CN219273070U - Gas-liquid contact device and reaction system - Google Patents

Abstract

The present utility model relates to a gas-liquid contacting device and a reaction system, the gas-liquid contacting device (200) comprising: a hollow cylindrical housing (210) having a first inlet (212) for introducing a liquid, a second inlet (214) for introducing a gas, and an air outlet (216), wherein the first inlet (212), the second inlet (214) are arranged opposite in the axial direction of the housing (210), and the air outlet (216) is arranged at a side wall of the housing (210) close to the second inlet (214); a conduit (230) introduced into the housing (210) through the second inlet, wherein a first free end (232) of the conduit (230) extending into the housing (210) is located adjacent the first inlet (212); a packing (250) disposed in the housing (210) and having an upper surface of the packing (250) spaced a predetermined distance from the gas outlet (216), wherein the packing is capable of allowing the gas and the liquid to pass therethrough.

Description

Gas-liquid contact device and reaction system

Technical Field

The present utility model relates to a gas-liquid contacting device and a reaction system.

Background

At present, the current time of the process, ¹⁴ c is produced by radiating aluminum nitride target material mainly through thermal neutrons in nuclear reactor to generate nitrogen in aluminum nitride ¹⁴ N(n,p) ¹⁴ C reaction to give ¹⁴ C, then under the action of oxidant ¹⁴ C to C ¹⁴ CO2 is released, and then the barium carbonate is obtained after the subsequent absorption by sodium hydroxide, precipitation by barium chloride salt, filtration, washing and drying ¹⁴ And C, product.

Is currently used for ¹⁴ The treatment method of the release of C from the target material may be classified into a dry method and a wet method based on the state of the extractant used. The dry method mainly adopts oxygen as an oxidant, and has the characteristics of rapidness and less radioactive waste. However, the current dry method is difficult to fully react due to the difficulty in fully contacting oxygen with the target material, so that the dry method is difficult to apply. Wet method adopts liquid oxidant or hydrolytic liquid to make the target material in the target material ¹⁴ C is released, the method can be operated in a large amount, and has the advantages of thorough target material reaction, ¹⁴ And C has the characteristic of higher extraction rate. However, a large amount of liquid oxidizer or hydrolysate is added in the wet method, so that the target material can react sufficiently, the amount of the added oxidizer or hydrolysate is usually far more than the amount of the target material, which greatly increases the amount of radioactive waste compared with the dry method, and meanwhile, the treatment of a large amount of radioactive waste liquid is more difficult than the treatment of radioactive solid waste (including collection, temporary storage, transportation, subsequent solidification and the like), thereby increasing the cost of subsequent waste treatment and not conforming to the environmental protection policy.

At the same time, in the opposite direction ¹⁴ CO ₂ Due to the absorption of (2) ¹⁴ CO ₂ The concentration in the carrier gas is extremely small (the volume ratio is generally about 1%), and absorption is usually performed by using a multistage absorption tower or an absorption bottle. The multistage absorption tower not only can increase the volume of absorption liquid, but also can increase radioactive waste liquidIs a volume of (c). In addition, higher pressure difference can be generated between the multistage absorption towers, so that the front carrier gas pressure is higher, the requirement on the whole reaction system is extremely high, the conditions of back suction, liquid mixing and the like caused by unstable pressure can be easily generated, and if the back suction prevention mechanism and the like are added, the treatment system is more complex.

Disclosure of Invention

The object of the present utility model is to propose a gas-liquid contacting device and a reaction system having such a gas-liquid contacting device, which at least partly avoid the above-mentioned drawbacks.

According to a first aspect of the present utility model, there is provided a gas-liquid contacting device comprising: a hollow cylindrical housing having a first inlet for introducing a liquid, a second inlet for introducing a gas, and a gas outlet, wherein the first inlet and the second inlet are oppositely arranged along an axial direction of the housing, and the gas outlet is arranged near the second inlet at a side wall of the housing; a conduit introduced into the housing through the second inlet, wherein a first free end of the conduit extending into the housing is adjacent the first inlet; a packing disposed in the housing with an upper surface of the packing spaced a predetermined distance from the gas outlet, wherein the packing is capable of allowing passage of gas and liquid.

