CN210097324U

CN210097324U - Regular silk screen packing and super-gravity rotating bed

Info

Publication number: CN210097324U
Application number: CN201920482323.7U
Authority: CN
Inventors: 谢云旭; 贾瑛; 张立清; 郭宝生; 程春生
Original assignee: Hubang Technology (beijing) Co Ltd
Current assignee: Hubang Technology (beijing) Co Ltd
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2020-02-21
Anticipated expiration: 2029-04-10

Abstract

The utility model provides a regular silk screen packs and hypergravity revolving bed, regular silk screen packs, including packing the plywood, the plywood that packs has and punches a hole, and the upper and lower surface of the plywood that packs has spacing convex part and spacing concave part respectively, and the spacing convex part and the spacing concave part of the upper and lower surface of adjacent two-layer plywood that packs mutually support for inject the relative displacement between the plywood that packs. The utility model discloses a regular silk screen packing is applicable to and handles big tolerance (1700 m)³—2300m³) The high-speed (800-1200 r/min), large diameter (800mm, 200mm thick) and large liquid spraying amount (200L/min) are characterized in that the limit convex parts and the limit concave parts on the upper and lower surfaces of two adjacent layers of packing laminated plates are matched with each otherThe deformation of regular silk screen packing in the working process of the rotating bed is avoided, and gas and liquid can be quickly and fully fused in the state, so that the mass transfer rate between the gas and the liquid is exponentially improved, and the aim of quickly trapping harmful substances in a short time is fulfilled.

Description

Regular silk screen packing and super-gravity rotating bed

Technical Field

The utility model relates to an environmental protection, chemical industry technical field specifically, relate to a regular silk screen packing and hypergravity revolving bed.

Background

Hydrazine-70 is used as an emergency fuel of an airplane of a certain type, a large amount of toxic and harmful high-temperature steam is discharged after combustion, the peak ammonia concentration reaches 39%, hydrazine reaches 3000ppm, and the discharge concentration far exceeds the national discharge standard: 4mg/m3 of ammonia is less than or equal to about 5 ppm; hydrazine is less than or equal to 0.13mg/m3 about 1 ppm. In order to ensure that field operators and surrounding residents are prevented from being damaged by toxic gas, blue sky white clouds are protected, and the toxic tail gas is treated and purified quickly and efficiently, so that a large amount of toxic tail gas is discharged imperatively.

The biggest difficulties in tail gas treatment for the above situations are:

1. the discharge flow rate is large (2000m 3/hour-3000 m 3/hour);

2. the emission concentration is high (39% of ammonia; 3000ppm of hydrazine);

3. short discharge time (only 2 min);

4. the device has small space (vehicle-mounted, the external dimension is limited to 2400mm long, 1300mm wide and 1700mm high);

5. the discharge is smooth and no blockage exists. (otherwise serious damage to the aircraft engine can occur).

The industrial experts indicate that any one of the five indexes is even relaxed, which is a well-finished task, and the key point is that the five indexes are just converged together to form a task which is difficult to finish.

The hydrazine and the ammonia can be dissolved in water in any ratio (unless saturated), and the tail gas is introduced into a spray tower and is sprayed on the surface of a packing by an acid liquid in a gas-liquid convection mode to absorb the hydrazine and the ammonia in the tail gas in a traditional treatment mode. According to the exhaust volume and the emission concentration, under the same working condition, the ground processing station adopts a spray tower with the diameter of about 1m and the height of 9m to complete the work, the size can be arbitrarily enlarged, the processing time and the space are not limited, and a vehicle-mounted device needs to complete the reduction of the ammonia concentration from 39% to less than or equal to 5ppm (the concentration is reduced by 78000 times) in a narrow space; the hydrazine concentration is reduced from 3000ppm to less than or equal to 1ppm (the concentration is reduced by 3000 times), and the hydrazine concentration is required to be completed within 2min, so that the challenge difficulty is conceivable.

In addition, the high-gravity rotating bed is mainly used as a key core component in tail gas treatment equipment and is also a key factor for limiting whether the high-gravity equipment can exert the maximum efficiency, and the specific surface area of the rotating bed filler, the rotating speed of the rotating bed, the liquid holdup of the rotating bed, the weight of the rotating bed, the power system of the rotating bed and the like are important factors for influencing mass transfer of substances among phases of the high-gravity equipment.

The core of the supergravity technology is actually a different-phase intensified mass transfer technology, and the working principle is that through the centrifugal force-supergravity generated by the high-speed rotation of a rotating bed, gas-liquid is subjected to mass transfer exchange rapidly in the rotating bed with a large specific surface area in the modes of convection, baffling, cross flow and the like, so that harmful components in tail gas are rapidly captured through absorption liquid, and the tail gas is purified. The rotating speed of the rotating bed, the specific surface area of the filler in the rotating bed, the liquid holdup of the rotating bed, the tail gas flow and other indexes are all important factors influencing the tail gas treatment effect. For treating large-volume industrial exhaust gas, it is important to select a filler with relatively light weight (low energy consumption) and large specific surface area (large contact area between phases), and from the viewpoint of various fillers which are widely applied in the market, the wire mesh filler is the best choice in terms of three indexes of easy gas-liquid passing amount, effective contact area between phases and weight. However, a problem is also brought about, namely the deformation problem caused by the wire mesh packing under the action of the high gravity field is a core problem which restricts the engineering application of the high gravity technology in many fields, especially for a large-size rotating bed.

