Eluting and eluting integrated desulfurizing tower

Abstract

The utility model discloses an elution integrated desulfurizing tower, which belongs to the technical field of desulfurizing equipment and comprises a tower body, a coal gas inlet is arranged on the lower portion of the tower body, a coal gas outlet is arranged on the upper portion of the tower body, and an initial liquid distributor and a liquid inlet sprayer which are vertically distributed at intervals are arranged above the coal gas inlet in the tower body. The initial liquid distributor is positioned above the coal gas outlet and is used for spraying the desulfurization liquid from top to bottom, and the liquid inlet sprayer is used for spraying the desulfurization liquid from bottom to top. The initial liquid distributor and the liquid inlet sprayer which are opposite in spraying direction are arranged in the tower body, so that the contact time between the desulfurizing liquid and the coal gas can be further prolonged, the desulfurizing liquid and the coal gas are fully reacted, and the desulfurizing efficiency of the desulfurizing tower is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization equipment, and more specifically, to an integrated elution desulfurization tower. Background Art

[0002] The desulfurization tower is an important device for removing harmful substances such as hydrogen sulfide (H2S) in coal gas during industrial production. In traditional desulfurization technologies, wet desulfurization technologies are mainly adopted, and by contacting the sulfur-containing coal gas with the desulfurizer slurry, the absorption and removal of H2S are realized.

[0003] In order to improve the desulfurization efficiency of raw coal gas, researchers in this field have continuously explored new desulfurization technologies and equipment structures. In addition, with increasingly strict environmental protection requirements, it continuously promotes the improvement of the performance of desulfurization towers. Future desulfurization tower technologies will pay more attention to high-efficiency desulfurization and reduce pollutant emissions.

[0004] For example, the application case with the Chinese patent application number 2019218148321 discloses a combined desulfurization device for pre-desulfurization of semi-coke oven gas, which includes an impact reactor and a desulfurization tower; the inlet of the impact reactor is connected with an input pipeline for inputting the semi-coke oven gas to be treated; the liquid inlet of the impact reactor is used for introducing the desulfurization liquid for pretreatment; the outlet of the impact reactor is communicated with the inlet of the desulfurization tower; between the inlet and the outlet of the desulfurization tower, a packing layer, a liquid distributor and a mist eliminator are sequentially arranged along the flow direction of the semi-coke oven gas; the liquid inlet of the desulfurization tower is communicated with the liquid distributor for introducing the lean desulfurization liquid; the liquid outlet of the desulfurization tower is used for discharging the rich desulfurization liquid after the desulfurization reaction; the outlet of the desulfurization tower is connected with an output pipeline for discharging the desulfurized and purified semi-coke oven gas. In this application, through the setting of the impact reactor, to a certain extent, the desulfurization liquid can be fully contacted with the coal gas, but its desulfurization effect still needs to be further improved, and the overall equipment occupies a large space and the cost is relatively high. Summary of the Utility Model

[0005] Aiming at the technical problem that the desulfurization efficiency of the existing desulfurization tower needs to be further improved, the utility model provides an integrated elution desulfurization tower. By arranging an initial liquid distributor and a liquid inlet sprayer with opposite spray directions in the tower body, the contact time between the desulfurization liquid and the coal gas can be further increased, enabling them to fully contact and react, thereby improving the desulfurization efficiency of the desulfurization tower.

[0006] To achieve the above object, the technical solution provided by the utility model is as follows:

[0007] An integrated elution desulfurization tower of the utility model includes a tower body. A gas inlet is provided at the lower part of the tower body, and a gas outlet is provided at the upper part of the tower body. An initial liquid distributor and a liquid inlet sprayer are arranged at intervals up and down above the gas inlet in the tower body. The initial liquid distributor is located below the gas outlet, and the initial liquid distributor is used for spraying desulfurization liquid from top to bottom, and the liquid inlet sprayer is used for spraying desulfurization liquid from bottom to top.

[0008] Further, a liquid outlet is provided at the bottom of the tower body. The liquid outlet is connected to a regeneration tank assembly through a pipeline. The red liquid outlets of the regeneration tank assembly are respectively connected to the initial liquid distributor and the liquid inlet sprayer.

[0009] Further, the regeneration tank assembly is located at the top of the tower body.

