CN220633724U - Device for efficiently removing trace harmful gas in waste gas - Google Patents

Abstract

The application provides a device of trace harmful gas in high-efficient get rid of waste gas, including the mixing drum, be provided with crushing mechanism at the inboard middle part of mixing drum, crushing mechanism is including axis of rotation and multiunit different grade type's broken impeller and multiunit orifice plate, and the orifice plate is including movable orifice plate and fixed orifice plate. Through the structure, the gas can be crushed step by step, so that the gas is crushed in the form of tiny bubbles in the continuous migration process and then is updated and recombined, and the probability of contact between gas molecules to be cleaned in the gas and liquid is increased; and because a large number of crushing impellers and pore plates continuously stir and cut the violence of the gas-liquid mixture, the gas can exist for a long time in a micro-bubble mode as a whole, so that gas molecules to be cleaned in the micro-bubbles can be in contact with the liquid for a large area and a long time enough to perform a sufficient chemical reaction, and the trace harmful gas components in the tail gas are effectively and rapidly cleaned.

Description

Device for efficiently removing trace harmful gas in waste gas

Technical Field

The utility model relates to the technical field of tail gas treatment, in particular to a device for efficiently removing trace harmful gases in waste gas.

Background

In order to meet the severe requirements of environmental protection on the exhaust emission in the chemical industry, for example, toxic and harmful components in the exhaust are required to be removed, wherein a specific solution is utilized to remove the polluted components in the exhaust through wet absorption reaction, and the method is widely adopted in the chemical industry; however, the wet absorption mainly adopts a huge spray absorption packed tower, has the advantages of simple and convenient static mode, and the like, but has low space utilization efficiency, and is difficult to directly treat a plurality of pollutants to the extent that the pollutants meet the current severe standards.

The gas-liquid mixing pump used in the flotation industry can fully mix gas and liquid in a proper proportion, so that the contact area of the gas and the liquid is greatly increased, and the gas-liquid chemical reaction is facilitated. However, the ratio of the maximum gas volume to the liquid volume is only 1:9, namely, 9 volumes of liquid are required to be pumped for treating 1 volume of tail gas, so that the energy consumption is too high, and the normal tail gas treatment capacity can not be met; in addition, although the pump can meet the function of 'mixing' for a small amount of gas, the pump is difficult to meet the other required condition, namely the function of 'reaction', namely the time that the gas is fully mixed in the liquid is short, and the time required by the chemical reaction between all impurity gas molecules in the bubbles and the liquid is difficult to ensure because a single impeller in the pump can instantly crush the gas into the liquid to be mixed to form micro bubbles, but after the mixture instantly flows out of the pump body, the bubbles can quickly merge and escape and disappear, so that the time that the impurity gas molecules to be cleaned in the tail gas are contacted with the liquid is too short, the gas and the liquid are difficult to fully react, and the effect of cleaning harmful impurities in the gas is influenced, so that the device is difficult to be applied to common tail gas treatment practice.

Some reaction kettles used in chemical industry, which involve fully mixing and reacting gases with liquids to prepare new substances, are provided with mixing and stirring devices capable of rotating at high speed, but such preparation devices are not efficient if used for the treatment of tail gases thereof, because the substances which are usually required to be absorbed and reacted by such production devices are the main components of the gases entering the devices, and after almost complete absorption and reaction, the remaining reaction gases discharged with a small amount of tail gases are just so tiny amounts (including solvent vapor and impurity gases) that the devices are difficult to continue to react; unlike the main component gas absorbed by the production and preparation device, the main component of the tail gas treatment gas is usually air or nitrogen, and the harmful gas which is left after the steps of possible tail gas recycling and the like and is required to be absorbed by the reaction to reach the environmental protection and severe emission standard is only a trace component; and, unlike the case where the reaction preparation apparatus in production is a proper amount of gas entering apparatus but hardly discharges or discharges a small amount of gas (because the main component of the entering gas is the gas required to carry out the preparation reaction), the case of the off-gas treatment apparatus is generally a large amount of gas entering apparatus while almost the same amount of gas is continuously discharged in large amount (because the main component of the entering gas is the air or nitrogen which does not participate in the reaction), so that it is required to be much more efficient than the gas-liquid reaction apparatus for production preparation, and suitable for the gas-liquid mixing and reaction apparatus for treating the off-gas.

