CN216935419U - Baffling type moving bed gas-solid reaction device and hydrofluorination production system - Google Patents

Abstract

A baffled moving bed gas-solid reaction device and a hydrofluorination production system belong to the technical field of uranium conversion production. The utility model aims to improve the fluidity of the uranium dioxide powder in equipment so as to ensure that the uranium dioxide is fully contacted with hydrogen fluoride in tail gas of a uranium dioxide hydrofluorination process and reduce the generation rate of fluorine-containing wastes. The utility model comprises a bed body, a moving central shaft and a baffle plate, wherein a feed pipe and an air inlet pipe are arranged on the bed body, an air outlet pipe is arranged at the top of the bed body, a discharge hole is arranged at the bottom of the bed body, the moving central shaft is arranged in the bed body, and the baffle plate is arranged on the moving central shaft. The tail gas hydrogen fluoride recycling device has the advantages of ingenious structural design, compact structure, complete functions, convenience in installation and maintenance, capability of effectively recycling hydrogen fluoride in tail gas of a uranium oxide hydrogen fluoride process, and suitability for popularization and use.

Description

Baffling type moving bed gas-solid reaction device and hydrofluorination production system

Technical Field

The utility model relates to a gas-solid countercurrent contact reaction device and a hydrofluorination production system, belonging to the technical field of uranium conversion production equipment.

Background

In the field of uranium conversion production energy, in the production process of preparing uranium tetrafluoride by a uranium dioxide hydrofluorination method, hydrogen fluoride excess measures are taken to improve the utilization rate of metal uranium. An important index for checking the quality of hydrofluorination (hydrofluorination refers to the process of generating uranium tetrafluoride by reacting uranium dioxide with anhydrous hydrogen fluoride) process and equipment is as follows: the method can obtain high-quality uranium tetrafluoride products at high yield and fully utilize hydrogen fluoride.

At present, the uranium tetrafluoride is prepared by adopting a two-stage series full-countercurrent fluidized bed system in China, the activity of a uranium dioxide raw material prepared by UNH is poor, and the excess amount of HF is higher in the hydrofluorination process and is as high as 20% on average. The existing treatment of hydrogen fluoride in uranium dioxide hydrofluorination is usually carried out by a recovery device, and no reactor is used for absorbing HF in hydrofluorination process tail gas, so that in view of environmental protection and economic requirements, excess HF is required to be recovered and reused.

Traditional moving bed reactor exists the material and can not evenly descend to move, especially to the relatively poor powder material of mobility, consequently when the realization is retrieved surplus HF, because traditional moving bed function singleness, the mobility of uranium dioxide material in traditional moving bed is poor, leads to the uranium dioxide can not fully absorb surplus HF.

Therefore, a gas-solid countercurrent contact reaction device needs to be designed, the retention time of uranium dioxide in the reaction device and the gas-solid contact area are prolonged as far as possible, and the excess HF of hydrofluorination can be directly recycled, so that the HF content in tail gas of the hydrofluorination process is obviously reduced, the utilization rate of hydrogen fluoride is improved, and the generation rate of fluorine-containing waste in the uranium tetrafluoride preparation process is reduced from the source.

SUMMERY OF THE UTILITY MODEL

The utility model aims to improve the fluidity of the uranium dioxide powder in equipment, so that the uranium dioxide is fully contacted with hydrogen fluoride in tail gas of a uranium dioxide hydrofluorination process, and the generation rate of fluorine-containing wastes is reduced. The following presents a simplified summary of the utility model in order to provide a basic understanding of some aspects of the utility model. It should be understood that this summary is not an exhaustive overview of the utility model. It is not intended to determine the key or important part of the present invention, nor is it intended to limit the scope of the present invention.

The technical scheme of the utility model is as follows:

a baffled moving bed gas-solid reaction device comprises a bed body, a moving central shaft and a baffle plate, wherein the bed body is provided with a feed pipe and an air inlet pipe, the top of the bed body is provided with an air outlet pipe, the bottom of the bed body is provided with a discharge hole, the moving central shaft is arranged in the bed body, and the baffle plate is arranged on the moving central shaft.

Preferably: the inlet pipe and intake pipe are all installed on the lateral wall of the bed body, and the inlet pipe is arranged on the upper portion of the bed body, the intake-tube is arranged in the lower part of the bed body.