According to an embodiment of the utility model, the catheter has a bulge in its section outside the housing.

According to an embodiment of the utility model, the filler consists of spherical or ellipsoidal particles.

According to an embodiment of the present utility model, a filler fixing portion is arranged above the filler.

According to an embodiment of the utility model, a filter is mounted at the first inlet.

According to an embodiment of the utility model, the first free end of the conduit is offset from the first inlet.

According to an embodiment of the utility model, the gas-liquid contacting device further has a temperature control unit arranged to enclose the housing of the gas-liquid contacting device in a circumferential direction.

According to an embodiment of the utility model, the temperature control unit is a tube furnace, a liquid circulation jacket or a heating jacket.

According to another aspect of the present utility model, a reaction system is presented, having at least one gas-liquid contacting device as described above.

According to an embodiment of the utility model, the reaction system further has a primary reaction device arranged upstream of the gas-liquid contacting device, the primary reaction device comprising: a housing having an inlet and an outlet for a fluid; a reaction unit disposed in the housing and including a holding body capable of allowing a fluid to flow therethrough and a pore layer held by the holding body, wherein, with reference to a mounting position of the reaction apparatus, the inlet is disposed below the outlet, and a filling degree of the pore layer to a space surrounded by the holding body is 10% -90%.

According to an embodiment of the utility model, the reaction system has a first gas-liquid contacting device, a second gas-liquid contacting device and a third gas-liquid contacting device, wherein a second free end portion of the conduit of the first gas-liquid contacting device opposite to the first free end portion is provided with a first three-way valve, and a second free end portion of the conduit of the second gas-liquid contacting device opposite to the first free end portion is provided with a second three-way valve, the gas outlet of the first gas-liquid contacting device is provided with a first valve, and the gas outlet of the third gas-liquid contacting device is provided with a second valve, the other two orifices of the first three-way valve are connected to the outlet of the primary reaction device and to the side of the first valve facing away from the first gas-liquid contacting device, respectively, by pipes, the other two orifices of the second three-way valve are connected to the first valve of the first gas-liquid contacting device and the side of the second valve facing away from the third gas-liquid contacting device, respectively, the gas outlet of the second gas-liquid contacting device communicates with the second free end portion of the conduit of the third gas-liquid contacting device opposite to the first free end portion.

According to an embodiment of the utility model, a cooling device is also arranged between the primary reaction device and the gas-liquid contacting device.

According to an embodiment of the utility model, a receiving device is arranged downstream of the cooling device in parallel with the gas-liquid contacting device.

According to an embodiment of the utility model, a plurality of receiving means are provided, which are connected in parallel to each other.

Through the gas-liquid contact device provided by the utility model, the filling material capable of allowing the gas and the liquid to flow through can ensure the sufficient contact of the gas and the liquid, enlarge the contact area of the gas and the liquid and prolong the contact time of the gas and the liquid, thereby realizing the sufficient reaction of the gas and the liquid and realizing the efficient utilization of the gas and the liquid participating in the reaction.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present utility model, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. It will be appreciated by persons skilled in the art that the drawings are intended to schematically illustrate preferred embodiments of the utility model, and that the scope of the utility model is not limited in any way by the drawings, and that the various components are not drawn to scale. The utility model is described below with the aid of the figures.

FIG. 1 schematically illustrates an embodiment of a reaction system according to the present utility model;

FIG. 2 schematically shows another embodiment of a reaction system according to the utility model;

FIG. 3 schematically illustrates an embodiment of a gas-liquid contacting device of a reaction system according to the present utility model; and

fig. 4 schematically shows another embodiment of a gas-liquid contacting device of a reaction system according to the utility model.

Detailed Description

The utility model will be described in further detail with reference to the accompanying drawings. The following description is illustrative and not limiting of the utility model. Other ways of implementing the utility model will occur to those skilled in the art on the basis of preferred embodiments and are intended to fall within the scope of the utility model.