The packing is divided into two categories, namely regular packing and bulk packing according to the structure of the packing. Structured packing is formed by regularly arranging and stacking regular packing in a certain geometric shape, and is used for packing of a super-gravity rotating bed due to the uniform distribution of weight and structural stability. The large-aperture stainless steel corrugated plate packing is commonly used, but due to the special structure and weight limitation, the manufacturing of the rotary bed with large diameter (800mm), large specific surface area (1200-1400) and high rotating speed (800-1200 r/min) is extremely difficult, and the searching and searching find that the rotary bed has large size (the diameter of the rotary bed exceeds 800mm) no matter the structured packing or the bulk packing; high speed (over 800 rpm) high gravity rotating beds have not been successfully designed for engineering applications.

The rotating bed application case is larger than the diameter (1300mm), but the rotating speed is only 300-400 r/min, the low rotating speed means that the thickness of a liquid film is formed, the interface is slowly updated, the gas-liquid exchange efficiency is low, and the technical advantage of supergravity is lost; moreover, the hypergravity equipment is only suitable for processing the super-large air volume (more than 10000 m)³Per hour).

The rotating speed is higher than the rotating speed, the rotating speed can reach more than 3000 r/min, but the diameter of the rotary table can only be controlled within 200mm, the air flow throughput is small, the practical value of engineering application is not provided, the rotary table is only suitable for being used in certain specific fields, and the application range is narrow.

The stainless steel wire mesh corrugated packing is used as one type of regular packing, has larger specific surface area and better liquid discreteness (compared with a 0.3mm corrugated plate and a 0.3mm wire diameter steel wire) than stainless steel large-aperture corrugated plate packing under the condition of the same weight and the same rotating speed, the specific surface area is increased by 20-40 percent, which means that the area of gas-liquid exchange is increased by 20-40 percent, and the efficiency of tail gas treatment and absorption is also increased in the same proportion. However, the wire mesh packing, especially a large-diameter wire mesh packing bed, can cause final dynamic balance imbalance of tightness inside and tightness outside due to high-speed rotation deformation, and how to find a wire mesh packing which rotates at a high speed and does not deform becomes a key point for seeking technical breakthrough. Because there are many related influence factors and the interaction results in dynamic variables (specific surface area of filler, rotation speed, liquid spraying amount, liquid spraying pressure, liquid feeding area, gas flow rate, diameter of rotating bed, thickness of rotating bed, effective passing area of rotating bed, etc.), the industry has no mature and perfect theoretical system and accurate calculation method. In view of this, the present invention is especially provided.

SUMMERY OF THE UTILITY MODEL

The conventional silk screen filler is generally woven into a sheet shape by a knitting machine through steel wires, the sheet shape is formed by extrusion through a die, then the sheet shape is laminated, the thickness and the material of the silk diameter and the size of the pore diameter directly influence the flexibility and the deformation degree of the filler, no matter what weaving method and material and silk diameter are adopted, the deformation can be generated under the condition of high-speed rotation, and the deformation mainly comprises two reasons: firstly because be the longitude and latitude between silk and the silk and build up the knitting, silk and silk can produce relative displacement and lead to warping under the effect of centrifugal force, secondly because every piece packs the rigidity not enough, upper and lower floor does not have rigidity restraint after the pressure stack and misplaces each other and warp from top to bottom.

The utility model discloses a first eyesight the power of putting forth solves above-mentioned two problems, specifically:

the utility model provides a regular silk screen packs, includes the packing plywood, and the packing plywood has and punches a hole, and the upper and lower surface of packing plywood has spacing convex part and spacing concave part respectively, and the spacing convex part and the spacing concave part of the upper and lower surface of adjacent two-layer packing plywood mutually support for inject the relative displacement between the packing plywood.

Furthermore, the limit convex parts and the limit concave parts on the adjacent surfaces of the two adjacent layers of the filler laminated plates are staggered and laminated, and the upper layer and the lower layer form an organic integral structure which is compact in combination and mutually dragged by the upper layer and the lower layer through the relative extrusion deformation of the two adjacent layers of the filler laminated plates extruded by the model plate;

preferably, the upper surface of each filler laminate is provided with an inverted V-shaped convex part and a V-shaped concave part, the lower surface of each filler laminate is provided with an inverted V-shaped convex part and a V-shaped concave part, and the inverted V-shaped convex parts and the V-shaped concave parts on the adjacent surfaces of the two adjacent layers of filler laminates are staggered and laminated at an angle of 45 degrees; the punched holes are rhombic;

preferably, the specific surface area of the structured silk screen packing is 1200-1400.

The second purpose of the present invention is to provide a device suitable for handling large gas volume (1700 m)³----2300m³) High rotation speed (800 r/min-1200 r/min), large diameter (800mm in diameter and 200mm in thickness), and large liquid spraying amount(200L/min), continuously rotating and non-deforming wire mesh packing and a super-gravity rotating bed.

A high-gravity rotating bed with the structured wire mesh packing, comprising:

rotating the bed body, and arranging regular silk screen packing in the bed body;

the hollow liquid spraying shaft is connected with the rotating bed body to drive the rotating bed body to rotate;

the peripheral wall of the hollow liquid spraying shaft is provided with a plurality of liquid spraying holes for supplying liquid to the regular silk screen packing in the process that the hollow liquid spraying shaft drives the rotating bed body to rotate.

Furthermore, the rotating bed body comprises an annular frame, an upper cover plate and a lower cover plate, wherein the upper cover plate and the lower cover plate are used for sealing openings at two ends of the annular frame, the hollow liquid spraying shaft is respectively and fixedly connected with the upper cover plate and the lower cover plate, and liquid spraying holes are formed in the peripheral wall, positioned between the upper cover plate and the lower cover plate, of the hollow liquid spraying shaft.