Preferably: an upper cover is installed at the top of the bed body, and the upper end of the moving central shaft penetrates out of the upper cover and is connected with a vibration mechanism.

Preferably, the following components: the vibration mechanism comprises a motor, a cam and a transmission rod, the cam is mounted on an output shaft of the motor, the transmission rod is connected to a fulcrum, one end of the transmission rod is in mounting relation with the cam, and the other end of the transmission rod is in mounting relation with the moving central shaft.

Preferably, the following components: still include the extension spring, the one end and the removal center pin of extension spring are connected, and the other end of extension spring is fixed.

Preferably, the following components: the baffle plate comprises an inner ring plate and an outer ring plate, and the inner ring plate and the outer ring plate are arranged on the moving central shaft in an inclined mode.

Preferably: 15-25 stages of baffle plates are arranged in the bed body, and any baffle plate comprises a pair of inner ring plates and outer ring plates.

Preferably: the inner ring plate and the outer ring plate are arranged on the moving central shaft in an inclined angle of 5-15 degrees, the inner ring plate is inclined downwards along the horizontal direction, and the outer ring plate is inclined upwards along the horizontal direction.

Preferably: the center position of upper cover is fixed with the sealed storehouse, and the removal center pin is worn out the sealed storehouse, and the sealed packing is filled in the clearance that sealed storehouse and removal center pin constitute, and the sealed storehouse upper end realizes compressing tightly of sealed packing through gland.

Preferably: an external heater is arranged outside the bed body.

Preferably, the following components: and a distance tube is sleeved outside the moving central shaft, and the inner ring plate and the outer ring plate are positioned through the distance tube.

The second technical scheme of the utility model is as follows:

the hydrofluorination production system comprises the baffling type moving bed gas-solid reaction device in the scheme I, and the baffling type moving bed gas-solid reaction device is arranged at the tail gas end of the hydrofluorination production system.

The utility model has the following beneficial effects:

the utility model provides a baffling type moving bed gas-solid reaction device, which has the following beneficial effects:

1. the gas enters from the bottom, and the material enters from the upper part, so that gas-solid countercurrent contact is carried out, and good heat and mass transfer effects are realized;

2. the baffle plate is internally and externally annular plate, and the inner and outer annular plates are in one stage; the downward inclination angle of the inner ring plate is 10 degrees along the horizontal direction, and the upward inclination angle of the outer ring plate is 10 degrees along the horizontal direction; the inner and outer ring plates are fixed on the central shaft, and the inner and outer ring plates are positioned by distance pipes. The structure increases the retention time of materials in the reactor, and the design of the distance pipes ensures that the baffle plates are not easy to deform. The inclination angle of 10 degrees is equal to the numerical value of the material stacking angle, so that the material is prevented from falling unsmoothly.

3. The 20-stage baffle plate is arranged in the reaction kettle, the moving central shaft drives the baffle plate connected to the reaction kettle to vibrate, materials jump and fall step by step, the frequency is 10-60 times/min, the amplitude is 20-30mm, the mass and heat transfer effects are enhanced, the reaction time is effectively prolonged, the vibration design of the frequency can be adjusted, and the reaction kettle is suitable for reaction of most materials with poor flowability.

4. The baffling type moving bed is externally provided with an upper section heater and a lower section heater, and the temperature control is simple.

5. The device is connected to a hydrofluorination (uranium dioxide and HF react to prepare uranium tetrafluoride) production system, uranium dioxide is used in the device to react with production system tail gas containing about 30% of HF, the HF adsorption efficiency reaches over 90%, and the HF excessive in hydrofluorination is directly recycled, so that the HF content in hydrofluorination process tail gas is obviously reduced, and the device has high environmental protection benefit and economic value.

6. The device is suitable for material reaction with poor fluidity.

7. The tail gas hydrogen fluoride recycling device has the advantages of ingenious structural design, compact structure, complete functions, convenience in installation and maintenance, capability of effectively recycling hydrogen fluoride in tail gas of a uranium oxide hydrogen fluoride process, and suitability for popularization and use.

