CN220443507U - Flue gas absorber - Google Patents

Abstract

The flue gas absorber of the present utility model comprises: the first shell is provided with a first inlet and a first outlet, the first inlet is used for introducing flue gas, a solution tank is arranged in the first shell, and an absorption solution is contained in the solution tank; a second housing having a second inlet and a second outlet, the second inlet in communication with the first outlet, the second inlet positioned below the second outlet; the liquid dropping device can spray the absorption solution downwards, is arranged in the second shell and is positioned above the second inlet. Therefore, the flue gas absorber according to the utility model has the advantage of facilitating the purification, waste heat recovery and water recovery of flue gas.

Description

Flue gas absorber

Technical Field

The utility model relates to the technical field of flue gas purification, in particular to a flue gas absorber.

Background

The flue gas treatment device in the related art, such as wet desulfurization and the like, mainly utilizes mediums such as water, lime and the like to remove sulfur dioxide in flue gas, and because the high-temperature flue gas is in direct contact with the mediums, the moisture in the mediums is continuously evaporated while the sulfur dioxide is removed, so that the water content in the treated flue gas is high, a large amount of latent heat is contained, the flue gas is in a nearly saturated state, chimney corrosion is easily caused, and heat energy and water resource waste are caused. The solution dehumidification mode is to utilize a packing mode, namely, the solution and the flue gas are in reverse contact from the packing unit and are subjected to an absorption process, latent heat generated by the reaction is transferred into the solution, and after the solution flows out of the packing, the heat is transferred out through a heat exchange device. In the mode, the latent heat recovery process and the utilization process respectively occur in the absorber and the heat exchanger, and as the heat cannot be transferred in the absorber, the absorption process is affected by the increase of the temperature of the solution, so that the absorption efficiency is reduced, and the corrosion to the spraying device is stronger.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. To this end, embodiments of the present utility model provide a flue gas absorber.

The flue gas absorber of the embodiment of the utility model comprises:

the first shell is provided with a first inlet and a first outlet, the first inlet is used for introducing flue gas, a solution tank is arranged in the first shell, and an absorption solution is contained in the solution tank;

a second housing having a second inlet and a second outlet, the second inlet in communication with the first outlet, the second inlet positioned below the second outlet;

the liquid dropping device can spray the absorption solution downwards, is arranged in the second shell and is positioned above the second inlet.

Therefore, the flue gas absorber provided by the embodiment of the utility model has the advantages of convenient flue gas purification, waste heat recovery and water recycling.

In some embodiments, a first gas-liquid separator is disposed in the second housing, the first gas-liquid separator is located between the liquid dropping device and the second outlet in the up-down direction, the periphery of the first gas-liquid separator is connected with the inner wall surface of the second housing and divides the second housing into two cavities, and the flue gas can pass through the first gas-liquid separator and is led into the second outlet.

In some embodiments, the dropping device comprises a plurality of dropping pipes and a plurality of falling film pipes positioned below the dropping pipes, the plurality of dropping pipes are in one-to-one correspondence with the plurality of falling film pipes, the dropping pipes are provided with a plurality of dropping ports facing downwards, the absorption solution in the dropping pipes can flow to the corresponding falling film pipes through the dropping ports, and each falling film pipe is provided with a cooling water inlet and a cooling water outlet which extend out of the second shell.

In some embodiments, the plurality of falling film pipes are arranged at intervals along a first horizontal direction, each falling film pipe comprises a plurality of horizontal pipes which are arranged at intervals along a second horizontal direction, two adjacent horizontal pipes in the upper and lower directions are connected through a bent pipe, the cooling water inlet of each falling film pipe is positioned above the cooling water outlet, and the first horizontal direction is perpendicular to the second horizontal direction.

In some embodiments, a plurality of second gas-liquid separators are disposed in the first housing, the first housing has a plurality of first inlets, a plurality of second gas-liquid separators are disposed at the bottom of the solution tank, the plurality of second gas-liquid separators are in one-to-one correspondence with the plurality of first inlets, and flue gas can be introduced into the solution tank through the second gas-liquid separators.

The flue gas absorber of the embodiment of the utility model further comprises

The third shell is provided with a third inlet, a third outlet and a fourth outlet, wherein the third inlet is used for introducing flue gas, the third outlet is communicated with the first inlet, and the fourth outlet is used for discharging liquid;

the spraying device is positioned in the third shell and is provided with a plurality of spray heads, the spray heads are used for spraying liquid, and the spray heads are positioned above the third inlet.

In some embodiments, the third housing, the first housing, and the second housing are disposed in order from bottom to top.