Furthermore, the annular frame comprises an inner annular coaming and an outer annular coaming, the upper cover plate and the lower cover plate are respectively covered on the annular openings of the inner annular coaming and the outer annular coaming, one end of the hollow liquid spraying shaft penetrates through the inner part of the inner annular coaming to be fixedly connected with the lower cover plate, and the middle part of the hollow liquid spraying shaft is fixedly connected with the upper cover plate;

preferably, the upper cover plate is provided with an upper spline groove, the lower cover plate is provided with a lower spline groove, and the hollow liquid spraying shaft is provided with an upper spline for assembling the upper spline groove and a lower spline for assembling the lower spline groove;

preferably, the upper cover plate, the lower cover plate, the inner ring coaming and the outer ring coaming are integrally formed.

Furthermore, a plurality of penetrating rods which are arranged in parallel with the hollow liquid spraying shaft are arranged between the upper cover plate and the lower cover plate and are used for dispersing the centrifugal force of the rotating bed to avoid the irreversible deformation of the filler;

preferably, the penetrating rods are distributed on the same circumference between the inner ring coaming and the outer ring coaming, and the circumference is concentric with the inner ring coaming and the outer ring coaming;

preferably, a plurality of circles of penetrating rods are arranged between the inner ring coamings and the outer ring coamings.

Furthermore, the liquid spraying device also comprises a liquid inlet pipe communicated with the hollow liquid spraying shaft, and a rotary sealing device is arranged between the liquid inlet pipe and the hollow liquid spraying shaft.

Furthermore, the diameter of the outer diameter of the rotary bed body is 800 mm-1200 mm, the inner diameter is 100 mm-150 mm, the thickness is 150 mm-200 mm, and the rotating speed is 800 r/min-1200 r/min;

preferably, the weight of the dry bed is 30 kg-50 kg, the liquid spraying amount is 80L/min-120L/min, the weight of the wet bed is 100 kg-150 kg, and gas and liquid are exchanged in a 90-degree cross flow manner.

The utility model discloses a regular silk screen packing is applicable to and handles big tolerance (1700 m)³----2300m³) The supergravity rotating bed has the advantages that the supergravity rotating bed has high rotating speed (800-1200 r/min), large drift diameter (800mm in diameter and 200mm in thickness) and large liquid spraying amount (200L/min), and the limit convex parts and the limit concave parts on the upper surface and the lower surface of the adjacent two layers of packing laminated plates are matched with each other, so that the deformation of regular silk screen packing in the working process of the rotating bed is avoided, gas and liquid can be quickly and fully fused under the state, the mass transfer rate between the items of the gas and the liquid is improved exponentially, and the aim of quickly trapping harmful substances in a short time is fulfilled.

The utility model discloses a hypergravity revolving bed, cavity hydrojet axle 11 design have dual function, have the hydrojet function except that the function that has the axle still concurrently, and such design thought mainly is based on two points and considers, can reduce cavity hydrojet axle 11 and the interior ring's of revolving bed interval greatly, lets out the effective area of passing through of space increase revolving bed. And secondly, the upper cover plate, the inner ring coaming, the outer ring coaming and the lower cover plate can be manufactured into a circular organic whole, so that the structural stability of the rotating bed is greatly improved, the upper cover plate and the lower cover plate are connected with the hollow liquid spraying shaft 11 into a whole through the spline grooves to rotate together, and the torque is transmitted through the upper cover plate and the lower cover plate simultaneously, so that the head swinging phenomenon caused by high-speed rotation is avoided.

Drawings

FIG. 1 is a flow chart of a purification process of the tail gas treatment device of the present invention;

FIG. 2 is a system flow chart of the tail gas treatment device of the present invention;

FIG. 3 is a schematic diagram of a liquid path system of the tail gas treatment device of the present invention;

FIG. 4 is a liquid path system diagram (circulation state) of the tail gas treatment device of the present invention;

FIG. 5 is a liquid path system diagram (liquid discharge state) of the tail gas treatment device of the present invention;

FIG. 6 is a liquid path system diagram (liquid replenishment state) of the tail gas treatment device of the present invention;

FIG. 7 is a system flow diagram of a conventional high-gravity rotating bed;

FIG. 8 is a system flow chart of the high gravity rotating bed of the present invention;

FIG. 9 is a schematic structural view of a conventional high-gravity rotating bed;

FIG. 10 is a schematic view of the super-gravity revolving bed of the present invention;

FIG. 11 is a schematic view of a three-dimensional structure of a rotating bed body of the super-gravity rotating bed of the present invention;

FIG. 12 is a top view of the high gravity rotating bed of the present invention;

FIG. 13 is a schematic perspective view of a packing layer plate of the structured wire mesh packing of the present invention;

FIG. 14 is a cross-sectional view of a packing ply of the inventive structured wire mesh packing;

FIG. 15 is a schematic view of the three-dimensional structure of the structured wire mesh packing of the present invention;

FIG. 16 is a schematic view of the structure of the hollow liquid spraying shaft of the super-gravity revolving bed of the present invention;

fig. 17 is a schematic view of the installation of the hollow liquid spraying shaft of the super-gravity rotating bed of the present invention.

Detailed Description

The following describes the regular silk screen packing and the super-gravity rotating bed in detail with reference to the attached drawings:

example one

As shown in fig. 8, the present embodiment provides an exhaust gas treatment device, including:

a tank body 2;

the convection purification device is arranged in the tank body and is used for the convection purification of the tail gas;

and/or the cross-flow purification device is arranged in the tank body and is used for cross-flow purification of the tail gas;

the tail gas is introduced into the tank body 2 and is subjected to convection purification by a convection purification device and/or cross-flow purification by a cross-flow purification device.

The tail gas processing apparatus of this embodiment has integrated convection current purifier and cross-flow purifier in same jar internal, and convection current purifier and/or cross-flow purifier can handle tail gas, and integrated degree is high, satisfies tail gas processing apparatus's space requirement.