Furthermore, the terms first, second, and the like in the description are used for descriptive purposes only and not for limiting the size, number, or other order of the objects described. Directional terms refer to an orientation or positional relationship based on that shown in the drawings for the purpose of describing the present application only, and do not indicate or imply that the subject in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

The reaction system according to the present utility model may comprise a primary reaction device 100 and a gas-liquid contacting device 200 arranged downstream of the primary reaction device.

Referring to fig. 1, the primary reaction apparatus 100 may include: a housing 110 having an inlet 112 and an outlet 114 for a fluid; a reaction unit 102 disposed in the housing 110 and including a holding body 120 capable of allowing a fluid to flow therethrough and a pore layer 130 held by the holding body 120, wherein, with reference to an installation position of the reaction apparatus 100, the inlet 112 is disposed below the outlet 114, and a degree of filling of the pore layer 130 into a space surrounded by the holding body 120 is 10% -90%.

Referring to fig. 3 and 4, the gas-liquid contacting device 200 may include: a hollow cylindrical housing 210 having a first inlet 212 for introducing liquid, a second inlet 214 for introducing gas, and an air outlet 216, wherein the first inlet 212, the second inlet 214 are oppositely arranged along an axial direction of the housing 210, and the air outlet 216 is arranged near the second inlet 214 at a side wall of the housing 210; a conduit 230, the conduit 230 being introduced into the housing 210 through the second inlet, wherein a first free end 232 of the conduit 230 extending into the housing 210 is located adjacent the first inlet 212, the conduit 230 further having a second free end 234 opposite the first free end 232; a packing 250 disposed in the housing 210 with an upper surface of the packing 250 spaced a predetermined distance from the gas outlet 216, wherein the packing is capable of allowing gas and liquid to pass therethrough.

Fig. 1 schematically shows an embodiment of a reaction system according to the utility model. The reaction system has a primary reaction device 100 and a first gas-liquid contacting device 200A, a second gas-liquid contacting device 200B and a third gas-liquid contacting device 200C arranged downstream of the primary reaction device, which are in communication with each other via a piping system 300. In this example, the first gas-liquid contacting device 200A, the second gas-liquid contacting device 200B, and the third gas-liquid contacting device 200C have the same configuration, as shown in fig. 4.

In the reaction system shown in fig. 1, the second free end 234A of the conduit of the first gas-liquid contacting device 200A is assigned a first three-way valve 5', i.e. the second free end 234A is connected to one orifice of the first three-way valve 5' by a conduit 304A; the second free end 234B of the conduit of the second gas-liquid contacting device 200B is assigned a second three-way valve 5", i.e. the second free end 234B is connected to one orifice of the second three-way valve 5" by a conduit 304B; the gas outlet 216A of the first gas-liquid contacting device 200A is assigned a first valve 6', and the gas outlet of the third gas-liquid contacting device 200C is assigned a second valve 6"; the other two orifices of the first three-way valve 5' are connected to the outlet 114 of the primary reaction device 100 and the side of the first valve 6' facing away from the first gas-liquid contacting device 200A by means of the lines 302, 306, respectively, and the other two orifices of the second three-way valve 5 "are connected to the first valve 6' of the first gas-liquid contacting device 200B and the side of the second valve 6" facing away from the third gas-liquid contacting device 200C by means of the lines 308A, 310, respectively; the gas outlet 216B of the second gas-liquid contacting device 200B communicates with the second free end 234C of the conduit of the third gas-liquid contacting device 200C via line 308B. In this reaction system, the gas may exit through a conduit 308C connected to the gas outlet 216C of the third gas-liquid contacting device 200C.

Different liquids may be filled in the first gas-liquid contacting device 200A, the second gas-liquid contacting device 200B, and the third gas-liquid contacting device 200C through the valve 7, respectively, to achieve a desired function. Another reaction fluid, such as a gas, may be fed into the primary reaction device 100 by opening the valve 2.