[0010] Further, the red liquid outlet of the regeneration tank assembly is connected to the initial liquid distributor through a main desulfurization liquid pipe, and the main desulfurization liquid pipe is further connected to the liquid inlet sprayer through a branch desulfurization liquid pipe.

[0011] Further, the main desulfurization liquid pipe is a U-shaped pipeline, and the branch desulfurization liquid pipe is connected to the elbow of the U-shaped pipeline.

[0012] Further, a plurality of packing layers are arranged at intervals up and down in the tower body and a liquid redistributor for distributing the desulfurization liquid is provided. The plurality of packing layers are located between the initial liquid distributor and the liquid inlet sprayer.

[0013] Further, the liquid redistributor is located between two packing layers.

[0014] Further, the packing layer adopts structured packing.

[0015] Further, a gas-liquid distributor is provided between the lowermost packing layer and the liquid inlet sprayer. The gas-liquid distributor is evenly provided with riser pipes, and a circle of guide pipes spaced along the circumferential direction of the tower body is provided at its edge.

[0016] Further, the gas-liquid distributor includes a plurality of strip-shaped gas-liquid distribution units densely paved in parallel and a plurality of support rods arranged in parallel at intervals for supporting the gas-liquid distribution units. The two ends of the support rods are fixed on the inner wall of the tower body. The gas-liquid distribution units are evenly provided with riser pipes, and guide pipes are opened at both ends of the gas-liquid distribution units close to the inner wall of the tower body.

[0017] Adopting the technical solution provided by the utility model, compared with the prior art, the following beneficial effects are obtained:

[0018] (1) The utility model optimizes the design of the spray mechanism in the tower body and designs an initial liquid distributor and a liquid inlet sprayer with opposite spraying directions. The spraying direction of the liquid inlet sprayer is the same as the direction of the coal gas movement. The desulfurization liquid sprayed by the liquid inlet sprayer is affected by gravity and begins to descend after rising a certain distance, forming a countercurrent contact with the ascending coal gas to perform desulfurization pretreatment on the coal gas. The spraying direction design of the liquid inlet sprayer makes the contact distance between the desulfurization liquid and the coal gas longer, which is beneficial to improving the desulfurization efficiency. At the same time, the initial liquid distributor sprays the desulfurization liquid from top to bottom, and the ascending coal gas contacts the desulfurization liquid again, further improving the desulfurization effect.

[0019] (2) The utility model is provided with multiple packing layers, and liquid redistributors are arranged between the packing layers, which is conducive to further extending the reaction time of the coal gas in the tower and allowing the desulfurization liquid to fall evenly on the packing layers, thereby improving the utilization rate of the desulfurization liquid and further improving the desulfurization efficiency of the desulfurization tower.

[0020] (3) The utility model optimizes the design of the gas-liquid distributor, and the gas-liquid distributor is provided with a gas riser for gas to pass through and a flow guide for desulfurization liquid to pass through. The desulfurization liquid sprayed by the initial liquid distributor contacts and reacts with the coal gas in the packing layer. When it reaches the gas-liquid distributor below, the effective components in the desulfurization liquid are almost completely consumed by the reaction, and only fall from the flow guide at the edge of the gas-liquid distributor into the rich liquid collection area at the bottom of the tower, without contacting the ascending coal gas over a large area, thereby effectively reducing the water content of the coal gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the elution-integrated desulfurization tower in an embodiment of the utility model.

[0022] Figure 2 It is a top view schematic diagram of the local structure of the gas-liquid distributor in the embodiment of the utility model.

[0023] Figure 3 It is a cross-sectional schematic diagram of the local structure of the gas-liquid distributor in the embodiment of the utility model.

[0024] Description of labels:

[0025] 1. Liquid inlet sprayer;

[0026] 2. Initial liquid distributor;

[0027] 3. Gas-liquid distributor; 301. flow guide pipe; 302. gas riser;

[0028] 4. Filling layer;

[0029] 5. Liquid redistributor;

[0030] 6. Desulfurization liquid main pipe;

[0031] 7. Desulfurization liquid branch pipe;

[0032] 8. Mist-catching layer;

[0033] 9. Regeneration tank assembly;

[0034] 10. Gas inlet;

[0035] 11. Gas outlet. Specific implementation manners

[0036] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of this application here.

