CN201609640U - Tail water body structure for guiding airflow to tangentially impact liquid level to form moist airflow - Google Patents

Abstract

The utility model relates to a hydrocyclone structure in the fields of liquefied natural gas heating and gasification, natural gas heating, dust removal, centralized air-conditioning systems and the like. A water swirl structure that guides the airflow to impact the liquid surface tangentially to form a wet airflow. A conical spout (4) communicating with the vertically downward airflow inlet pipe (2) is arranged in the container (3). The spout (4) ) is liquid (6) below, and the lower part of the inverted umbrella-shaped airflow vortex (5) is submerged in the liquid (6), forming a channel between the inner wall of the container (3) and the outer wall of the air inlet pipe (2) and the spout (4) On the top, the airflow outlet (1) is drawn out; the middle of the airflow swirl (5) is an upwardly protruding spire (5a), and then extends from the spire to the edge in a certain curved shape, first down to the edge and then slightly upward. Arc-shaped curved surface (5c); the horizontal projection of the outer circle of the air-flow cyclone (5) is consistent with the horizontal cross-sectional shape of the spout (4), which is circular or polygonal. The utility model has a simple structure and no moving parts, and is suitable for various functions such as enhanced heat transfer, dust removal, humidification and purification, and improves thermal efficiency and dust removal efficiency.

Description

A hydrocyclone structure that guides the airflow to hit the liquid surface tangentially to form a wet airflow

technical field

The utility model is a water swirl structure used in the fields of liquefied natural gas heating and gasification, natural gas heating, dust removal, and centralized air-conditioning systems, and specifically relates to guiding high-speed airflow tangentially impacting the liquid surface to form a wet vortex airflow It can perform functions such as heating, dust removal, humidification and purification.

Background technique

Energy conservation and emission reduction is a top priority in today's world, and our country also attaches great importance to it as a basic national policy.

1. In terms of energy saving, improving the thermal efficiency of various heat exchange devices is one of the key technologies. Liquefied natural gas heating gasifier and natural gas heating furnace are widely used heating devices in the natural gas industry. Today, natural gas is increasingly valued as a clean energy source. Improving the thermal efficiency of such devices is an urgent problem to be solved. Natural gas liquefaction can greatly save storage and transportation space and cost, which is its advantage. However, when in use, it still needs to be heated and gasified into natural gas at the pressure and temperature required by the process before it can be used in engineering. Therefore, liquefied natural gas supply In the system, there must be heating gasification equipment, the main device of which is the liquefied natural gas heating gasifier. The existing small and medium-sized heating gasification devices include water heating type gasification device, submerged combustion heating type gasification device, air heating type gasification device, intermediate heat transfer medium type gasification device, steam heating type gasification device, etc. The several LNG gasification heating devices mentioned above have their own characteristics, advantages and disadvantages, and are also suitable for some occasions. However, they generally adopt conventional heating and heat transfer components, structures and devices of conventional concepts. The thermal effect is not ideal. The air-heated gasification device is greatly affected by the environmental conditions, and the gasification capacity will be greatly affected in low-temperature climates; the steam-heated gasification device requires a steam source, which increases the operating cost, etc. . Today, the pursuit of high efficiency and energy saving is advocated all over the world. This field hopes to have a new technology of heating and gasification working part structure with simple structure, low investment and high thermal efficiency.