Further, an air inlet 1 for tail gas to enter is arranged at the bottom of the tank body 2, an air outlet 9 for tail gas to exhaust is arranged at the top of the tank body 2, and a convection purification device and a cross-flow purification device are sequentially arranged in the tank body from the air inlet 1 to the air outlet 9; the convection purification device comprises a gas distributor 3 and a liquid distributor 4 arranged above the gas distributor 3; the cross flow purification device is a super-gravity rotating bed 5.

As shown in fig. 7, the conventional supergravity device is that the supergravity rotating bed and the outer shell form a relatively closed narrow space, so as to form a supergravity field with a single function.

The tail gas treatment device breaks through the single structure of the hypergravity device according to local conditions, liquid collection and storage, gas rectification and flow stabilization, system liquid spraying circulation and cross flow and convection integration are completed in one space, mass transfer efficiency of gas-liquid fusion is greatly accelerated, and system purification effect is improved exponentially. The space layout integrates the dual functions of the absorption tower and the supergravity technology.

As shown in fig. 3, the exhaust gas treatment device of this embodiment further includes a liquid path system, and the liquid path system includes:

the water pump 8 is used for driving the tail gas absorption liquid to circularly flow;

the first pipeline is communicated with the water pump 8 and the bottom of the tank body 2, and a first valve V1 is arranged on the first pipeline;

the second pipeline is used for discharging the tail gas absorption liquid in the tank body 2, and a second valve V2 is arranged on the second pipeline;

the third pipeline is used for supplementing tail gas absorption liquid into the tank body 2, and a third valve V3 is arranged on the third pipeline;

the fourth pipeline is communicated with the water pump 2 and the liquid distributor 4, and a fourth valve V4 is arranged on the fourth pipeline;

and a fifth pipeline which is communicated with the liquid inlet ends of the water pump 2 and the super-gravity rotating bed 5 and is provided with a fifth valve V5.

The tail gas processing apparatus of this embodiment is according to purifying process technological requirement and spatial layout requirement, through the switching of different valves, fine three kinds of states that have realized system work in limited space:

as shown in fig. 4, the exhaust gas absorption liquid circulation state is as follows: and controlling the first valve V1, the fourth valve V4 and the fifth valve V5 to be opened, the second valve V2 and the third valve V3 to be closed, pumping the tail gas absorption liquid to a liquid distributor and a super-gravity rotating bed through a water pump, and spraying the tail gas absorption liquid out, wherein the tail gas absorption liquid circulates in the tank body.

As shown in fig. 5, the exhaust absorption liquid discharge state: when the tail gas absorption liquid in the tank body reaches a saturated state, the first valve V1 and the third valve V3 are controlled to be opened, the second valve V2, the fourth valve V4 and the fifth valve V5 are controlled to be closed, and the tail gas absorption liquid is pumped by the water pump and is discharged through the second pipeline.

As shown in fig. 6, the exhaust gas absorption liquid is in a liquid replenishment state: and controlling the second valve V2, the fourth valve V4 and the fifth valve V5 to be opened, closing the first valve V1 and the third valve V3, and pumping the tail gas absorption liquid through the water pump to replenish liquid into the tank body through a third pipeline.

As an embodiment of the present invention, the liquid distributor 4 includes main liquid pipe and a plurality of liquid distribution pipes that are linked together with main liquid pipe respectively, main liquid pipe and liquid distribution pipe on towards the at least three rows of hydrojet holes of one side equipartition of gas distributor. Preferably, the spraying direction of the liquid spraying holes is 45 degrees to the horizontal plane. The liquid distributor 4 of the embodiment mainly sprays liquid to the gas distributor 3, so that the surface of the silk screen packing is fully wetted to form a wetted labyrinth channel, and the gas and the liquid are fully contacted in a large area.

The above-mentioned tail gas processing apparatus of this embodiment can regard as independent purification module to carry out the tail gas treatment, also can make up according to specific requirement and further promote the efficiency of tail gas treatment. Further, as shown in fig. 1, the tail gas treatment device of the present invention starts from the purification principle, and fully contacts the gas and the liquid in the limited time and the effective space as much as possible, so as to prolong the mass transfer time between the gas and the liquid to the maximum extent, thereby achieving the purification purpose. The tail gas treatment process flow adopts a four-stage absorption method:

first-stage: rectifying and purifying, wherein tail gas is changed into uniform, fine and stable flow from turbulence, and gas-liquid up-and-down convection interaction is formed;

and (2) second stage: supergravity purification, wherein gas and liquid form axial and radial cross flow interaction;

third-stage: rectifying and purifying, wherein tail gas is changed into uniform, fine and stable flow from turbulence, and gas-liquid up-and-down convection interaction is formed;

and (4) fourth stage: and (4) supergravity purification, wherein gas and liquid form axial and radial cross flow interaction.

Based on above-mentioned tail gas treatment process flow, the tail gas processing apparatus of this application includes:

the first purification module is used for the convection purification and/or cross-flow purification of the tail gas;

the second purification module is used for the convection purification and/or the cross-flow purification of the tail gas;

the first purification module and the second purification module are connected in series, and tail gas is purified in a multistage mode sequentially through the first purification module and the second purification module.

The first purification module and the second purification module of this embodiment are connected in series, and tail gas loops through first purification module and second purification module and carries out at least two-stage purification, when first purification module and second purification module all have convection current purification and cross-flow and purify, can realize the level four purifying effect of above-mentioned tail gas treatment process.

The tail gas treatment device of this embodiment adopts relatively independent first purification module and second purification module series connection to use, has prolonged the mass transfer time between gas, liquid item greatly, and the alternative use of cross-flow and convection current technique makes gas, liquid "rub and rub" more even to improve purification efficiency by multiples.