In some embodiments, the top of the first housing is in communication with the bottom of the second housing, the top of the peripheral side housing of the first housing is connected to the peripheral side housing bottom of the second housing, and the bottom housing of the first housing is the same housing as the top housing of the third housing.

The flue gas absorber of the embodiment of the utility model further comprises

The inlet of the first pipeline is communicated with the bottom of the solution tank;

the outlet of the second pipeline is communicated with the liquid dropping pipe;

the liquid concentration device is used for improving the concentration of the absorption solution, an inlet of the liquid concentration device is communicated with an inlet of the first pipeline, and an outlet of the liquid concentration device is communicated with an inlet of the second pipeline.

The flue gas absorber of the embodiment of the utility model further comprises a heat exchange device, wherein a part of the second pipeline and a part of the first pipeline are positioned in the heat exchange device so that the first pipeline and the second pipeline can exchange heat.

Drawings

Fig. 1 is a schematic view of a flue gas absorber according to an embodiment of the utility model.

Reference numerals:

a flue gas absorber 100;

a first housing 1, a first inlet 11, a solution tank 12;

a second housing 2, a second outlet 21;

a first gas-liquid separator 31, a second gas-liquid separator 32;

a drip tube 41, a falling film tube 42, a horizontal tube 43, and a bent tube 44;

a third housing 5, a third inlet 51, a fourth outlet 52;

a spray device 6, a spray head 61;

a first line 71, a second line 72, a heat exchange device 73.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

The flue gas absorber 100 according to an embodiment of the present utility model is described below with reference to the accompanying drawings. As shown in fig. 1, a flue gas absorber 100 according to an embodiment of the present utility model includes a first housing 1, a second housing 2, and a drip device.

The first shell 1 is provided with a first inlet 11 and a first outlet, the first inlet 11 is used for introducing flue gas, a solution tank 12 is arranged in the first shell 1, and an absorption solution is contained in the solution tank 12. The second housing 2 has a second inlet communicating with the first outlet and a second outlet 21 below the second outlet 21. The liquid dropping device can spray the absorption solution downwards, and is arranged in the second shell 2 and is positioned above the second inlet. The up-down direction is shown by the arrow in the figure.

After the flue gas is introduced into the first housing 1 through the first inlet 11, the flue gas can enter the solution tank 12, and the absorption solution in the solution tank 12 can absorb a large amount of water vapor in the flue gas so as to cool the flue gas. The cooled flue gas is discharged from the first outlet and then introduced into the second housing 12 through the second inlet. The flue gas entering the second housing 12 can be sprayed by the absorption solution sprayed by the dropping device, thereby further reducing the temperature of the flue gas and further improving the cleanliness of the flue gas. Thereby the flue gas discharged by the second outlet 21 is clean and low-temperature flue gas, and the corrosion risk to the subsequent chimney is greatly reduced.

Accordingly, the flue gas absorber 100 according to the embodiment of the present utility model has advantages of convenient purification of flue gas, waste heat recovery and water recovery.

As shown in fig. 1, in some embodiments, a first gas-liquid separator 31 is disposed in the second housing 2, the first gas-liquid separator 31 is located between the dropping device and the second outlet 21 in the up-down direction, the peripheral side of the first gas-liquid separator is connected to the inner wall surface of the second housing 2 and divides the second housing 2 into two cavities, and the flue gas can pass through the first gas-liquid separator 31 and pass into the second outlet 21. Thus, the flue gas can be made to pass through the first gas-liquid separator 31 and enter the second outlet 21, and the moisture in the flue gas is less.

As shown in fig. 1, in some embodiments, the drip apparatus includes a drip tube 41 and a drop film tube 42 located below the drip tube 41, the drip tube 41 and the drop film tube 42 are plural, the plurality of drip tubes 41 are in one-to-one correspondence with the plurality of drop film tubes 42, the drip tube 41 has a plurality of drip ports facing downward, and the absorption solution in the drip tube 41 can flow to the respective drop film tube 42 through the drip ports, and each drop film tube 42 has a cooling water inlet and a cooling water outlet that extend out of the second housing 2. In the process of dropping the absorption solution downward from the dropping pipe 41, the absorption solution flows down in a film shape after flowing through the falling film pipe 42, and is cooled by the cooling water in the falling film pipe 42. After the flue gas containing the water vapor is introduced into the second shell 2, the flue gas is contacted with the absorption solution which flows down in a film shape and is cooled, so that the absorption solution absorbs the water vapor in the flue gas. For example, the drip tube 41 is provided at the upper portion of the second housing 2, and the second outlet 21 is located at the top of the second housing 2.