In addition, in some cases, trace components in the tail gas may form solid precipitates after reacting with a particular solution, and there is a need for a simple and effective method to control the increase in the content of these solid precipitates.

Disclosure of Invention

In order to solve the problems in the background technology, the utility model provides a device for efficiently removing trace harmful gases in waste gas.

According to the principle of wet absorption of tail gas, a large amount of tail gas can be continuously and directly introduced into the liquid channel, and the gas is continuously and continuously dispersed into small bubbles in the liquid for a long time by using mechanical strong high-speed stirring which is suitable for being absorbed by micro-components in a large amount of tail gas (different from being suitable for being absorbed by main components of gas in production and preparation), so that the contact area and the contact time of the gas and the liquid are increased, the mixed material continuously flows and fully reacts and reaches the outlet of the liquid channel, and a large amount of gas is continuously discharged, thereby achieving the aim of removing trace specific components in the tail gas.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the device for efficiently removing trace harmful gases in waste gas comprises a mixing cylinder, wherein an air inlet is formed in the left side of the top end of the mixing cylinder, an air outlet is formed in the right side of the top end of the mixing cylinder, a crushing mechanism is arranged in the middle of the inner side of the mixing cylinder and comprises a rotating shaft and a plurality of groups of crushing impellers of different types, the plurality of groups of crushing impellers are fixedly arranged on the outer surface of the rotating shaft, the rotating shaft is driven by a motor, and the motor is fixedly arranged in the middle of the right end of the mixing cylinder; one or more orifice plates are arranged between one or more crushing impellers at intervals among multiple groups of the crushing impellers, the orifice plates comprise movable orifice plates and fixed orifice plates, at least one group of the orifice plates is provided with a plurality of identical orifice plates which are together, and at least one group of the orifice plates is provided with two different orifice plates which are together.

Through the technical scheme, the air inlet can introduce the gas to be treated into the mixing drum filled with the specific absorption liquid, and then the motor drives the rotating shaft to rotate, so that the plurality of crushing impellers and the plurality of movable pore plates are driven to rotate at the middle part of the inner side of the mixing drum, the gas is subjected to violent crushing, the gas and the liquid are mixed and form small bubbles, the chemical reaction between the gas and the liquid is accelerated, the gas is rapidly cleared, trace harmful impurities are contained in the gas, and finally the treated gas can be discharged through the air outlet.

As a further improvement of the scheme, the movable orifice plate is fixedly arranged on the outer surface of the rotating shaft, the fixed orifice plate is fixedly arranged in the inner cavity of the mixing drum, and the rotating shaft penetrates through the shaft hole in the center of the fixed orifice plate to rotate and does not contact with the fixed orifice plate.

Through the technical scheme, the movable pore plate and the fixed pore plate can crush and uniformly filter the gas contained in the liquid.

As a further improvement of the scheme, the ratio of the length to the diameter of the mixing drum is required to be more than 5, and the number of the crushing impellers fixedly arranged on the outer surface of the rotating shaft is required to be more than 20 and distributed in a staggered manner.

As a further improvement of the scheme, a plurality of groups of bearings and the fixed-pore plates can support the rotating shaft.

Through above-mentioned technical scheme, select one or multiunit fixed orifice plate, can play spacing support's effect to the axis of rotation, avoid the axis of rotation to lead to the load too heavy because of installing a plurality of broken impellers, influence the stability of axis of rotation in the rotation in-process.

As a further improvement of the scheme, the periphery edge of the fixed orifice plate is provided with a circular ring, the circular ring is positioned on the inner side of the mixing drum, a plurality of groups of fixing holes are respectively formed in the corresponding positions of the mixing drum and the circular ring, a plurality of groups of nuts are welded on the inner side wall of the circular ring, the nuts are positioned at the tail ends of the fixing holes, the nuts are in threaded connection with fixing bolts, the fixing bolts are inserted into the middle part of the inner side of the fixing holes, and sealing rings are arranged between the fixing bolts and the fixing holes.