[0038] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0039] This embodiment provides an integrated elution and desulfurization tower, as Figure 1As shown in the figure, it includes a tower body. A gas inlet 10 is provided at the lower part of the tower body, and a gas outlet 11 is provided at the upper part thereof. Inside the tower body, an initial liquid distributor 2 and a liquid inlet sprayer 1 are arranged at intervals from top to bottom above the gas inlet 10. The initial liquid distributor 2 is located below the gas outlet 11, and the initial liquid distributor 2 is used to spray the desulfurization liquid from top to bottom, and the liquid inlet sprayer 1 is used to spray the desulfurization liquid from bottom to top. A mist-catching layer 8 is arranged inside the tower body and between the initial liquid distributor 2 and the gas outlet 11, and is used to remove the liquid in the desulfurized gas.

[0040] In this embodiment, the initial liquid distributor 2 and the liquid inlet sprayer 1 with opposite spraying directions are adopted. The spraying direction of the liquid inlet sprayer 1 is the same as the moving direction of the gas. The desulfurization liquid sprayed by the liquid inlet sprayer 1 is affected by gravity and starts to move downward after rising a certain distance, forming a countercurrent contact with the upward-moving gas, and performing desulfurization pretreatment on the gas. The optimized design of the spraying direction of the liquid inlet sprayer 1 makes the contact stroke between the desulfurization liquid and the gas longer, increases the contact time between the desulfurization liquid and the gas, enables them to fully react, and thus improves the desulfurization efficiency of the desulfurization tower. At the same time, the initial liquid distributor 2 sprays the desulfurization liquid from top to bottom, and the upward-moving gas contacts the desulfurization liquid again, further improving the desulfurization effect, enabling the desulfurization tower to achieve a better desulfurization effect under the same diameter, and reducing the land occupation cost and equipment cost. A plurality of nozzles are evenly distributed on both the initial liquid distributor 2 and the liquid inlet sprayer 1, thereby improving the uniformity of spraying.

[0041] As Figure 1 shown in the figure, a liquid outlet is provided at the bottom of the tower body. After the desulfurization liquid reacts with the gas, it drips to the bottom of the tower body under the influence of gravity, and the desulfurized rich liquid flows out from the liquid outlet at the bottom of the tower body. The liquid outlet is connected to a regeneration tank assembly 9 through a pipeline. The regeneration tank assembly 9 regenerates the desulfurized rich liquid into desulfurized red liquid. The raw materials, equipment, and reaction principle required for the regeneration process are all existing technologies and will not be described herein. The red liquid outlet of the regeneration tank assembly 9 is connected to the initial liquid distributor 2 and the liquid inlet sprayer 1 through pipelines respectively, so that the desulfurized red liquid of the regeneration tank assembly 9 flows into the initial liquid distributor 2 and the liquid inlet sprayer 1.

[0042] As a preferred implementation mode of this example, the regeneration tank assembly 9 is located at the top of the tower body to improve the integration of the desulfurization tower and reduce the equipment occupation area.

[0043] Specifically, the red liquid outlet of the regeneration tank assembly 9 is connected to one end of a desulfurization liquid main pipe 6 located on the outer wall of the tower body, and the liquid inlet of the initial liquid distributor 2 is connected to the other end of the desulfurization liquid main pipe 6, so that the desulfurized red liquid flows from the regeneration tank assembly 9 through the desulfurization main pipe 6 into the initial liquid distributor 2.

[0044] More specifically, the main desulfurization liquid pipe 6 is provided with another outlet end and is connected to one end of the desulfurization liquid branch pipe 7, and the other end of the desulfurization liquid branch pipe 7 is connected to the liquid inlet of the liquid inlet sprayer 1. Preferably, the main desulfurization liquid pipe 6 is designed as a U-shaped bend, and the desulfurization liquid branch pipe 7 is connected to the elbow of the U-shaped pipe, so that the desulfurized red liquid enters the liquid inlet sprayer 1 from the main desulfurization liquid pipe 6 through the desulfurization liquid branch pipe 7.