Specifically, as shown in fig. 2, the first purification module described in this embodiment includes a first tank 2-1, and a first cross-flow purification device are disposed in the first tank 2-1; the second purification module comprises a second tank body 2-2, and a second convection purification device and a second cross-flow purification device are arranged in the second tank body 2-2; the first tank body 2-1 is provided with a first gas outlet for exhausting tail gas, the second tank body 2-2 is provided with a second gas inlet for entering the tail gas, and the first gas outlet is communicated with the second gas inlet.

Further, an air inlet 1 for tail gas to enter is arranged at the bottom of the first tank body 2-1, a first air outlet for tail gas to exhaust is arranged at the top of the first tank body 2-1, and a convection purification device and a cross-flow purification device are sequentially arranged in the first tank body 2-1 from the air inlet 1 to the first air outlet; the convection purification device comprises a first gas distributor 3-1 and a first liquid distributor 4-1 arranged above the first gas distributor 3-1; the cross flow purification device is a first super-gravity rotating bed 5-1.

A second air inlet for tail gas to enter is formed in the bottom of the second tank body 2-2, an air outlet 9 for tail gas to exhaust is formed in the top of the second tank body 2-2, and a convection purification device and a cross-flow purification device are sequentially arranged in the second tank body 2-2 from the second air inlet to the air outlet 9; the convection purification device comprises a second gas distributor 3-2 and a second liquid distributor 4-2 arranged above the second gas distributor 3-2; the cross flow purification device is a second super-gravity rotating bed 5-2.

As an implementation manner of this embodiment, the first tank 2-1 of this embodiment has a first air inlet for entering the tail gas, the second tank has a second air outlet for exhausting the tail gas, and the first air inlet and the second air outlet are respectively provided with a micro differential pressure sensor; the first air outlet of the first tank body is communicated with the second air inlet of the second tank body through a communicating pipeline, and a flow guide fan 6 is arranged on the communicating pipeline. The connecting pipeline of the two tanks of the embodiment is provided with the guide fan, the air quantity of the system is automatically adjusted (the rotating speed of the guide fan) by a frequency converter through signals given by differential pressure sensors arranged at the inlet and the outlet of the system, so that the air quantity of the inlet and the outlet reaches dynamic balance, namely the pressure of the inlet and the outlet keeps a delta P difference value, and thus, the mass transfer exchange of gas phase and liquid phase can be carried out at a relatively reasonable speed while the system is ensured not to generate air flow blockage.

The jar body of this embodiment: the device is formed by connecting two tank bodies with the diameter of 800mm and the height of 1400mm in series, absorption liquid is filled at the bottom of each tank body, and a gas distributor (fixed bed) is sequentially arranged at the upper part of the liquid; a liquid distributor; super-gravity rotating bed (moving bed): an upper cover plate; a hollow shaft; bearing sleeves, and the like.

Gas homogenizer of the present example: rectification purification is realized by means of gas homogenizing gas. Stainless steel wire gauze packing with the specific surface area larger than 800 is adopted, the diameter is 800mm, and the thickness is 200 mm. The main effect is that the torrent (entry diameter 100mm) tail gas that makes ≧ 0.2Mpa is evenly cut for tiny air current in the twinkling of an eye, through the wet passageway of labyrinth evenly rise, and absorption liquid sprays down through the liquid distributor, and gas, liquid form the convection current exchange on the surface of packing in the twinkling of an eye, have not only played the first grade purifying effect, make the tail gas with 100% RH's appearance evenly rise (rectification) and get into the rotatory bed of hypergravity, promoted the effective area of contact of gas, liquid on the rotatory bed of hypergravity packing surface greatly.

The exhaust gas treatment device of the present embodiment further includes:

1. base seat

The tank body is formed by welding channel steel and is mainly used for positioning the tank body, mounting parts and fixing an automobile bottom plate.

2. Power system

The device consists of a motor, a timing belt, a belt pulley, a hollow shaft and a rotating bed (shown in the figure), and the rotating speed of the motor is adjusted by a frequency converter according to the load of a system to gradually reach the ideal rotating speed. The specific method comprises the following steps: the rotating speed and the liquid spraying amount of the rotary table are adjusted by observing the atomization state of the liquid at the outer edge of the rotary table through a window, and the sprayed liquid is uniform and fine droplets in a physical state.

3. Gas-liquid separator

Considering that the gas-liquid separation works for a short time, a customized filter element type gas-liquid separator is specially adopted, and the installation mode has a compact structure and saves space.

4. Automatic control system

The system comprises:

a perception module: a differential pressure sensor; ammonia, hydrazine sensors; a liquid level sensor; a pH value sensor; a temperature sensor;

a control module: a frequency converter; a PLC programmable controller;

an execution module: a heating fan; a buzzer; overload protection; a purge and suction system; a fault alarm is carried out;

the display module assembly: the touch screen can edit and set various parameter indexes;

the control system can freely set all functions of system heating time, the rotating speed of the super-gravity rotating bed, liquid spraying amount control, liquid supplementing, liquid discharging and the like according to the temperature of the working environment, the interface is simple, the operation is convenient, and all functions can be easily operated according to the prompt of the interface.

The present embodiment also provides a method for controlling the processing apparatus, where the processing apparatus includes a control system, and the method includes:

the control system controls the convection purification device and/or the cross-flow purification device to carry out convection purification and/or cross-flow purification on the tail gas entering the shell.