Through the technical scheme, the fixed bolt is connected with the nut, so that the fixed installation can be carried out on the position of the fixed orifice plate.

As a further improvement of the scheme, the bottom of the right end of the mixing drum is connected with at least one solid removing mechanism, the solid removing mechanism comprises a tank body and a soft filter bag arranged in the tank body, and the inlet end of the soft filter bag is communicated with the bottom of the right end of the mixing drum.

Through the technical scheme, the particle impurities in the liquid naturally fall into the tank body under the action of gravity near the communication port of the bottom of the right end of the mixing drum and the solid removing mechanism, and sediment is deposited in the soft filter bag in the tank body.

As a further improvement of the scheme, a sealing cover is arranged in the middle of the upper end of the mixing cylinder, and the sealing cover is in sealing connection with the mixing cylinder.

Through above-mentioned technical scheme, open sealed lid, make things convenient for the staff to maintain the work to the spare part of mixing drum inside.

As a further improvement of the scheme, the outer wall of the mixing drum is wrapped with the heat insulation layer and the heating mechanism, and the air outlet is connected with the gas-liquid separation tank.

Through above-mentioned technical scheme, heating mechanism heats the heat preservation to the inside liquid of mixing drum, can accelerate the speed that liquid and gas carry out chemical reaction to accelerate and clear away harmful substance in the gas fast, the gas-liquid separation jar can separate gas and liquid after clearing away.

Compared with the prior art, the utility model has the beneficial effects that:

1. in the scheme, at least 20 crushing impellers of different types, a plurality of groups of fixed orifice plates and movable orifice plates are arranged in the middle of the inner side of the mixing drum, when gas to be treated is led into the mixing drum from an air inlet, the gas is driven by a motor, the plurality of groups of crushing impellers and the plurality of groups of the movable orifice plates can crush the gas step by step, so that the gas is crushed in the form of tiny bubbles in the continuous migration process and then updated and recombined, and the contact probability of gas molecules to be cleaned in the gas and liquid is increased; and because a large number of crushing impellers and pore plates continuously stir and cut the violence of the gas-liquid mixture, the gas can exist for a long time in a micro-bubble mode as a whole, so that gas molecules to be cleaned in the micro-bubbles can be in contact with the liquid for a large area and a long time enough to perform a sufficient chemical reaction, and the trace harmful gas components in the tail gas are effectively and rapidly cleaned.

2. In this scheme, through introducing movable orifice plate and fixed orifice plate cooperation a plurality of different grade type crushing impeller, can produce more complicated stirring mixing action, improve the work efficiency that gas-liquid mixed.

3. In this scheme, through multiunit orifice plate and multiunit movable orifice plate, can force and even strain the branch to gas, avoid bubble spontaneous combination in the liquid to become big group gas, this is because can see in the simulation test with transparent mixing section of thick bamboo wall, when the gas-liquid mixture in the mixing section of thick bamboo is by high-speed circumference stirring, the liquid of quality far away from gas is thrown to the passageway of section of thick bamboo wall, and the gas or the bubble of quality far away is then crowded to the passageway of deflection centre of a circle pivot, this just is unfavorable for gas-liquid mixing, therefore, the use of orifice plate just becomes very important, the orifice plate will be possible great air group definitely evenly distributed again for each broken impeller plays better effect when breaking gas.

4. In this scheme, through at the inboard middle part fixed mounting of mixing drum have multiunit fixed orifice plate to select the board core installation bearing of one or more fixed orifice plate, the bearing contacts with the axis of rotation, can play spacing effect that supports the axis of rotation, avoid the axis of rotation because a plurality of broken impellers of installation lead to the load too heavy, influence the stability of axis of rotation in the rotation process.