Another embodiment of a reaction system according to the utility model is schematically shown in fig. 2. The reaction system likewise has a primary reaction device 100 and a further gas-liquid contacting device, namely a fourth gas-liquid contacting device 200D, arranged downstream of the primary reaction device, wherein a cooling device 400 is also arranged between the primary reaction device 100 and the fourth gas-liquid contacting device 200D. The configuration of the cooling device 400 is substantially the same as that of the fourth gas-liquid contacting device 200D, except that no filler is placed in advance in the cooling device 400.

As shown in fig. 2, a receiving device connected in parallel with the fourth gas-liquid contacting device 200D, that is, the fourth gas-liquid contacting device 200D and the receiving device are connected to the output port 416 of the fourth gas-liquid contacting device 200D in parallel with each other, is arranged downstream of the cooling device 400. Here, two receiving devices 502, 504 are schematically shown, which are connected in parallel to each other. It is to be noted that other numbers of receiving means may be provided here as required.

In the reaction system shown in fig. 2, the second free end 434 of the cooling device 400 is provided with a valve 3, to which valve 3 the outlet 114 of the primary reaction device 100 is connected via a line 302. Furthermore, a valve 9 is provided in the conduit 316 connecting the output port 416 of the cooling device 400 and the second free end 234D of the fourth gas-liquid contacting device 200D; in the line 318 provided with the receiving means 502, 504, a valve 6 and a valve 10 are provided upstream and downstream of the whole constituted by the receiving means 502, 504, respectively. Each receiving means 502, 504 may be assigned a valve 8, respectively, which is arranged in the line 320, 322 connecting the receiving means 502, 504 and the line 318. The cooling device 400 and the fourth gas-liquid contacting device 200D may be supplied through the opened valve 7.

The primary reaction device and the gas-liquid contacting device used in the reaction system according to the present utility model are further described below.

The primary reaction device (hereinafter referred to simply as reaction device) used in the reaction system according to the present utility model is applicable to other fluids, such as liquids, particularly low-viscosity liquids, in addition to gases. The gas may be a gas having a boiling point lower than room temperature, or may be steam in an atmospheric pressure or vacuum state, so long as it does not undesirably condense when passing through the reaction apparatus. The reaction device according to the present utility model can be operated under normal pressure or under negative pressure or high pressure, and thus can be used for both normal temperature and low temperature or high temperature. The individual components constituting the reaction device should be made of a material that is inert with respect to the fluid.

It is to be noted here that, although a vertically arranged housing of the reaction device is shown in the figures, it is also possible for the housing to have a certain inclination, for example an inclination angle of the housing with respect to the vertical axis of no more than 45 °. Thus, "the inlet is arranged below the outlet" is understood to mean that the inlet is not only arranged directly below the outlet, but also that the inlet is arranged obliquely below the outlet.

The housing 110 of the reaction apparatus may be integrally formed or may be composed of a plurality of sections. The housing 110 may be made of, for example, stainless steel, aluminum, glass, quartz glass, ceramic, or any other suitable material.

To facilitate the introduction of fluid into the reaction device, the inlet and/or outlet of the housing may be assigned a plug 116, which may be used to seal the inlet and/or outlet, wherein a conduit 118 may be introduced into the plug, through which conduit 118 fluid may be introduced into the housing, and wherein the conduit 118 protruding into the housing protrudes a distance from the surface of the plug facing the interior space of the housing.

Alternatively, the inlet and/or outlet of the housing may also be assigned a cover, which may close the respective opening, for example by a screw connection, a snap connection or other suitable means, wherein the cover is provided with a passage for introducing fluid into the housing.

The reaction unit 102 of the reaction device is constructed in a sandwich structure, i.e. its pore layer 130 is arranged between the holders 120. The reaction unit 102 is held in place in the housing 110 via a support structure 140 provided at the housing. Of course, the reaction unit 102 may take other forms.

The support structure 140 of the reaction device may be integrally formed with the housing 110 or may be separately disposed at the housing 110.

For example, in case of being integrally formed with the housing, the support structure may be in the form of barbs, flange plates protruding radially from the inner wall of the housing towards the inside of the housing by a distance smaller than the radius of the housing, wherein the support structure may be evenly distributed along the inner wall of the housing in the circumferential direction or the support structure may encircle the inner wall of the housing.