Further, the control method of the exhaust gas treatment device comprises the following steps:

the control method of the liquid path system comprises the following steps: controlling a first valve V1, a fourth valve V4 and a fifth valve V5 to be opened, closing a second valve V2 and a third valve V3, pumping the tail gas absorption liquid to a liquid distributor and a super-gravity rotating bed through a water pump, and spraying out, wherein the tail gas absorption liquid circulates in the tank body;

when the tail gas absorption liquid in the tank body reaches a saturated state, controlling the first valve V1 and the third valve V3 to be opened, and controlling the second valve V2, the fourth valve V4 and the fifth valve V5 to be closed, and pumping the tail gas absorption liquid through the water pump and discharging the tail gas absorption liquid through the second pipeline;

and controlling the second valve V2, the fourth valve V4 and the fifth valve V5 to be opened, closing the first valve V1 and the third valve V3, and pumping the tail gas absorption liquid through the water pump to replenish liquid into the tank body through a third pipeline.

The control method of the diversion fan comprises the following steps: when the inlet air pressure P1 is greater than the outlet air pressure P2, the control system controls the diversion fan to accelerate and increase the air suction volume, the pressures of P1 and P2 are close, and the rotating speed of the diversion fan tends to be stable; when the inlet wind pressure P1< the outlet wind pressure P2, the control system controls the diversion fan to decelerate, the values of P1 and P2 tend to be consistent, and the control system keeps a certain suction wind quantity of the diversion fan to suck and treat the residual tail gas in the pipeline and the system completely.

The method for on-line monitoring and controlling the exhaust emission comprises the following steps: and when the content of the harmful substances in the tail gas discharged from the second gas outlet is detected to be larger than a set value, the rotating speed of the rotating bed is at least regulated and controlled to be increased, and/or the pump pressure of the water pump is increased, and/or the liquid spraying amount is increased.

Example two

The utility model of the high gravity rotary bed of the embodiment is mainly characterized by breaking through all the recognized traditional theories and thinking trends, developing a new method, innovatively obtaining innovation from four aspects of the weaving method and the filling mode of the filler, the structure of the rotary bed and the liquid feeding mode of the rotary bed, and providing a high-capacity rotary bed suitable for processing large gas (1500 m)³----5000m³) High rotating speed (800-1200 r/min), large diameter (800-1200 mm in diameter and 200mm in thickness), large liquid spraying amount (200L/min), and continuous rotation non-deformation silk screen packing and a super-gravity rotating bed.

The utility model discloses built different test models and carried out engineering verification, deduced with the anti-certificate theory of experimental effect, established the dynamic adjustment key parameter (influence factor: rotational speed, liquid jet volume) model that uses the result as the direction to grope out the universal silk screen filler manufacturing approach.

The conventional silk screen filler is generally woven into a sheet shape by a knitting machine through steel wires, the sheet shape is formed by extrusion through a die, then the sheet shape is laminated, the thickness and the material of the silk diameter and the size of the pore diameter directly influence the flexibility and the deformation degree of the filler, no matter what weaving method and material and silk diameter are adopted, the deformation can be generated under the condition of high-speed rotation, and the deformation mainly comprises two reasons: firstly because be the longitude and latitude between silk and the silk and build up the knitting, silk and silk can produce relative displacement and lead to warping under the effect of centrifugal force, secondly because every piece packs the rigidity not enough, upper and lower floor does not have rigidity restraint after the pressure stack and misplaces each other and warp from top to bottom. The utility model discloses these two problems have been solved to the impetus, specifically:

as shown in fig. 13 and 14, the structured screen packing comprises packing laminates 21, wherein the packing laminates 21 are provided with punched holes, the upper and lower surfaces of each packing laminate 21 are respectively provided with a limiting convex part 24 and a limiting concave part 23, and the limiting convex parts 24 and the limiting concave parts 23 of the upper and lower surfaces of two adjacent layers of packing laminates 21 are mutually matched for limiting the relative displacement between the packing laminates 21.

Furthermore, the limit convex parts and the limit concave parts on the adjacent surfaces of the two adjacent layers of the packing laminated plates are staggered and laminated, and the two adjacent layers of the packing laminated plates are extruded by the model plate, so that the convex parts of the upper layer and the lower layer are mutually inserted to form an organic integral structure which is compact in combination and is embedded into the upper layer and the lower layer.

Preferably, the upper surface of each filler laminate is provided with an inverted V-shaped convex part and a V-shaped concave part, the lower surface of each filler laminate is provided with an inverted V-shaped convex part and a V-shaped concave part, and the inverted V-shaped convex parts and the V-shaped concave parts on the adjacent surfaces of the two adjacent layers of filler laminates are staggered and laminated at an angle of 45 degrees; the punched holes are rhombic.

Specifically, the filler laminated plate is a stainless steel plate with the thickness of 0.3mm, diamond holes with the thickness of 4mm multiplied by 4mm are punched through a die, the edge distance is 3mm, and a V-shaped groove with the depth of 3mm is extruded on the die, so that relative displacement between wires is avoided.

The present embodiment also provides a process for manufacturing the structured silk screen packing, including: selecting a stainless steel plate with a certain thickness, punching the stainless steel plate through a die, and extruding a limiting convex part and a limiting concave part with a certain depth on the die.

Further, the manufacturing process comprises the following steps: the limit convex part and the limit convex part of each layer of the packing laminate are staggered and laminated at an angle of 45 degrees, the free height of each layer of the packing laminate is 3-5 mm, the adjacent two layers of the packing laminates are extruded by a model plate to be laminated to 4-8 mm, and the upper layer and the lower layer form an organic integral structure which is combined compactly and is embedded with each other by extruding the relative extrusion deformation of the adjacent two layers of the packing laminates by the model plate.