2. As far as emission reduction is concerned, industrial dust and waste gas are one of the main pollution sources affecting the quality of my country's air environment, and it is imperative to control and control the emission of smoke and dust. Elimination of solid particles and harmful components in the exhaust gas stream, such as oil mist, dioxin, phenol, sulfur oxides, nitrogen oxides, etc., is one of the key technologies for environmental pollution control. The dust removal device is a device for dust removal treatment of exhaust gas discharged from various operations such as boilers, medicine copying machines, casting workshops, brick kilns, wood processing, central air conditioning, range hoods, etc. Commonly used dust removal devices include cyclone dust collectors and bag dust collectors. These dust removal devices have their own characteristics, advantages and disadvantages, and are also suitable for some occasions. However, due to the different shapes and sizes of dust particles, such as: in wood processing The generated dust such as small pieces of wood, shavings, and wood chips has a large difference in mass and weight. For this mixed dust, only using a cyclone separator or a bag filter cannot solve the dust removal problem well, and the dust removal efficiency is low; another example: When removing dust from the flue gas produced by boilers and brick kilns, due to the high temperature of the flue gas, the general dust collector is not suitable, and the water film dust removal method is usually used, but due to the large resistance of the water film dust removal device, the induced draft fan The power of the motor increases, the power consumption is large, and the energy saving is affected due to the low dust removal efficiency and high energy consumption of the dust removal device. At present, the whole world attaches great importance to energy saving, emission reduction and environmental protection. Therefore, it is hoped that there will be dust removal devices with various structures, different dust removal technologies, compact structure, high dust removal efficiency and low investment in this field.

Combining the existing technologies in the fields of liquefied natural gas heating and gasification, natural gas heating, dust removal, and centralized air conditioning systems, it is very necessary to propose a new technology of water spin structure to complete the functions of heating, dust removal, humidification and purification. Using this spin The water structure can control the temperature and humidity of the airflow, heat the low-temperature liquid gas in the pipeline, perform efficient adsorption and dedusting of dust, and purify and humidify the circulating airflow in the centralized air conditioning system.

Utility model content

The purpose of this utility model is to provide a water swirl structure that guides high-speed airflow tangentially impacting the liquid surface to form a wet vortex airflow, and completes functions such as enhanced heat transfer, dust removal, harmful substances removal, humidification and purification in the process, Suitable for liquefied natural gas and natural gas heating and other occasions that need to control the smoke temperature, suitable for capturing small particles of dust, high dust removal efficiency, and low energy consumption.

The purpose of this utility model is achieved by the following structure:

A hydrocyclone structure that guides the airflow to impact the liquid surface tangentially to generate a wet airflow, characterized in that: a conical spout connected to the vertically downward airflow inlet pipe is set in the container, and the liquid below the spout is inverted The lower part of the umbrella-shaped airflow spinner is immersed in the liquid surface of the liquid, and an airflow outlet is drawn on the channel formed between the inner wall of the container, the air inlet pipe and the outer wall of the spout;

The middle of the airflow swirling water is an upwardly protruding spire, and then an arc-shaped surface extending from the apex to the edge in a certain curved shape, first going down to the edge and then slightly upward;

The horizontal projection of the outer ring of the airflow swirling water is consistent with the shape of the horizontal section of the spout, which is circular or polygonal.

Further, the nozzle is a tapered nozzle.

Still further, the nozzle is a conical tapered nozzle or a rectangular slit tapered nozzle.

Further, the distance between the nozzle and the apex of the airflow swirl is within ±10% of the distance L from the nozzle to the tip of the jet core of the airflow at the nozzle.

Further, the horizontal projection of the outer circle of the air-cyclone water sub-circle and the horizontal cross-sectional shape of the nozzle are circular or polygonal.

Further, the cross-section of the container is consistent with the horizontal projection of the outer ring of the airflow cyclone and the shape of the horizontal cross-section of the nozzle.

Further, a number of small holes are opened at the lowest point of the curved surface of the airflow water element.

Further, the curves on which the airflow subsurface is based are arc curves such as parabolas, arcs, and hyperbolas.

Further, the velocity of the airflow ejected from the nozzle should be greater than 20m/s.

Further, the liquid is water.