For example, for a separately provided support structure, where the housing is made up of a plurality of sections connected to one another by flanged joints, the support structure may be embedded directly between adjacent sections of the housing, for which purpose the support structure may be configured in the form of a perforated screen, mesh plate or the like; the support structure may also be configured as a rod-like member inserted laterally into the housing, or a brace inserted from the inlet of the housing, the upper end of the brace supporting the bottom of the reaction unit.

The holder 120 of the reaction unit 102 is configured to be permeable to a fluid. The holder 120 may be made of, for example, cotton, wire (e.g., copper wire, stainless steel wire, etc.), glass, ceramic, etc. The retaining body 120 may be configured as a gasket, orifice plate, mesh, housing, or the like. The retainer should be constructed with a structural strength such that the retainer, when placed on the support structure 140, after the application of the pore layer 130 to the retainer 120, can hold the pore layer in a desired position in the housing 110 without the pore layer 130 falling off the retainer due to deformation of the retainer by the gravity of the pore layer 130.

For example, the upper first retaining body and the lower second retaining body may have different rigidities, in particular the lower retaining body has a rigidities that are greater than the rigidities of the upper retaining body. In an example, the lower holding body, i.e. the holding body facing the inlet, may be configured as a rigid body, while the upper holding body, i.e. the holding body facing the outlet, may be configured as a flexible body. The upper and lower retaining bodies may also have different thicknesses.

The porous layer 130 of the reaction device may be composed of particles or be a one-piece porous body that undergoes the desired reaction with the fluid. The void layer 130 fills the space enclosed by the retainer 120 by 10% -90%. It is to be noted that, although the void layer 130 is shown in the drawings to completely fill the space surrounded by the holding body 120, this is only a schematic illustration. If the degree of filling is too high, the fluid will not have a buffer space when passing through the pore layer and will easily clog. If the filling degree is too low, space is wasted, making the housing too large, and also reducing the reaction efficiency, so that a large amount of fluid is required.

In order to secure the above-described 10% -90% filling degree, the reaction unit may be provided with a spacer so as to maintain a predetermined interval between the holder 120 and the pore layer 130. Illustratively, the spacer may be a spacer block that is placed between the aperture layer 130 and the retainer 120 above the aperture layer 130.

Preferably, the height to diameter ratio of the pore layer 130 satisfies the following relationship: 0.2< H/phi <10, wherein H is the height of the pore layer and phi is the diameter of the pore layer. In general, the smaller the size of the particles constituting the pore layer, the smaller the height-to-diameter ratio at the time of filling, and the larger the size of the particles constituting the pore layer, the larger the height-to-diameter ratio at the time of filling. In the case where the above-described relationship is satisfied, the normal flow of the fluid can be achieved within the allowable differential pressure range.

In one example, the thickness of the flexible retention body is greater than 10mm.

In one example, the thickness of the aperture layer 130 is no more than 20mm.

Alternatively, the reaction unit of the reaction device may also be arranged in other ways.

In a variant, the reaction unit 102 is arranged near the outlet. Such a reaction apparatus is particularly suitable for cases where the fluid needs to be pre-treated prior to the reaction, such as preheating or thorough mixing of the various components that make up the fluid. In addition, the reaction device is also suitable for the situation that the fluid flow is large, because enough buffer space is reserved in the reaction device to prevent the fluid pressure from being excessive, and the outlet at the top can prevent the flowing large-flow fluid from driving the upper retaining body to move upwards.

In a variant, the reaction unit 102 is arranged near the inlet. Such a reaction unit is suitable for situations where the pressure resistance is high after the fluid has been discharged, which is advantageous for pressure control, since the space in the upper layer can be used for pressure buffering.