Preferably, the filler layer plate is made of a stainless steel plate with the thickness of 0.3mm, diamond holes with the thickness of 4mm multiplied by 4mm are punched through a die, and then a V-shaped groove with the depth of 3mm is extruded on the die.

As shown in fig. 10-17, the present embodiment also provides a high gravity rotating bed of the structured wire mesh packing, comprising:

a rotating bed body, wherein a regular silk screen packing 20 is arranged in the rotating bed body;

the hollow liquid spraying shaft 11 is connected with the rotating bed body to drive the rotating bed body to rotate;

the peripheral wall of the hollow liquid spraying shaft 11 is provided with a plurality of liquid spraying holes 27 for supplying liquid to the regular silk screen packing 20 in the process that the hollow liquid spraying shaft 11 drives the rotating bed body to rotate.

As shown in fig. 9, the rotating shaft 12 of the conventional super-gravity rotating bed drives the rotating bed body to rotate, and since the liquid feeding pipe 13 is disposed in the middle of the rotating bed body and cannot rotate together with the rotating bed, an installation space must be left between the upper cover plate and the rotating shaft 12 to suspend the upper cover plate and the rotating shaft 12, so that not only can the torque be transmitted through the lower support plate, but also the rotating bed body does not form a closed-loop frame stable structure, which is very easy to cause dynamic balance imbalance, and the high-speed rotation may cause a "head swing phenomenon".

The utility model discloses a hypergravity revolving bed adopts the quill shaft to award liquid not only to increase the effective area of awarding liquid, has improved the homogeneity of awarding liquid moreover and has effectively increased the effective area that gaseous passes through, has improved the efficiency of gas-liquid exchange.

Further, as shown in fig. 11 and 12, the rotating bed body according to this embodiment includes an annular frame 16, an upper cover plate 17 and a lower cover plate 15 that cover openings at two ends of the annular frame 16, the hollow liquid spraying shaft 11 is fixedly connected to the upper cover plate 17 and the lower cover plate 15, respectively, and a liquid spraying hole 27 is formed in a peripheral wall of the hollow liquid spraying shaft 11 between the upper cover plate 17 and the lower cover plate 15.

As an implementation manner of this embodiment, the annular frame 16 includes an inner annular enclosure and an outer annular enclosure, the upper cover plate and the lower cover plate respectively cover the annular openings of the inner annular enclosure and the outer annular enclosure, one end of the hollow liquid spraying shaft penetrates through the inside of the inner annular enclosure and is fixedly connected with the lower cover plate, and the middle of the hollow liquid spraying shaft is fixedly connected with the upper cover plate.

Preferably, the upper cover plate is provided with an upper spline groove 18, the lower cover plate is provided with a lower spline groove, and the hollow spray shaft 11 is provided with an upper spline for assembling the upper spline groove and a lower spline for assembling the lower spline groove.

The hollow liquid spraying shaft 11 has double functions, and has a liquid spraying function besides the shaft function, and the design idea is mainly based on two considerations, so that firstly, the distance between the hollow liquid spraying shaft 11 and the inner ring of the rotary bed can be greatly reduced, and the space is given away to increase the effective passing area of the rotary bed. And secondly, the upper cover plate, the inner ring coaming, the outer ring coaming and the lower cover plate can be manufactured into a circular organic whole, so that the structural stability of the rotating bed is greatly improved, the upper cover plate and the lower cover plate are connected with the hollow liquid spraying shaft 11 into a whole through the spline grooves to rotate together, and the torque is transmitted through the upper cover plate and the lower cover plate simultaneously, so that the head swinging phenomenon caused by high-speed rotation is avoided.

Furthermore, a plurality of penetrating rods 19 which are arranged in parallel with the hollow liquid spraying shaft 11 are arranged between the upper cover plate 17 and the lower cover plate 15 and are used for dispersing the centrifugal force of the rotating bed to avoid the irreversible deformation of the filler.

Preferably, the penetrating rods 19 are distributed on the same circumference between the inner ring coaming and the outer ring coaming, and the circumference is concentric with the inner ring coaming and the outer ring coaming.

Preferably, a plurality of circles of penetrating rods 19 are arranged between the inner ring coamings and the outer ring coamings.

According to the ring geometric diameter of revolving bed to the axle is the centre of a circle, sets up the parallel through-rod 19 of multilayer and axle between the upper and lower apron spoke of revolving bed, and through-rod 19 adopts the through-nail, and centrifugal force is undertaken in the dispersibility, avoids the major diameter to pack the inelasticity that the deformation caused.

Each layer of filler is cut into a circular ring shape according to the size of the inner ring and the outer ring, each layer is tiled and arranged in a frame, the upper layer and the lower layer are staggered at an angle of 45 degrees, the thickness of each layer is 3mm, the thickness of the two layers is 4mm by extruding a template, and the thickness of each layer is increased by 2mm, so that the upper layer and the lower layer are staggered and laminated by 1 mm. Thereby ensuring the contact of the upper layer and the lower layer is compact and not dislocated.

Convex parts of the upper and lower layers of filling laminated plates are embedded into each other to form a compact structure, and the embedded type prevents mutual displacement between the layers; the packing laminate is formed into an organism by punching the punching screen and the V-shaped groove at one time, so that mutual movement among the screens is effectively prevented; the through nails play a role in centrifugal force uniform distribution; the dynamic stability of the silk screen filler is enhanced by the three measures, so that the deformation is limited to the minimum range. The supergravity rotating bed of the embodiment further comprises a liquid inlet pipe communicated with the hollow liquid spraying shaft 11, and a rotary sealing device 29 is arranged between the liquid inlet pipe and the hollow liquid spraying shaft, so that the rotary liquid feeding and sealing of the hollow liquid spraying shaft are realized.