5. In this scheme, through being connected with at least one solid removal mechanism at the right-hand member bottom of mixing drum, solid removal mechanism is including the jar body and place in the internal soft filter bag of jar, when liquid inflow is in the jar body, granule impurity in the liquid can deposit and pile up in the internal soft filter bag of jar, when need clear away the granule impurity of precipitation in the internal side of jar, only need mention soft filter bag, alright clear away granule impurity from the jar body, avoid the excessive increase of granule precipitate in the mixing drum, avoid influencing the work efficiency of clear away tail gas.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is a schematic perspective view of the present utility model;

FIG. 3 is a schematic view of the structure of the orifice plate and the ring according to the present utility model;

FIG. 4 is a side cross-sectional view of a mixing drum fixedly connected with a circular ring in the present utility model;

fig. 5 is an enlarged view at a in the present utility model.

Main symbol description:

1. a mixing drum; 2. an air inlet; 3. an air outlet; 4. a rotating shaft; 5. a motor; 6. a crushing impeller; 7. a moving orifice plate; 8. a fixed orifice plate; 9. a circular ring; 10. a fixing hole; 11. a screw cap; 12. a fixing bolt; 13. sealing cover; 14. a tank body; 15. soft filter bags.

Detailed Description

The technical solution in the embodiment of the present application is to solve the above-mentioned problems of the background technology, and the overall thought is as follows.

Examples: referring to fig. 1-5, a device for efficiently removing trace harmful gases in exhaust gas in this embodiment includes a mixing drum 1, an air inlet 2 is provided on the left side of the top end of the mixing drum 1, an air outlet 3 is provided on the right side of the top end of the mixing drum 1, a crushing mechanism is provided in the middle of the inner side of the mixing drum 1, the crushing mechanism includes a rotating shaft 4, multiple groups of crushing impellers 6 and a perforated plate, the perforated plate includes a movable perforated plate 7 and a fixed perforated plate 8, the multiple groups of crushing impellers 6 are fixedly mounted on the outer surface of the rotating shaft 4, the multiple groups of crushing impellers 6 are all of different types, one or more perforated plates are provided between one or more crushing impellers 6 at intervals, a single-layer perforated plate or a multi-layer perforated plate can be selected as the perforated plate, at least one group of perforated plates is formed by a plurality of perforated plates of the same types, and at least one group of perforated plates of two different types are formed together.

The gas to be treated can be introduced into the mixing drum 1 filled with specific absorption liquid through the gas inlet 2, then the motor 5 drives the rotating shaft 4 to rotate, so that the crushing impellers 6 and the movable orifice plates 7 are driven to rotate at the middle part of the inner side of the mixing drum 1, the fixed orifice plates 8 are matched to finely cut and uniformly distribute large air masses, the gas is crushed violently, the gas and the liquid are mixed and form small bubbles, and the gas is crushed by the crushing impellers 6, the movable orifice plates 7 and the fixed orifice plates 8 at each stage continuously along with the movement of the mixture towards the gas outlet 3 of the mixing drum 1, and then the small bubbles are formed, so that the gas and the liquid are fully mixed and the chemical reaction is quickened, and the trace harmful impurities contained in the gas are rapidly removed.

Meanwhile, the tail end of the air outlet 3 is connected with a gas-liquid separation tank which is conventional mature equipment, the cleaned gas and liquid can be separated through the gas-liquid separation tank, the separated liquid is left in or flows back to the mixing drum 1 for recycling, and the separated gas which is treated is discharged from an outlet above the separation tank.

The movable pore plate 7 is fixedly arranged on the outer surface of the rotating shaft 4, the movable pore plate 7 is driven to rotate through the rotating shaft 4, gas contained in liquid can be crushed, filtered and uniformly distributed, the fixed pore plate 8 is fixedly arranged in the inner cavity of the mixing drum 1, the rotating shaft 4 penetrates through the shaft hole in the center of the fixed pore plate 8 to rotate and does not contact the fixed pore plate 8, and the gas contained in the liquid can be crushed, filtered and uniformly distributed through the fixed pore plate 8.