As shown in fig. 1, in some embodiments, a plurality of falling film pipes 42 are disposed at intervals along a first horizontal direction, each falling film pipe 42 includes a plurality of horizontal pipes 43 disposed at intervals in an up-down direction, the horizontal pipes 43 extend along a second horizontal direction, two adjacent horizontal pipes 43 in the up-down direction are connected by a bent pipe 44, a cooling water inlet of each falling film pipe 42 is located above a cooling water outlet, and the first horizontal direction is perpendicular to the second horizontal direction. Thereby, the absorption solution can be kept in a film shape continuously during the process of passing through the plurality of horizontal tubes 43, so that the water vapor in the flue gas can be contacted with the cooled absorption solution. The first horizontal direction may be a front-rear direction, and the second horizontal direction may be a left-right direction. For example, a plurality of falling film pipes 42 are provided at intervals in the front-rear direction, and a horizontal pipe 43 extends in the left-right direction. The cooling water inlet is connected to the uppermost horizontal pipe 43, and the cooling water outlet is connected to the lowermost horizontal pipe 43.

As shown in fig. 1, in some embodiments, a plurality of second gas-liquid separators 32 are disposed in the first casing 1, the first casing 1 has a plurality of first inlets 11, the plurality of second gas-liquid separators 32 are disposed at the bottom of the solution tank 12, the plurality of second gas-liquid separators 32 are in one-to-one correspondence with the plurality of first inlets 11, and the flue gas can be introduced into the solution tank 12 through the second gas-liquid separators 32. Specifically, the second gas-liquid separators 32 are plural and provided on the upper surface of the bottom casing of the first casing 1. So that flue gas containing a large amount of water vapor can pass through the bottom shell of the first shell 1 and directly enter the solution tank 12 to be contacted with the absorption solution through the second gas-liquid separator 32. For example, the second gas-liquid separator 32 is a flue gas inlet valve.

As shown in fig. 1, in some embodiments, the flue gas absorber 100 further comprises a third housing 5 and a spray device 6.

The third housing 5 has a third inlet 51 for letting in flue gas, a third outlet communicating with the first inlet 11, and a fourth outlet 52 for discharging liquid. The spraying device 6 is located in the third housing 5, the spraying device 6 having a plurality of spray heads 61, the spray heads 61 being for spraying the liquid, the plurality of spray heads 61 being located above the third inlet 51.

Specifically, the liquid (water) discharged from the nozzle 61 is in the form of mist or drops, and contacts the flue gas in a reverse direction. The fourth outlet 52, the third inlet 51 and the third outlet are arranged in this order from bottom to top. The shower device 6 is provided between the third inlet 51 and the third outlet in the up-down direction. For example, the spraying device 6 is a plurality of spraying pipes, the spraying pipes are arranged at intervals along the horizontal direction, and the third outlet is arranged at the top of the third shell. That is, the flue gas is first introduced into the third housing 5, and after the flue gas is introduced into the third housing 5, the nozzle 61 can spray out liquid (water), so that after the flue gas containing water vapor, sulfur dioxide and particulate matters contacts with the liquid, the liquid can absorb the sulfur dioxide and particulate matters in the flue gas and part of sensible heat, thereby reducing the sulfur dioxide and particulate matters in the flue gas, and the sulfur dioxide and particulate matters can be discharged out of the third housing 5 along with the liquid from the four outlets 52. The flue gas containing a large amount of water vapor can be discharged through the third outlet and introduced into the first inlet 11, namely, the third shell 5 can be used for absorbing sulfur dioxide, particulate matters and part of water vapor in the flue gas, so that the cleanliness of the flue gas entering the first shell 1 is high.

As shown in fig. 1, in some embodiments, the third housing 5, the first housing 1, and the second housing 2 are disposed in order from bottom to top. Thereby, the smoke can be facilitated to pass through the third housing 5, the first housing 1 and the second housing 2 in sequence.

As shown in fig. 1, in some embodiments, the top of the first housing 1 communicates with the bottom of the second housing 2, the top of the peripheral side housing of the first housing 1 is connected with the bottom of the peripheral side housing of the second housing 2, and the bottom housing of the first housing 1 is the same housing as the top housing of the third housing 5. That is, the first casing 1 and the second casing 2 are formed as the same outer casing, the lower part of the outer casing forms the first casing 1, and the upper part of the outer casing forms the second casing 2. So that the absorption solution dropped in the second housing 2 can directly enter the solution tank 12 of the first housing 1.

As shown in fig. 1, in some embodiments, the flue gas absorber 100 further comprises a first conduit 71, a second conduit 72, a liquid concentrating device, and a heat exchange device 73.