Drawings

FIG. 1 is a schematic structural view of a baffled moving bed gas-solid reaction device;

FIG. 2 is a view showing the fitting relationship between the vibration mechanism and the moving center shaft;

FIG. 3 is an enlarged schematic view at A in FIG. 1;

FIG. 4 is a schematic diagram of a ninth embodiment;

FIG. 5 is a schematic diagram of an eighth embodiment;

FIG. 6 is a schematic view of the installation position of the guide ring in the bed body;

fig. 7 is a sectional view taken along line a-a in fig. 6.

In the figure, 1-bed body, 2-moving central shaft, 3-baffle plate, 4-feeding pipe, 5-feeding pipe, 6-discharging pipe, 7-discharging port, 8-upper cover, 9-vibrating mechanism, 10-motor, 11-cam, 12-transmission rod, 13-tension spring, 14-inner ring plate, 15-outer ring plate, 16-sealed cabin, 17-sealed gland, 19-distance pipe, 20-external heater, 21-upper temperature measuring sleeve, 22-lower temperature measuring sleeve, 23-base plate, 24-positioning hole, 25-locking nut, 26-cone, 27-guide ring, 28-feeding port, and 29-nitrogen inlet.

Detailed Description

In order that the objects, aspects and advantages of the utility model will become more apparent, the utility model will be described by way of example only, and with reference to the accompanying drawings. It is to be understood that this description is made only by way of example and not as a limitation on the scope of the utility model. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The connection mentioned in the present invention is divided into a fixed connection and a detachable connection, the fixed connection (i.e. the non-detachable connection) includes but is not limited to a folding connection, a rivet connection, an adhesive connection, a welding connection, and other conventional fixed connection manners, the detachable connection includes but is not limited to a screw connection, a snap connection, a pin connection, a hinge connection, and other conventional detachable manners, when the specific connection manner is not clearly defined, the default is to always find at least one connection manner among the existing connection manners to achieve the function, and a person skilled in the art can select the connection manner as required. For example: the fixed connection selects welded connection, and the detachable connection selects hinged connection.

Example 1:

referring to fig. 1, the present embodiment provides a baffled moving bed gas-solid reaction apparatus, including a bed body 1, a moving central shaft 2 and a baffle plate 3, where the bed body 1 has a feeding pipe 4 and an intake pipe 5, the top of the bed body 1 has an outlet pipe 6, the bottom of the bed body 1 has a discharge port 7, the moving central shaft 2 is disposed in the bed body 1, and the baffle plate 3 is disposed on the moving central shaft 2.

The bed body 1 is a vertical chamber, and the bed body 1 is round, square, rectangular, rhombic and the like;

bed body 1 is a cylindrical cavity in this embodiment, its outward appearance is cylindrical, inlet pipe 4 and intake pipe 5 have on bed body 1, intake pipe 5 is in the below of inlet pipe 4, move center pin 2 and be straight reciprocating motion in bed body 1, and then realize the vibration action, uranium dioxide solid powder material enters into in the cavity from inlet pipe 4, fall on the baffling board 3 of vibration, whereabouts step by step, contact with the reaction gas adverse current that 1 lower part intake pipe 5 of bed body got into, material after the reaction is unloaded from 1 bottom discharging pipe 7 of bed body, gas after the reaction is discharged from 6 outlet ducts at 1 top of bed body.

Hydrogen fluoride in the uranium dioxide hydrofluorination technology tail gas enters into the bed body 1 from 5 adverse current modes of intake pipe, and in the bed body 1, uranium conversion uranium dioxide technology tail gas gets into from 1 lower extreme of the bed body, and the uranium dioxide that gets into with 1 upper end inlet pipe 4 of the bed body contacts against the current, during the contact, because the downward whereabouts of uranium dioxide, produces abundant collision/contact with the hydrogen fluoride of upflow, has improved the absorption rate of hydrogen fluoride in the uranium dioxide to the tail gas.

In addition, under the action of the movable central shaft 2 and the baffle plate 3, the uranium dioxide entering the bed body 1 from the feeding pipe 4 slowly falls down, and the contact time of uranium dioxide particles and hydrofluorination process tail gas is prolonged.