The ratio of the length to the diameter of the mixing drum 1 is required to be greater than 5, the number of the crushing impellers 6 fixedly mounted on the outer surface of the rotating shaft 4 is required to be greater than 20, the crushing impellers 6 are distributed in a staggered manner, the length of the mixing drum 1 is increased, the plurality of crushing impellers 6 are conveniently mounted in the middle of the inner side of the mixing drum 1, meanwhile, the liquid and the gas can be stirred and crushed for a plurality of times by additionally mounting at least 20 crushing impellers 6 of different types, and meanwhile, the time for chemical reaction between the gas and the liquid can be prolonged, so that the liquid and the gas can be fully reacted, and the efficiency for removing harmful impurities contained in the gas can be improved.

Wherein, select one or more fixed orifice plates 8 in multiunit fixed orifice plate 8, be provided with the bearing in board center department, the bearing contacts with axis of rotation 4, can play spacing support's effect to axis of rotation 4, avoids axis of rotation 4 because installation a plurality of broken impeller 6 leads to the load too heavy, influences axis of rotation 4 stability in the rotation in-process.

The edge all around of fixed orifice plate 8 is provided with ring 9, ring 9 is located the inboard of mixing drum 1, can carry out spacing fixed to the position of fixed orifice plate 8 through ring 9, ring 9 and mixing drum 1 are provided with multiunit fixed orifices 10 respectively in corresponding position, the fixed orifices 10 inside wall welding of ring 9 has multiunit nut 11, nut 11 is located the end of fixed orifices 10, nut 11 threaded connection has fixing bolt 12, be connected with nut 11 through fixing bolt 12, thereby can be with fixed mounting of fixed orifice plate 8 at the inboard appointed position of mixing drum 1, fixing bolt 12 is pegged graft at the inboard middle part of fixed orifices 10, be provided with the sealing washer between fixing bolt 12 and the fixed orifices 10, play sealed waterproof effect through the sealing washer, avoid the inside liquid seepage of mixing drum 1 to spill over along the gap department of fixed orifices 10.

The middle part of the upper end of the mixing drum 1 is provided with a sealing cover 13, the sealing cover 13 is in sealing connection with the mixing drum 1, and the sealing cover 13 is opened, so that a worker can conveniently maintain parts inside the mixing drum 1.

The right-hand member bottom of mixing drum 1 is connected with at least one solid removal mechanism, solid removal mechanism including jar body 14 and place in jar body 14 soft filter bag 15, soft filter bag 15's entrance point communicates with mixing drum 1's right-hand member bottom, when liquid inflow is in jar body 14, the granule impurity in the liquid can deposit and pile up in jar body 14 inboard, when need clear away the granule impurity of depositing in the jar body 14 inboard, only need mention soft filter bag 15, alright put forward the granule impurity from jar body 14 and clear away, avoid the granule precipitate to pile up into silt and cause the pollution to the liquid, lead to influencing the work efficiency of clear away the tail gas.

The outer wall parcel of mixing drum 1 has heat preservation and heating mechanism, and heating mechanism is prior art, heats the heat preservation to the inside liquid of mixing drum 1 through heating mechanism, can accelerate the speed that liquid and gas carry out chemical reaction to accelerate the quick clearance to the trace harmful substance in the gas.

The working principle of the utility model is as follows:

the gas to be treated is led into the mixing drum 1 from the gas inlet 2, when the gas enters the mixing drum 1 filled with specific absorption liquid, the gas is immediately crushed by the crushing impeller 6 which rotates rapidly at the first stage in a violent manner and is mixed with the liquid to form small bubbles, and when the mixture moves towards the gas outlet 3 continuously, the gas is crushed step by step through the crushing impellers 6 which rotate at different stages and the rotating movable orifice plate 7 or the non-rotating fixed orifice plate 8 which rotate at different speeds, so that the gas is crushed in the form of tiny bubbles in the continuous migration process and then is updated and recombined, and the contact probability of gas molecules to be cleaned in the gas and the liquid is increased; moreover, as a large number of crushing impellers 6 and pore plates continuously stir and cut the gas-liquid mixture in a violent manner, the gas can exist for a long time in a micro-bubble manner as a whole, so that gas molecules to be cleaned in the micro-bubbles can be in contact with the liquid for a large area and a long enough time to perform a sufficient chemical reaction, and thus, trace harmful gas components in the tail gas are effectively and rapidly cleaned.