In a variant, a plurality of reaction units 102 are provided, which are arranged spaced apart from one another, which is particularly suitable for high flow rates or other situations in which a buffer layer is required. For example, three reaction units 102 may be disposed at the inlet, middle, and outlet of the housing, respectively, or two reaction units 102 may be disposed at a spaced apart relationship in the middle of the housing. Where it is desired to absorb small amounts of impurities in the fluid or where it is difficult to react sufficiently with components in the fluid using a single reaction unit, multiple reaction units may be provided to achieve the desired reaction of the fluid with the pore layer. Alternatively, when it is desired to purify the fluid using different solids, a multi-layer structure may be employed, for example, when it is desired to remove a small amount of acid or water contained in the gas, it is difficult to completely remove them by a single reaction unit, and for this purpose, two reaction units may be provided, such as placing a solid base on the lower part to adsorb the acid and placing a drying agent such as phosphorus pentoxide on the upper part to remove the water. Thus, in this embodiment, the pore layers in the respective reaction units may contain different components.

In a variant, a plurality of reaction units may be stacked directly. This applies to situations where the fluid flow rate is low or where it is desired to reduce the space within the housing. Here, adjacent reaction units may share one holder 120, that is, the holder may serve as an upper holder of a reaction unit located below, while serving as a lower holder of a reaction unit located above.

The reaction apparatus may further have a temperature control unit 150 therein, the temperature control unit 150 being arranged to surround the housing 110 of the reaction apparatus 100 in the circumferential direction. The temperature control unit 150 may be arranged to surround the entire length of the entire housing, or only a portion of the length of the housing, which may be determined according to actual needs. The temperature control unit 150 may be used to heat or cool the interior of the housing to a desired temperature level. Illustratively, the temperature control unit 150 is a tube furnace, a double jacket circulating fluid, or a heating jacket.

As can be seen from the figures, the conduit 230 of the gas-liquid contacting device has a bulge 236 in its section outside the housing 210, which may be hollow spherical, for example, for gas-intake buffering and for preventing suck-back of liquid. Preferably, the catheter with bulge 236 may be integrally formed. The conduit 230 may extend into the housing 210 through the sealing plug 220 sealing the inlet 214 of the housing 210. Alternatively, the inlet 214 of the housing may also be provided with a tetrafluoro or stainless steel ferrule fitting, a tetrafluoro or stainless steel threaded fitting, or the like, through which the conduit is fed into the housing.

The packing 250 disposed in the gas-liquid contacting device should be a packing that does not form a dead volume. Illustratively, the filler 250 may be comprised of spherical or ellipsoidal particles, such as glass beads, the size of the particles being related to the housing and the size of the gas flow. Of course, the filler may also be composed of other materials. It is noted that the filler should be composed of a material that is inert with respect to the gases and liquids involved in the reaction. The filler can increase the contact area of gas and liquid and prolong the reaction time of the gas and the liquid, thereby improving the reaction efficiency and reducing the consumption of the components participating in the reaction. In addition, the subsequent cleaning of the gas-liquid contact device is particularly simple due to the arrangement of the seasoning. Specifically, at the time of cleaning, after the cleaning liquid is charged, if necessary, other necessary materials are introduced, and the cleaning can be started.

Preferably, a packing fixing portion, such as a protrusion, or a sand core, or a quartz wool or the like, is disposed above the packing 250 to prevent the packing from entering into the outlet to cause clogging.

Preferably, a filter 240 is installed at the first inlet 212 of the gas-liquid contacting device to prevent clogging of the first inlet 212 due to packing.

Preferably, the first free end 232 of the conduit 230 is offset from the first inlet 212, in particular offset in a direction transverse to the axial direction of the housing, whereby liquid is prevented from directly entering the conduit 230 when liquid is introduced.

The gas-liquid contacting device 200 may also have a temperature control unit 260, the temperature control unit 260 being arranged to enclose the housing 210 of the gas-liquid contacting device 200 in a circumferential direction. The temperature control unit 150 is a tube furnace, a liquid circulation jacket, or a heating jacket. In fig. 4, a gas-liquid contacting device 200 is schematically shown with a temperature control unit 260 in the form of a liquid-type circulating jacket, the temperature control unit 260 having an inflow 262 and an outflow 264. The reaction temperature can be precisely controlled by the temperature control unit. The temperature control unit may be controlled manually, semi-automatically or automatically. Of course, the gas-liquid contacting device 200 is not necessary, as shown in FIG. 3.