It should be further noted that the arrangement of the feeding pipe 4 and the air inlet pipe 5 on the bed 1 can be changed by any means by those skilled in the art, and the arrangement is within the protection scope of the present patent as long as the arrangement does not exceed the spirit of the present patent;

for example:

the feeding pipe 4 and the air inlet pipe 5 are arranged at the same side of the bed body 1;

the feeding pipe 4 and the air inlet pipe 5 are arranged on different sides of the bed body 1;

the feeding pipe 4 is arranged at a position above the central line of the bed body 1, and the air inlet pipe 5 is arranged at a position below the central line of the bed body 1.

Preferably, the hydrofluorination process tail gas is mostly excess HF gas containing a small amount of impurities such as water vapor and nitrogen. The working environment is hydrogen fluoride atmosphere, therefore, the bed body must be corrosion resistant. In addition, the material of the moving bed 3 must be resistant to high temperatures because the temperature must be increased to 200 to 230 ℃ during operation. Comprehensively considering, the material of the bed body is Monel400, Monel400 is a corrosion-resistant alloy with the largest dosage, the widest application and the excellent comprehensive performance, and the alloy has excellent corrosion resistance in hydrofluoric acid and fluorine gas media and also has excellent corrosion resistance to hot concentrated alkali liquor.

In this embodiment, the feeding pipe 4 is installed on the bed body 1 in an inclined manner, a solid feeding pipe 4, which is an inclined pipe, is installed on the upper side of the bed body, the inclined angle formed by the feeding pipe 4 and the axis of the bed body 1 is 20-60 °, and the optimum inclined angle is 30 °. The feeding pipe 4 is obliquely arranged on the bed body 1, so that uranium dioxide powder can enter the bed body 1 in a cutting-in mode, and materials entering the bed body 1 are smoother, in addition, the feeding pipe 4 is obliquely arranged on the bed body 1 instead of being directly fixed right above the bed body 1, and the feeding pipe 4 is used for avoiding the phenomenon that uranium dioxide particles entering the bed body 1 from the feeding pipe 4 fall into the bed body 1 in a vertical state when the feeding pipe 4 is arranged right above the bed body 1, so that the uranium dioxide is deposited on the baffle plate 3 in the falling process of the uranium dioxide, and the uranium dioxide particles are blocked (namely 'dead bed') on the baffle plate 3, therefore, the feeding pipe 4 is obliquely arranged on the bed body 1 and has the effect of buffering the uranium dioxide particles to enter, so that the uranium dioxide continuously and slowly enters the bed body and keeps a good feeding state, so as to meet the requirement of secondary contact between the uranium dioxide and the hydrogen fluoride.

In this embodiment (see fig. 1 and 2), an upper cover 8 is installed on the top of the bed body 1, and the upper end of the moving central shaft 2 penetrates through the upper cover 8 and is connected to a vibration mechanism 9. The vibration mechanism 9 can be an electric cylinder, a hydraulic cylinder, an electric telescopic rod, a motor, a cam reciprocating mechanism and a mechanism capable of driving a moving central shaft to complete linear reciprocating motion.

Under the action of the vibration mechanism 9, the vibration mechanism 9 drives the moving central shaft 2 to do linear reciprocating motion in the bed body 1 when running, and the baffle plate 3 is driven by the moving central shaft 6 to vibrate up and down in the bed body 1, so that the contact time of uranium dioxide particles and hydrofluorination process tail gas is prolonged, and the phenomenon of 'dead bed' caused by uranium dioxide particles bonded on the baffle plate is prevented.

In this embodiment (shown in fig. 1-3), the vibration mechanism 9 includes a motor 10, a cam 11, and a transmission rod 12, the cam 11 is an eccentric rotating cam, the cam 11 is mounted on an output shaft of the motor 10, the transmission rod 12 is connected to a pivot O, one end of the transmission rod 12 is mounted in relation to the cam 11, and the other end of the transmission rod 12 is mounted in relation to the moving central shaft 2. So set up, motor 10 drives cam 11 and rotates, and under the effect of cam 11, transfer line 12 uses O to reciprocate as the fulcrum action, and transfer line 12 drives and moves central axis 2 and reciprocate from top to bottom, and baffling board 3 is in order to vibrate from top to bottom in the bed body under the drive of central axis, and further extension can prolong the contact time of solid particle and hydrofluorination technology hydrogen fluoride tail gas to increase the absorption rate of uranium dioxide to hydrogen fluoride in the tail gas. In addition, under the action of the vibration mechanism 9 of the embodiment, the moving central shaft 2 drives the baffle plate 3 to vibrate at a certain frequency, and the phenomenon of 'dead bed' caused by uranium dioxide particles bonded on the ring plate is prevented.