After the cleaned gas-liquid mixture reaches the gas outlet 3, or part of the gas-liquid mixture enters the gas-liquid separation tank for gas-liquid separation, the separated liquid is left in the mixing drum 1 or flows back to the mixing drum for continuous utilization, and the separated gas after the treatment is discharged from the outlet in the gas-liquid separation tank.

Wherein, through selecting one or more fixed orifice plates 8, be provided with the bearing in board center department, can play spacing support's effect to axis of rotation 4, avoid axis of rotation 4 because installation a plurality of broken impeller 6 lead to the load too heavy, influence axis of rotation 4 stability in the rotation in-process.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims (7)

1. The device for efficiently removing trace harmful gases in waste gas comprises a mixing drum (1), wherein an air inlet (2) is formed in the left side of the top end of the mixing drum (1), an air outlet (3) is formed in the right side of the top end of the mixing drum (1), and the device is characterized in that a crushing mechanism is arranged in the middle of the inner side of the mixing drum (1), the crushing mechanism comprises a rotating shaft (4) and a plurality of groups of crushing impellers (6) of different types, the crushing impellers (6) are fixedly arranged on the outer surface of the rotating shaft (4), the rotating shaft (4) is driven by a motor (5), and the motor (5) is fixedly arranged in the middle of the right end of the mixing drum (1);

one or more pore plates are arranged between one or more crushing impellers (6) at intervals among the plurality of groups of crushing impellers (6), each pore plate comprises a movable pore plate (7) and a fixed pore plate (8), at least one group of pore plates is formed by a plurality of pore plates, and at least one group of pore plates is formed by two different pore plates;

the movable orifice plate (7) is fixedly arranged on the outer surface of the rotary shaft (4), the fixed orifice plate (8) is fixedly arranged in the inner cavity of the mixing drum (1), and the rotary shaft (4) penetrates through a shaft hole in the center of the fixed orifice plate (8) to rotate without contacting with the fixed orifice plate (8).

2. The device for efficiently removing trace amounts of harmful gases from exhaust gas according to claim 1, wherein the ratio of the length to the diameter of the mixing drum (1) is more than 5, and the number of the crushing impellers (6) fixedly arranged on the outer surface of the rotating shaft (4) is more than 20 and distributed in a staggered manner.

3. A device for efficient removal of micro-amounts of harmful gases from exhaust gases according to claim 2, characterized in that one or more of said sets of orifice plates (8) is/are selected, that bearings are arranged at the centre of the plate, which bearings are in contact with the rotating shaft (4), which bearings support the rotating shaft (4).

4. A device for efficiently removing trace harmful gases in waste gas according to claim 3, characterized in that the peripheral edge of the fixed orifice plate (8) is provided with a circular ring (9), the circular ring (9) is positioned at the inner side of the mixing drum (1), a plurality of groups of fixing holes (10) are respectively arranged at the corresponding positions of the mixing drum (1) and the circular ring (9), a plurality of groups of nuts (11) are welded on the inner side wall of the circular ring (9), the nuts (11) are positioned at the tail end of the fixing holes (10), the nuts (11) are in threaded connection with fixing bolts (12), the fixing bolts (12) are inserted into the middle part of the inner side of the fixing holes (10), and sealing rings are arranged between the fixing bolts (12) and the fixing holes (10).

5. The device for efficiently removing trace amounts of harmful gases from waste gas according to claim 4, wherein the right end bottom of the mixing drum (1) is connected with at least one solid removing mechanism, the solid removing mechanism comprises a tank body (14) and a soft filter bag (15) placed in the tank body (14), and the inlet end of the soft filter bag (15) is communicated with the right end bottom of the mixing drum (1).

6. The device for efficiently removing trace harmful gases in waste gas according to claim 5, wherein a sealing cover (13) is arranged in the middle of the upper end of the mixing drum (1), and the sealing cover (13) is in sealing connection with the mixing drum (1).

7. The device for efficiently removing trace amounts of harmful gases in waste gas according to claim 6, wherein the outer wall of the mixing drum (1) is wrapped with a heat insulation layer and a heating mechanism, and the air outlet (3) is connected with a gas-liquid separation tank.