An exemplary use of the reaction system according to the utility model is for the preparation of barium carbonate- ¹⁴ C. For this purpose, the inlet of the reaction device is connected to an air flow source and the outlet is connected to a subsequent treatment device, for example a purification column. The fluid may be oxygen, a mixture of oxygen and nitrogen dioxide or chlorine, wherein the oxidation reaction temperature can be reduced appropriately in the case of pure nitrogen dioxide; the pore layer is a granular target, for example, when the fluid is chlorine, the target may be aluminum nitride; the holder may be quartz wool. Illustratively, the thickness of the quartz wool may be greater than 10mm, with the specific thickness being selected based on the shell aperture and the degree of compaction of the quartz wool. The laying height of the target material on the quartz cotton is not more than 20mm. If the amount of target material to be treated is excessive, the quartz wool and the target material particles can be alternately laid again under the condition that the interval retaining member is placed on the target material when necessary, and the uppermost layer is ensured to be the quartz wool.

By vertically arranging the reaction device and allowing the gas flow to flow from the bottom directly to the top, the gas flow is enabled to agitate the target material at least to a certain extent when the gas flow flows through the target material, since the target material forming the pore layer does not completely fill the space formed by the quartz wool, thereby preventing undesired agglomeration of the target material during the reaction due to high temperature while satisfying sufficient contact of the gas flow with the target material. Compared with a horizontal reaction device, the reaction device can effectively avoid that air flow cannot directly contact with the target material at the bottom layer and can only react with the target material at the surface layer when flowing through the target material, so that the reaction efficiency can be improved through the reaction device, and a vibration device or a stirring device is not required to be additionally arranged, which is also beneficial to the operation safety of the device. Through setting up the quartz cotton layer that forms the retainer in the upper and lower both sides of target material, not only can prevent that target material granule from getting into to the bottom intake pipe in vertical device, but also can prevent that the air current is too big and with the target material sweeping in the export and lead to the export to block up. When the multilayer quartz cotton dispersing target material is arranged, the air flow can be more fully contacted with the target material, and meanwhile, caking is better prevented. The amount of target material can be adjusted according to the diameter and length of the shell. Furthermore, a large-scale processing of the target material can be achieved by the reaction device according to the utility model.

The gas leaving the reaction device may be fed to a downstream gas-liquid reaction device.

As in the reaction system shown in fig. 1, the gas-liquid reaction apparatus may be configured as a purification tower, a sodium hydroxide absorption tower, and a tail gas purification tower, respectively, to which an acidic potassium permanganate solution (dilute sulfuric acid+potassium permanganate saturated solution, if nitrogen dioxide is added to the oxidizing gas, a cooling tower, a carbon-free sodium hydroxide solution, and a sodium hydroxide solution are added to the front end of the purification tower). The above temperature control unit is provided for the purification tower, the absorption tower, and the exhaust gas purification tower to maintain the purification tower temperature in the first temperature range, and maintain the absorption tower and the exhaust gas purification tower temperatures in the second temperature range and the third temperature range, respectively, and maintain the temperatures until the oxidation reaction process is completed.

In the reaction system shown in fig. 2, the gas-liquid reaction apparatus is configured as an exhaust gas purifying column. The cooling device 400 is maintained within a predetermined temperature range by a temperature control unit. And adding sodium hydroxide absorption liquid into the tail gas purifying tower. After the vacuum treatment is completed, the reaction preparation process may be started.

It is noted that the reaction system according to the utility model and its composition (e.g. reaction apparatus and gas-liquid contacting apparatus) may also be used in other suitable applications.

It is to be noted that the features or feature combinations of the device according to the utility model described above and the features and feature combinations mentioned in the figures and/or only shown in the figures can be used not only in the respectively given combination, but also in other combinations or alone without departing from the scope of the utility model.

The present utility model has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the teachings of the utility model, and such variations and modifications are within the scope of the utility model.