In this embodiment (refer to fig. 2), still install extension spring 13 on removing center pin 2, extension spring 13's other one end is fixed, for example fixes on the crossbeam of factory building (H point department), through setting up extension spring 13, makes to remove center pin 2 in vertical direction reciprocating motion process, has a resilience force, and the benefit under the effect of this resilience force is: the moving central shaft 2 can be assisted to rise, the vibration frequency of the vibration mechanism 9 is improved, and the contact rate of uranium dioxide and hydrogen fluoride in the bed body 1 is further improved; under the action of the point H of the hook of the tension spring 13, the gravity borne by the moving central shaft 2 can be reduced; the load of the motor 10 can be reduced in an auxiliary manner under the action of the tension spring 13, and the service life of the motor 10 is prolonged.

In the present embodiment (see fig. 1 and 3), the baffle 3 includes an inner ring plate 14 and an outer ring plate 15, and the inner ring plate 14 and the outer ring plate 15 are installed on the moving center shaft 2 in an inclined manner.

The inner ring plate 14 and the outer ring plate 15 constitute a baffle plate, a pair of the inner ring plate 14 and the outer ring plate 15 is a stage, and several stages of baffle plates 3, for example, 20 stages, are installed on the whole moving central shaft 2, wherein the inner ring plate 14 and the outer ring plate 15 are arranged on the moving central shaft 2 at an angle of 10 ° inclination, the inner ring plate 14 is inclined downwards at an angle of 10 ° in the horizontal direction, and the outer ring plate 15 is inclined upwards at an angle of 10 ° in the horizontal direction; the baffle plate structure formed by the inner annular plate 14 and the outer annular plate 15 increases the retention time of materials in the reactor, the inclination angle of 10 degrees is equal to the numerical value of the material accumulation angle, and the unsmooth falling of the materials is avoided. The moving central shaft 2 drives the baffle plate connected to the moving central shaft to vibrate, the materials jump and fall step by step, the reaction time is effectively prolonged, and the device is suitable for most materials with poor fluidity to react.

In this embodiment (see fig. 1 and 2), a sealing bin 16 is fixed at the central position of the upper cover 8, the moving central shaft 2 penetrates through the sealing bin 16, a gap formed by the sealing bin 16 and the moving central shaft 2 is filled with sealing filler, and the upper end of the sealing bin 16 is compressed by a sealing gland 17. A packing seal box is arranged between the moving central shaft 2 and the upper cover 8, and sealing packing is filled in the seal cabin 16 and the seal gland 17 to realize sealing so as to prevent fluorine-containing gas from leaking.

In this embodiment (refer to fig. 5), an external heater 20 is disposed outside the bed body 1 for heating the bed body 1, the external heater 20 is an electromagnetic coil (not shown in the figure) wound around the periphery of the bed body 1, and the electromagnetic coil is energized to realize inductive heating, so that the reaction temperature inside the bed body 1 reaches 200-.

Preferably, the outer heater 20 is provided with an upper temperature sleeve 21 and a lower temperature sleeve 22, and the upper temperature sleeve 21 and the lower temperature sleeve 22 are internally provided with temperature detecting sensors for monitoring the reaction temperature.

In the present embodiment (see fig. 1, 3 and 4), the inner ring plate 14 and the outer ring plate 15 are fixed on the moving center shaft 2, the inner ring plate 14 and the outer ring plate 15 are positioned by a distance tube 19, a base plate 23 is fixed on the moving center shaft 2, the distance tube 19 is sleeved on the moving center shaft 2, the base plate 23 is used for supporting the distance tube 19, a plurality of positioning holes 24 are formed in the distance tube 19 from top to bottom, the positioning holes 24 are used for positioning the inner ring plate 14 and the outer ring plate 15, a section of external thread is formed in the upper end of the moving center shaft 2, a locking nut 25 is mounted on the external thread at the upper end of the moving center shaft 2, and the locking nut 25 locks the distance tube 19 on the moving center shaft 2. Under the action of the distance pipes 19, the positioning installation is realized between the inner ring plate 14 and the outer ring plate 15, meanwhile, the distance pipes 19 can improve the installation strength of the inner ring plate 14 and the outer ring plate 15 on the moving central shaft 2, and the baffle plates 3 (the inner ring plate 14 and the outer ring plate 15) are ensured not to be deformed easily.