Adopting the technical scheme of the utility model, including the structure of the airflow cyclone technology, when the airflow hits the airflow cyclone downwards, under the guidance of the arc-shaped curved surface, an upwardly rolled airflow is formed, and the splashed droplets are entrained to form Air flow mixed with water mist (and steam when used in high-temperature air) is a mixed and rolled moist air flow. When used in a heating device, the wet air flow not only enhances heat transfer and improves the thermal efficiency of the device, but also controls the temperature of the smoke to ensure liquefaction The safety of the heating and gasification process of low-temperature liquids such as natural gas; when used for dust removal, the liquid droplets and mist are continuously combined with the dust particles and returned to the liquid, and the liquid film on the surface of the water spinner is also constantly capturing dust, and finally the dust particles and harmful substances are washed away Entering the pool, the clean air is discharged upwards to achieve the purpose of dust removal.

The utility model guides the high-speed airflow to evenly impact on the water spinner partly placed in the liquid, and flows quickly along the curved surface of the water spinner to impact the liquid surface tangentially, splashing liquid droplets and water mist. Under the guidance of the guide, an upwardly rolled airflow is formed and liquid droplets and water mist are entrained to become a humid airflow. In this process, functions such as enhanced heat transfer, dust removal, harmful gas removal, humidification and purification are completed.

Beneficial effects of the utility model: the utility model has the advantages of simple and compact structure, small footprint, low equipment and operating costs, no moving parts, low initial investment, convenient operation and maintenance, and can effectively improve the thermal efficiency of the heating device, effectively To improve the dust removal efficiency, if the corresponding cleaning agents are added to the components contained in various exhaust gases, the harmful substances in the exhaust gases can be removed more effectively, and the exhaust gases will be fresher and cleaner, meeting the emission standards.

The water spin structure is suitable for many purposes, especially for liquefied natural gas heating gasification furnaces, natural gas heating furnaces and other small and medium-sized heating gasification devices to enhance heat transfer and improve thermal efficiency; it is especially suitable for flue gas dust removal and purification, oil fume Air purification, woodworking dust removal and other exhaust gas purification occasions to ensure that the exhaust gas meets the emission standards; it is especially suitable for improving the air quality of the central air-conditioning system, purifying and humidifying, so as to create a clean and comfortable working and living environment, etc.

Description of drawings:

Fig. 1 is a general configuration structure diagram of an embodiment of a hydrocyclone structure that guides the air flow to impact the liquid surface tangentially to form a wet air flow in the present invention;

Fig. 2 is a kind of implementation mode of the hydrocyclone structure that guides the airflow to impact the liquid surface tangentially to form the wet airflow of the utility model. ;

Fig. 3 is a kind of implementation mode of the hydrocyclone structure that guides the airflow to impact the liquid surface tangentially to form the wet airflow of the utility model. ;

Fig. 4 is a schematic diagram of the jet core top distance L from the nozzle to the nozzle airflow;

Fig. 5 is an embodiment of a hydrocyclone structure for guiding the airflow to impact the liquid surface tangentially to form a wet airflow according to the present invention. The cross-section of the container, the airflow hydrocyclone and the shape of the spout are rectangular, as shown in the B-B direction view of Fig. 1;

Fig. 6 is an embodiment of a hydrocyclone structure that guides the airflow to impact the liquid surface tangentially to form a wet airflow according to the present invention. The cross-section of the container, the airflow hydrocyclone and the shape of the spout are rectangular, as shown in the A-A direction of Fig. 1;

Fig. 7 is an embodiment of the present utility model, wherein the structure diagram of the air cyclone water sub-component.

In the picture:

1 is the outlet of the purified air flow, 2 is the air intake pipe, 3 is the container, 4 is the nozzle, 5 is the air flow swirling water, 5a is the spire, 5b is the small hole, 5c is the curved surface, 6 is the liquid, L is the airflow from the nozzle to the nozzle Jet core tip distance.

Detailed ways:

Below in conjunction with accompanying drawing, further describe the structure of the present utility model in detail.