The diameter of the outer diameter of the rotary bed body is 800 mm-1200 mm, the inner diameter is 100 mm-150 mm, the thickness is 150 mm-200 mm, and the rotating speed is 800 r/min-1200 r/min.

Preferably, the weight of the dry bed (before liquid supply) is 30 kg-50 kg, the liquid spraying amount is 80L/min-120L/min, the weight of the wet bed (after liquid supply) is 100 kg-150 kg, and gas and liquid exchange is carried out in a 90-degree cross flow manner. The hollow spray shaft 11 has an outer diameter of 60mm, an inner diameter of 30mm and a cross-sectional area of 706mm²900 holes with diameter of 1mm are uniformly arranged on the surface of the shaft opposite to the rotating bed (with thickness of 200mm) to serve as liquid feeding and spraying holes for the rotating bed. The effective area of passing through and the revolving bed structure (if install the hydrojet pipe in addition not only the inner ring diameter increase, the upper cover plate will not form closed loop structure moreover) of revolving bed are being optimized to the intention, improve the integrality (inclosed frame construction) of revolving bed structure to improve the stability of revolving bed dynamic balance greatly, provide the foundation guarantee for the revolving bed can rotate at a high speed.

The specific operation mechanism of the super-gravity rotating bed is as follows: wet tail gas is rectified at a lower stage and then uniformly and axially rises, absorption liquid is radially sprayed on the surface of an inner ring of the rotating bed through the hollow liquid spraying shaft 11, liquid films and liquid threads are formed on the surface of a filler by the sprayed tail gas absorption liquid under the action of centrifugal force, and the liquid beads move from inside to outside in a radial direction, so that cross flow exchange of gas and liquid is formed, the rotating bed rotates at high speed (800 revolutions per minute), 8g of gravitational acceleration is instantly generated by the rotating bed, the gas and the liquid can be rapidly and fully fused in the state, and the mass transfer rate between the gas and the liquid is doubled. The aim of quickly trapping harmful substances in a short time is fulfilled.

The embodiment simultaneously provides a processing apparatus for processing tail gas on line with the high-gravity rotating bed, which comprises a tank body 2, wherein the high-gravity protecting bed is arranged inside the tank body 2.

Preferably, the upper end of the hollow spray shaft 11 extends out of the upper part of the tank 2 and is connected with a liquid inlet pipe, and a mechanical sealing device 30 is arranged between the hollow spray shaft and a cover plate 31 on the upper part of the tank 2.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims

1. The utility model provides a regular silk screen packing which characterized in that, includes the packing plywood, and the packing plywood has and punches a hole, and the upper and lower surface of packing plywood has spacing convex part and spacing concave part respectively, and the spacing convex part and the spacing concave part of the upper and lower surface of adjacent two-layer packing plywood mutually support for inject the relative displacement between the packing plywood.

2. The structured wire mesh packing of claim 1, wherein the spacing convex portions and the spacing concave portions of the adjacent surfaces of the two adjacent packing layers are staggered and laminated, and the upper and lower layers are formed into an organic integral structure with compact combination and mutual dragging of the upper and lower layers through the relative extrusion deformation of the two adjacent packing layers by the extrusion of the mold plate.

3. The structured wire mesh packing as claimed in claim 2, wherein the upper surface of the packing laminate has a Λ -shaped convex portion and a V-shaped concave portion, the lower surface has a Λ -shaped convex portion and a V-shaped concave portion, and the Λ -shaped convex portions and the V-shaped concave portions on the adjacent surfaces of two adjacent layers of packing laminates are staggered and laminated at an angle of 45 degrees; the punched holes are rhombic.

4. The structured wire mesh packing of claim 1, wherein the structured wire mesh packing has a specific surface area of 1200 to 1400.

5. A high gravity rotating bed with structured wire mesh packing according to any of claims 1-4, comprising:

6. The high-gravity rotating bed as claimed in claim 5, wherein the rotating bed body comprises an annular frame, an upper cover plate and a lower cover plate covering openings at two ends of the annular frame, the hollow liquid spraying shaft is fixedly connected with the upper cover plate and the lower cover plate respectively, and liquid spraying holes are formed in the peripheral wall of the hollow liquid spraying shaft between the upper cover plate and the lower cover plate.

7. The high-gravity rotating bed according to claim 6, wherein the annular frame comprises an inner annular enclosing plate and an outer annular enclosing plate, the upper cover plate and the lower cover plate are respectively covered on the annular openings of the inner annular enclosing plate and the outer annular enclosing plate, one end of the hollow liquid spraying shaft penetrates through the inner part of the inner annular enclosing plate and is fixedly connected with the lower cover plate, and the middle part of the hollow liquid spraying shaft is fixedly connected with the upper cover plate.

8. The high-gravity rotating bed as claimed in claim 6, wherein a plurality of penetrating rods are arranged between the upper cover plate and the lower cover plate and parallel to the hollow liquid spraying shaft for dispersing the centrifugal force of the rotating bed to avoid the irreversible deformation of the packing.

9. The high-gravity rotating bed according to claim 5, further comprising a liquid inlet pipe communicated with the hollow liquid spraying shaft, wherein a rotary sealing device is arranged between the liquid inlet pipe and the hollow liquid spraying shaft.

10. The high-gravity rotating bed according to claim 5, wherein the rotating bed body has an outer diameter of 800mm to 1200mm, an inner diameter of 100mm to 150mm, a thickness of 150mm to 200mm, and a rotating speed of 800 rpm to 1200 rpm; the weight of the dry bed is 30 kg-50 kg, the liquid spraying amount is 80L/min-120L/min, the weight of the wet bed is 100 kg-150 kg, and gas and liquid are exchanged in a 90-degree cross flow manner.