In this embodiment (see fig. 5), a cone 26 is connected to the lower end of the bed 1 by a flange, and the discharge pipe 7 is provided on the cone 26.

In this embodiment (see fig. 6 and 7), a guide ring 27 is fixedly mounted on the bottom of the bed 1, and the bottom of the moving center shaft 2 is mounted in the guide ring 27. The guide ring 27 has a limiting effect, and under the effect of the guide ring 27, the moving central shaft 2 does not deflect in the up-and-down vibration process in the bed body 1, so that the moving central shaft 2 is prevented from contacting and colliding with the inner wall of the bed body 1 in the up-and-down vibration process.

In this embodiment (see fig. 1 to 7), the baffled moving bed gas-solid reaction apparatus provided is specifically defined as follows: the baffling formula moving bed outward appearance is cylindrical, and bed body 1 lower part sets up a DN 150's intake pipe 5, and the bottom is connected with cone 26 through the flange, and cone 26 bottom sets up a DN 100's discharge gate 7, and bed body 1 upside sets up a DN 100's solid material inlet pipe 4, and inlet pipe 4 and bed body axis slope 30 jiaos, and inlet pipe 4 side is feed inlet 28, and the upper end flange lid sets up a DN10 nitrogen gas import 29, and bed body 1 top sets up outlet duct 6.

20 stages of baffle plates 3 are arranged in the bed body 1, the baffle plates 3 comprise inner annular plates 14 and outer annular plates 15, and an inner annular plate and an outer annular plate are of a first stage; the downward inclination angle of the inner ring plate 14 along the horizontal direction is 10 degrees, and the upward inclination angle of the outer ring plate 15 along the horizontal direction is 10 degrees; the inner and outer ring plates are fixed on the moving central shaft 2, and are positioned by a distance pipe 19; when in operation, the inner and outer annular plates are driven by the moving central shaft 2 to vibrate up and down in the bed body 1, the frequency can be adjusted (6-60) times/min, and the amplitude is 20 mm; the top of the moving central shaft 2 passes through the upper flange of the bed body 1 to be connected with the transmission rod 12 and is hung on a tension spring 13 with one fixed end, the lower end of the moving central shaft 2 passes through the guide ring 27, and the guide ring 27 is fixed on the lower flange of the bed body 1.

The transmission cam 11, the transmission rod 12 and the tension spring 13 form a vibrating device 9, the external motor 10 drives the transmission cam 11 to rotate, so that the transmission rod 12 moves up and down repeatedly to drive the moving central shaft 2 to vibrate up and down, the moving central shaft 2, the inner ring plate 14 and the outer ring plate 15 are driven to vibrate up and down, and the tension spring 13 plays a role in buffering in the process of vibrating up and down of the moving central shaft.

The upper part of the bed body is provided with an upper temperature measuring sleeve 21, and the lower part is provided with a lower temperature measuring sleeve 22 for monitoring the reaction temperature. An external heater 20 is arranged outside the bed body and used for heating the moving bed.

The use method of the baffled moving bed gas-solid reaction device in the embodiment is as follows:

the first step is as follows: the external heater 20 is started to heat the moving bed to the reaction temperature, and the temperature is monitored by the upper section temperature measuring device 21 and the lower section temperature measuring device 22.

The second step: the vibrating device 9 is started to enable the moving central shaft 2 to drive the baffle plate to vibrate up and down, and the vibration frequency is adjustable.

The third step: solid powder materials enter from a moving bed feeding inclined pipe 4, fall on a vibrating baffle plate 3 step by means of gravity, are in countercurrent contact with reaction gas entering from a gas inlet pipe 5 at the lower part of a bed body 1, are discharged from a discharge pipe 7 after reaction, and are discharged from a gas outlet 6 at the top of the bed body 1.

The device in this example is the baffled moving bed gas-solid reaction device described in example 1.