Claims (14)

1. A gas-liquid contacting device (200), characterized in that the gas-liquid contacting device (200) comprises:

a hollow cylindrical housing (210) having a first inlet (212) for introducing a liquid, a second inlet (214) for introducing a gas, and an air outlet (216), wherein the first inlet (212), the second inlet (214) are arranged opposite in an axial direction of the housing (210), and the air outlet (216) is arranged at a side wall of the housing (210) close to the second inlet (214);

-a conduit (230) leading into the housing (210) through the second inlet, wherein a first free end (232) of the conduit (230) extending into the housing (210) is located in the vicinity of the first inlet (212);

a packing (250) disposed in the housing (210) and having an upper surface of the packing (250) spaced a predetermined distance from the gas outlet (216), wherein the packing is capable of allowing the gas and the liquid to pass therethrough.

2. The gas-liquid contacting device (200) according to claim 1, wherein the conduit (230) has a bulge (236) in a section thereof located outside the housing (210).

3. The gas-liquid contacting device (200) of claim 1, wherein the filler (250) is comprised of spherical or ellipsoidal particles.

4. A gas-liquid contacting device (200) according to any one of claims 1 to 3, wherein a packing fixing portion is arranged above the packing (250).

5. A gas-liquid contacting device (200) according to any one of claims 1 to 3, wherein a filter (240) is mounted at the first inlet (212).

6. A gas-liquid contacting device (200) according to any one of claims 1 to 3, wherein the first free end (232) of the conduit (230) is offset from the first inlet (212).

7. A gas-liquid contacting device (200) according to any one of claims 1-3, wherein the gas-liquid contacting device (200) further has a temperature control unit (260), the temperature control unit (260) being arranged to enclose the housing (210) of the gas-liquid contacting device (200) in a circumferential direction.

8. The gas-liquid contacting device (200) of claim 7, wherein the temperature control unit (260) is a tube furnace, a liquid circulation jacket, or a heating jacket.

9. Reaction system, characterized in that it has at least one gas-liquid contacting device according to any one of claims 1 to 8.

10. The reaction system of claim 9, further having a primary reaction device (100) arranged upstream of the gas-liquid contacting device, the primary reaction device (100) comprising:

a housing (110) having an inlet (112) and an outlet (114) for a fluid;

a reaction unit (102) which is arranged in the housing (110) and comprises a holding body (120) through which the fluid can flow and a pore layer (130) held by the holding body (120),

wherein, with reference to the installation position of the reaction device (100), the inlet (112) is arranged below the outlet (114), and the filling degree of the pore layer (130) to the space surrounded by the holding body (120) is 10% -90%.

11. The reaction system of claim 10, wherein the reaction system has a first gas-liquid contacting device (200A), a second gas-liquid contacting device (200B), and a third gas-liquid contacting device (200C), wherein,

a second free end portion of the conduit of the first gas-liquid contacting device (200A) opposite the first free end is provided with a first three-way valve (5'), and a second free end portion of the conduit of the second gas-liquid contacting device (200B) opposite the first free end is provided with a second three-way valve (5 "),

the gas outlet of the first gas-liquid contacting device (200A) is assigned a first valve (6'), and the gas outlet of the third gas-liquid contacting device (200C) is assigned a second valve (6 "),

two orifices of the first three-way valve (5 ') are respectively connected to an outlet (114) of the primary reaction device (100) and one side of the first valve (6') far away from the first gas-liquid contact device (200A) through pipelines,

two orifices of the second three-way valve (5 ') are connected to a first valve (6 ') of the first gas-liquid contacting device (200A) and to a side of the second valve (6 ') remote from the third gas-liquid contacting device (200C) respectively by means of a pipe,

the air outlet of the second gas-liquid contacting device (200B) communicates with a second free end of the conduit of the third gas-liquid contacting device (200C) opposite the first free end.

12. The reaction system according to claim 10, characterized in that a cooling device (400) is also arranged between the primary reaction device (100) and the gas-liquid contacting device.

13. Reaction system according to claim 12, characterized in that downstream of the cooling means (400) receiving means are arranged in parallel with the gas-liquid contacting means.

14. A reaction system according to claim 13, characterized in that a plurality of receiving means are provided, which are connected in parallel with each other.

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