A water-swirling sub-structure that guides the airflow to hit the liquid surface tangentially to form a wet airflow. In the container 3, a conical nozzle 4 communicated with the air inlet pipe 2 that is vertically downward is provided. The liquid 6 is below the nozzle 4, which is The lower part of the inverted umbrella-shaped airflow vortex 5 is submerged in the liquid level of the liquid 6, and an airflow outlet 1 is drawn out on the passage between the inner wall of the container 3, the air inlet pipe and the outer wall of the spout 4; the middle of the airflow vortex 5 For upward protruding spire 5a, then be the arc-shaped surface 5c that extends from spire 5a to the edge with a certain curve shape first down to the edge and then slightly upwards; 4 The shape of the horizontal section is consistent, which is circular or polygonal. When the airflow hits the airflow cyclone 5 downward, under the guidance of the curved surface 5c of the cyclone 5, an upwardly rolled airflow is formed, and the splashed droplets and mist are entrained to form a mixed and rolled up wet airflow. When used in a heating device, the wet gas flow not only enhances heat transfer and improves the thermal efficiency of the device, but also controls the temperature of the smoke to ensure the safety of the heating and gasification process of low-temperature liquids such as liquefied natural gas; when used for dust removal, liquid droplets, mist Continuously combined with dust particles and returned to the liquid, the liquid film on the surface of the airflow cyclone 5 also continuously catches dust, and finally washes the dust particles and harmful substances into the pool, and the clean air flow is discharged upwards for dust removal.

The nozzle 4 is a conical tapering nozzle. Such a structure can achieve better injection pressure and flow rate, which is beneficial to the airflow sprayed on the airflow cyclone 5 and rolled up, and entrained liquid droplets and mist to form a wet airflow.

The spout 4 is a conical tapered spout or a rectangular slit tapered spout, and the more commonly used ones are circular and rectangular spouts.

The distance between the spout 4 and the apex of the airflow swirl 5 is within ±10% of the distance L of the jet core top of the spout to the airflow of the spout. The ability to impact the liquid surface to splash and entrain liquid droplets and mist, thereby improving heat transfer efficiency and dust removal effect.

The horizontal projection of the 5 outer rings of the air-flow swirling water and the horizontal cross-sectional shape of the spout 4 are rectangular, and with the rectangular shape of the spout 4, the horizontal projection of the 5 outer rings of the air-flow swirling water is also a rectangle, that is, by the left and right pieces according to a certain The curved surface is formed by bending the curved shape, and there is a sharp top 5a in the middle. Such a structure can also achieve a good dust removal effect.

The horizontal section of the container 3 should be consistent with the horizontal projection of the outer ring of the airflow cyclone 5 and the horizontal section of the spout 4. In order to obtain better enhanced heat transfer or dust removal effect, the horizontal section of the container 3 strives to be consistent with the horizontal projection of the outer ring of the airflow cyclone 5 and the horizontal section shape of the spout 4; Shape also adopts the shape consistent with container 3 sections as far as possible.

A plurality of small holes 5b are provided at the lowest part of the curved curved surface of the airflow cyclone 5, and the small holes 5b can continuously replenish the liquid sucked away on the curved surface, so as to ensure that the curved surface at the lower part of the airflow cyclone 5 is always immersed in the liquid. The airflow flowing along the curved surface can always impact the liquid surface, resulting in tumbling, entrainment, splashing, crushing, swirling droplets and mist of the utility model, and achieves the effect of fully mixing to form a wet airflow without completely relying on the swirling water from the airflow Water enters the outside of the upwardly curved edge of the 5, and with such a structure, it is easier to replenish the amount of immersion liquid on the curved surface of the air-flow swirling water 5.

The curved curved surface 5c of the airflow cyclone 5 is based on a curve such as a parabola, an arc, a hyperbola, etc. According to different process requirements, moisture content and different particle diameters, harmful component content, different liquid media and devices According to the processing technology, the different curves can be selected.

The speed of the airflow ejected from the nozzle 4 should be greater than 20m/s. Within such a range, better heat transfer enhancement or dust removal effects can be achieved.