Example 2:

the baffled moving bed gas-solid reaction device in the embodiment 1 is connected to a hydrofluorination (uranium dioxide and HF react to prepare uranium tetrafluoride) production system, and specifically comprises the following steps: the baffling type moving bed gas-solid reaction device is arranged at the tail gas end of the hydrofluorination production system, uranium dioxide is used for reacting with the tail gas of the production system containing about 30% of HF in the device, the HF adsorption efficiency reaches over 90%, and the excess HF in the hydrofluorination reaction is directly recycled, so that the HF content in the tail gas of the hydrofluorination process is obviously reduced, and the baffling type moving bed gas-solid reaction device has high environmental protection benefit and economic value.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or described herein.

It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, a person skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore the utility model does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the utility model.

The present embodiments are merely exemplary and do not limit the scope of the patent, and those skilled in the art can make modifications to the parts thereof without departing from the spirit and scope of the patent.

Claims (12)

1. A baffled moving bed gas-solid reaction device is characterized in that: the device comprises a bed body (1), a moving central shaft (2) and a baffle plate (3), wherein a feeding pipe (4) and an air inlet pipe (5) are arranged on the bed body (1), an air outlet pipe (6) is arranged at the top of the bed body (1), a discharge hole (7) is arranged at the bottom of the bed body (1), the moving central shaft (2) is arranged in the bed body (1), and the baffle plate (3) is arranged on the moving central shaft (2).

2. A baffled moving bed gas-solid reaction device according to claim 1, characterized in that: inlet pipe (4) and intake pipe (5) are all installed on the lateral wall of the bed body (1), and inlet pipe (4) are arranged in the upper portion of the bed body (1), intake pipe (5) are arranged in the lower part of the bed body (1).

3. A baffled moving bed gas-solid reaction device according to claim 1 or 2, characterized in that: an upper cover (8) is installed at the top of the bed body (1), and the upper end of the moving central shaft (2) penetrates out of the upper cover (8) and is connected with a vibration mechanism (9).

4. A baffled moving bed gas-solid reaction device according to claim 3, characterized in that: the vibration mechanism (9) comprises a motor (10), a cam (11) and a transmission rod (12), the cam (11) is installed on an output shaft of the motor (10), the transmission rod (12) is connected to a fulcrum, an installation relation is established between one end of the transmission rod (12) and the cam (11), and an installation relation is established between the other end of the transmission rod (12) and the moving central shaft (2).

5. A baffled moving bed gas-solid reaction device according to claim 4, characterized in that: still include extension spring (13), the one end and the removal center pin (2) of extension spring (13) are connected, and the other end of extension spring (13) is fixed.

6. A baffled moving bed gas-solid reaction device according to claim 1, characterized in that: the baffle plate (3) comprises an inner ring plate (14) and an outer ring plate (15), and the inner ring plate (14) and the outer ring plate (15) are arranged on the moving central shaft (2) in an inclined mode.

7. A baffled moving bed gas-solid reaction device according to claim 1, characterized in that: 15-25 stages of baffle plates (3) are arranged in the bed body (1), and each stage of baffle plate (3) comprises a pair of inner ring plates (14) and outer ring plates (15).

8. A baffled moving bed gas-solid reaction device according to claim 6, characterized in that: the inner ring plate (14) and the outer ring plate (15) are arranged on the moving central shaft (2) in an inclined angle of 5-15 degrees, the inner ring plate (14) inclines downwards along the horizontal direction, and the outer ring plate (15) inclines upwards along the horizontal direction.

9. A baffled moving bed gas-solid reaction device according to claim 3, characterized in that: a sealing bin (16) is fixed at the center of the upper cover (8), the moving central shaft (2) penetrates out of the sealing bin (16), sealing filler is filled in a gap formed by the sealing bin (16) and the moving central shaft (2), and the upper end of the sealing bin (16) is compressed through a sealing gland (17).

10. A baffled moving bed gas-solid reaction device according to claim 3, characterized in that: an external heater (20) is arranged outside the bed body (1).

11. A baffled moving bed gas-solid reaction device according to claim 6, characterized in that: a distance tube (19) is sleeved outside the moving central shaft (2), and the inner ring plate (14) and the outer ring plate (15) are positioned through the distance tube (19).

12. A hydrofluorination production system, characterized in that: comprises a baffled moving bed gas-solid reaction device as defined in any one of claims 1 to 11, which is arranged at the tail gas end of the hydrofluorination production system.

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