the protruding plane in bottom central point is provided with stirring rake 104 in the jar body 10 in order to play the effect of arranging the material with higher speed, and the direction of blade is up to be used for the stirring when the jar body 10 bottom is washed and is discharged the liquid, and the rotational speed can infinitely variable control. Preferably, the number of the stirring paddles is two, and the stirring paddles are arranged at the raised plane at the bottom of the tank body 10 side by side.

In order to improve the mass transfer effect, two liquid inlets 101 are arranged on the side wall of the tank body 10, wherein one liquid inlet 101 is connected with the liquid ejector 103 through a pipeline, and the other liquid inlet 101 is arranged at a position close to the bottom of the tank body 10. This allows for efficient liquid feed to various locations within the tank 10.

The tank 10 of the present invention can also realize a sterilization function, wherein each feed line is correspondingly provided with a steam pipeline, and the inner side wall surface of the tank 10 is correspondingly provided with an ultrasonic sterilization device 105 to assist the steam pipeline in sterilization.

This embodiment also includes a PLC (or DCS, PLC and DCS) control system: and the sensor connected with the tank body 10 is used for intelligently controlling the process operation and parameters, so that the remote control of production is realized, and the production intelligence is met.

The spraying system of the embodiment of the invention has the following working process, taking cleaning as an example:

(1) cleaning: the cleaning water above the tank body 10 is conveyed to the inside of the liquid ejector 103 through the liquid inlet 101, is sprayed out through the spray opening 1031 on the arc surface, is efficiently crushed into micron-sized (d is more than or equal to 1 mu m and less than 1mm) liquid drops through the mesh surface 1032, is sprayed out from the spray opening 1031 protruding on the surface of the liquid ejector 103, collides with the top of the tank body 10, and is cleaned above. The cleaned liquid drops form a liquid level at the bottom of the tank, when the liquid level rises to the middle of the tank body 10, the upper water conveying valve is closed, and the stirring paddle 104 at the bottom is opened to 200 rpm. Because the installation direction of the blades of the stirring paddle 104 is downward, the liquid above the blades is pumped to the two sides below the blades, and vortexes are formed on the two sides of the stirring paddle 104, so that the two sides of the lower part of the tank body 10 are washed and cleaned. And simultaneously, a water channel below the tank body is opened, the side wall of the tank body is cleaned by input water flow under the action of the stirring paddle 104, a water delivery valve is closed after the tank body is washed for 30min, the rotating speed is reduced to 100rpm/min, water is discharged through the liquid outlets 102 on the two sides of the lower end of the tank body 10, the liquid outlet 102 is closed, and the rotating speed is reduced to 50 rpm/min.

(2) And (3) disinfection: opening a high-temperature steam pipeline, introducing 121-180 ℃, sterilizing and disinfecting by 3 kg of steam, and maintaining the stirring speed at 50rpm/min while introducing the steam so that the steam in the tank body is uniformly distributed. The ultrasonic sterilization device 105 on the inner wall of the upper side of the tank body can be opened to assist sterilization at the same time of steam sterilization. And (3) closing the steam pipeline after 30-50 min, discharging water condensed by the steam from the liquid outlets 102 at two sides of the bottom of the tank, closing the liquid outlets 102, and cooling the tank body to room temperature.

The operation and the technological parameters in the working process of the spraying system are completely controlled by a control system of a PLC (or a DCS, the PLC and the DCS), and the control system is connected with each sensor on the tank body 10, so that the automatic intelligent control is realized, and the labor cost is saved.

In the above embodiment, the number of the pump bodies is not specifically required, and the pump bodies may be arranged at corresponding positions as required.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spray system, comprising: a tank body; the middle area of the bottom surface of the tank body protrudes upwards to form a plane, liquid outlets are respectively arranged at the two side leveling parts of the protruding plane of the bottom surface of the tank body, and a liquid inlet is arranged on the side wall of the tank body;

2. The spray system of claim 1 wherein each of said spray openings has a mesh surface with a plurality of uniformly spaced pores therein.

3. The spray system of claim 1 wherein said liquid inlet is connected to said liquid injector bottom center location by a conduit.

4. The spraying system of claim 1, wherein the tank body is provided with a stirring paddle at the position of the upward bulge of the bottom to accelerate the discharge.

5. The spraying system of claim 4, wherein the number of the stirring paddles is two, and the stirring paddles are arranged side by side at the raised plane at the bottom of the tank body.

6. The spraying system of any one of claims 1 to 5 wherein an ultrasonic sterilization device is disposed within the tank, the ultrasonic sterilization device being in close proximity to an inner wall of the tank.

7. The spraying system of any one of claims 1 to 5, wherein the number of the liquid inlets is two, one of the liquid inlets is connected with the liquid ejector through a pipeline, and the other liquid inlet is arranged at a position close to the bottom of the tank body.