The liquid 6 can be various liquids required by the process. If there is no special requirement, water is the first choice as the medium, which is convenient, cheap and has good effect.

The technical scheme of the utility model has been applied to the heating gasification furnace of liquefied natural gas in the laboratory. After testing, not only the thermal efficiency of the heating gasification furnace has been effectively improved, reaching more than 95%, but also the flue gas entering the heating tube bundle has been well controlled. temperature, so that the temperature difference between the inside and outside of the heating tube bundle meets the process requirements without damaging the tube wall, ensuring the safe operation of the heating furnace; According to the test, compared with the commonly used mechanical impact method and wet dust suction method, the technology of this utility model has better effect of dust suction and sticky dust, higher dust removal efficiency, and energy saving, so as to achieve the goal of energy saving and emission reduction; If the technical solution of the utility model is used to improve the central air-conditioning system, it can improve air quality, purify and humidify, and create a clean and comfortable working and living environment. Therefore, the utility model technology has wide application prospect.

Claims (9)

1. what a guiding airflow to impact liquid level in tangential direction formed moisture-containing airflow revolves the water minor structure, it is characterized in that: a conical nozzle (4) that is communicated with vertically downward air-flow air inlet pipe (2) is set in container (3), spout (4) below is liquid (6), be the air-flow of being inverted umbrella and revolve the liquid level that water (5) bottom is immersed in liquid (6), on the passage that forms between container (3) inwall and air inlet pipe (2) and spout (4) outer wall, draw an air stream outlet (1);

The centre that described air-flow revolves water (5) is for to upper process pinnacle (5a), then the arc-shaped curved surface (5c) that slightly is bent upwards again after earlier down to the edge with certain curve shape for being extended to the edge by pinnacle (5a);

The floor projection that described air-flow revolves water (5) outer ring is consistent with spout (4) horizontal cross sectional geometry, is circle or polygon.

2. revolve the water minor structure according to what the described guiding airflow to impact liquid level in tangential direction of claim 1 produced moisture-containing airflow, it is characterized in that described spout (4) is conical convergent spout or rectangular slot formula convergent spout.

3. revolve the water minor structure according to what the described guiding airflow to impact liquid level in tangential direction of claim 1 produced moisture-containing airflow, it is characterized in that described spout (4) and air-flow to revolve distance between the pinnacle of water (5) be spout to the jet core top of spout air-flow apart from (L) ± 10% in.

4. revolve the water minor structure according to what the described guiding airflow to impact liquid level in tangential direction of claim 1 produced moisture-containing airflow, it is characterized in that floor projection and spout (4) horizontal cross sectional geometry that described air-flow revolves water (5) outer ring are circle or polygon.

5. revolve the water minor structure according to what the described guiding airflow to impact liquid level in tangential direction of claim 1 produced moisture-containing airflow, it is characterized in that the cross section of described container (3) is consistent with floor projection and spout (4) horizontal cross sectional geometry that air-flow revolves water (5) outer ring.

6. revolve the water minor structure according to what the described guiding airflow to impact liquid level in tangential direction of claim 1 produced moisture-containing airflow, it is characterized in that the curved surface lowest part that revolves water (5) at described air-flow offers some apertures (5b).

7. revolve the water minor structure according to what the described guiding airflow to impact liquid level in tangential direction of claim 1 produced moisture-containing airflow, it is characterized in that the curve that described air-flow revolves the arc-shaped curved surface of water (5) (5c) foundation is parabola, circular arc or hyp arc curve.

8. revolve the water minor structure according to what the described guiding airflow to impact liquid level in tangential direction of claim 1 produced moisture-containing airflow, it is characterized in that described spout (4) ejection air velocity should be greater than 20m/s.

9. revolve the water minor structure according to what the described guiding airflow to impact liquid level in tangential direction of claim 1 produced moisture-containing airflow, it is characterized in that described liquid (6) is water.

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