The inlet of the first line 71 communicates with the bottom of the solution tank 12. The outlet of the second pipe 72 communicates with the drip tube 41. The liquid concentration device is used for increasing the concentration of the absorption solution, the inlet of the liquid concentration device is communicated with the inlet of the first pipeline 71, and the outlet of the liquid concentration device is communicated with the inlet of the second pipeline 72. Specifically, the liquid concentrating device increases the concentration of the absorption solution by heating. The purified absorption solution can be introduced into the drip tube 41 again through the second pipeline 72 so as to recycle the absorption solution and reduce the cost.

A portion of the second conduit 72 and a portion of the first conduit 71 are positioned within the heat exchange device 73 such that the first conduit 71 and the second conduit 72 can exchange heat. Specifically, the temperature of the absorption solution coming out of the first pipeline 71 is reduced, the temperature of the absorption solution in the purified second pipeline 72 is higher, and the absorption solution in the first pipeline 71 and the absorption solution in the second pipeline 72 exchange heat through the heat exchange device 73, so that the absorption solution in the first pipeline 71 can be preheated, so that the energy consumption of the liquid concentration device is reduced.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims (9)

1. A flue gas absorber, comprising:

the first shell is provided with a first inlet and a first outlet, the first inlet is used for introducing flue gas, a solution tank is arranged in the first shell, and an absorption solution is contained in the solution tank;

a second housing having a second inlet and a second outlet, the second inlet in communication with the first outlet, the second inlet positioned below the second outlet;

the liquid dropping device can spray the absorption solution downwards, is arranged in the second shell and is positioned above the second inlet;

the dropping device comprises a dropping pipe and a plurality of falling film pipes arranged below the dropping pipe, wherein the dropping pipes are in one-to-one correspondence with the falling film pipes, the dropping pipe is provided with a plurality of dropping openings facing downwards, the absorption solution in the dropping pipe can flow to the corresponding falling film pipes through the dropping openings, and each falling film pipe is provided with a cooling water inlet and a cooling water outlet which extend out of the second shell.

2. The flue gas absorber according to claim 1, wherein a first gas-liquid separator is disposed in the second housing, the first gas-liquid separator is located between the dropping device and the second outlet in the up-down direction, a peripheral side of the first gas-liquid separator is connected with an inner wall surface of the second housing and divides the second housing into two cavities, and flue gas can pass through the first gas-liquid separator and be introduced into the second outlet.

3. The flue gas absorber of claim 1 wherein a plurality of said falling film tubes are disposed at intervals along a first horizontal direction, each of said falling film tubes comprising a plurality of horizontal tubes disposed at intervals in an up-down direction, said horizontal tubes extending along a second horizontal direction, two adjacent horizontal tubes in the up-down direction being connected by a bent tube, said cooling water inlet of each of said falling film tubes being located above said cooling water outlet, said first horizontal direction being perpendicular to said second horizontal direction.

4. A flue gas absorber according to any one of claims 1 to 3, wherein a plurality of second gas-liquid separators are provided in the first housing, the first housing has a plurality of first inlets, the plurality of second gas-liquid separators are provided at the bottom of the solution tank, the plurality of second gas-liquid separators are in one-to-one correspondence with the plurality of first inlets, and flue gas can be introduced into the solution tank through the second gas-liquid separators.

5. The flue gas absorber of claim 4 further comprising

The third shell is provided with a third inlet, a third outlet and a fourth outlet, wherein the third inlet is used for introducing flue gas, the third outlet is communicated with the first inlet, and the fourth outlet is used for discharging liquid;

the spraying device is positioned in the third shell and is provided with a plurality of spray heads, the spray heads are used for spraying liquid, and the spray heads are positioned above the third inlet.

6. The flue gas absorber of claim 5 wherein the third housing, the first housing and the second housing are disposed in sequence from bottom to top.

7. The flue gas absorber of claim 6 wherein the top of the first housing communicates with the bottom of the second housing, the top of the peripheral side housing of the first housing is connected to the peripheral side housing bottom of the second housing, and the bottom housing of the first housing is the same housing as the top housing of the third housing.

8. The flue gas absorber of claim 7 further comprising

The inlet of the first pipeline is communicated with the bottom of the solution tank;

the outlet of the second pipeline is communicated with the liquid dropping pipe;

the liquid concentration device is used for improving the concentration of the absorption solution, an inlet of the liquid concentration device is communicated with an inlet of the first pipeline, and an outlet of the liquid concentration device is communicated with an inlet of the second pipeline.

9. The flue gas absorber of claim 8 further comprising a heat exchange device, a portion of the second conduit and a portion of the first conduit being positioned within the heat exchange device such that the first conduit is heat exchangeable with the second conduit.