[0045] In some embodiments, in order to improve the utilization efficiency of the desulfurization liquid sprayed by the initial liquid distributor 2, a plurality of packing layers 4 are arranged at intervals up and down in the tower body, and the plurality of packing layers 4 are located between the initial liquid distributor 2 and the liquid inlet sprayer 1. In the above embodiments, by arranging the packing layer 4, the contact area and time between the desulfurization liquid and the gas can be increased. Further, a liquid redistributor 5 for distributing the desulfurization liquid is further included, and by arranging the liquid redistributor 5, the desulfurization liquid can be evenly dropped into the packing layer 4.

[0046] Further preferably, the liquid redistributor 5 is located between two packing layers 4 and is arranged close to the lower packing layer 4. That is, except for the uppermost packing layer 4, the liquid redistributor 5 is arranged above the remaining packing layers 4, so that the desulfurization liquid can be evenly dropped into each packing layer 4. In some embodiments, three packing layers 4 are arranged, and the liquid redistributor 5 is arranged above each adjacent two packing layers 4. The desulfurization liquid sprayed by the initial liquid distributor 2 falls onto the uppermost packing layer 4 in the tower, and the desulfurization liquid dripping from the uppermost packing layer 4 falls into the two lower packing layers 4 in sequence through the liquid redistributor 5.

[0047] In order to further increase the contact area and time between the desulfurization liquid and the gas, the packing layer 4 is further preferably a structured packing. On the one hand, compared with conventional dumped packings such as cascade rings, the structured packing has a larger specific surface area and porosity, and the pressure drop ratio is reduced by 75%-80%. The desulfurization liquid and the gas are more evenly distributed in the structured packing, further improving the desulfurization efficiency; on the other hand, the structured packing has 20,000 connection points per cubic meter, is safe and environmentally friendly, the packing blocks are regular and uniform, have high strength, are integral and firm, and will not settle. The working environment is between -20 and 80 °C, and the limit can reach 130 °C. It can work in a more severe environment compared with other dumped packings.

[0048] As a further preferred solution of any of the above embodiments, a gas-liquid distributor 3 is provided between the packing layer 4 at the bottommost layer and the liquid inlet sprayer 1. The gas-liquid distributor 3 is evenly provided with riser pipes 302, and a circle of diversion pipes 301 spaced circumferentially along its circumference is provided at its edge. On the one hand, the gas enters the tower body through the gas inlet 10 and ascends. After reacting with the desulfurization liquid sprayed by the liquid inlet sprayer 1, it uniformly flows upward through the riser pipes 302 of the gas-liquid distributor 3. On the other hand, the desulfurization liquid sprayed by the initial liquid distributor 2 reacts with the gas in the packing layer 4. When it reaches the gas-liquid distributor 3 below, the effective components in the desulfurization liquid are almost completely consumed by the reaction. The desulfurization liquid falling from above can only fall into the rich liquid collection area at the bottom of the tower through the diversion pipes 301 at the edge of the gas-liquid distributor 3 and does not come into large-area contact with the ascending gas, reducing the moisture content of the gas.

[0049] Specifically, as Figure 2 shown, as one implementation manner, the gas-liquid distributor 3 includes a plurality of strip-shaped gas-liquid distribution units densely paved in parallel and a plurality of support rods arranged in parallel and spaced apart for supporting the gas-liquid distribution units. The two ends of the support rods are fixed on the inner wall of the tower body. The gas-liquid distribution units are evenly provided with riser pipes 302, and diversion pipes 301 are opened at the edges of the gas-liquid distribution units close to the inner wall of the tower body. Figure 2 In order to facilitate seeing the specific structure of the gas-liquid distribution unit, only one gas-liquid distribution unit is shown. Diversion pipes 301 are opened at both ends of the gas-liquid distribution unit. The specific process of this device is as follows: The gas enters the tower body through the gas inlet 10, contacts the desulfurization liquid sprayed by the liquid inlet sprayer 1 in the same direction, and contacts the descending desulfurization liquid in the reverse direction. The gas continuing to ascend contacts the desulfurization liquid sprayed by the initial liquid distributor 2. In some embodiments, the gas continuing to ascend contacts the desulfurization liquid sprayed by the initial liquid distributor 2 in the packing layer 4, and the liquid in the gas is absorbed by the mist-catching layer 11 and flows out through the gas outlet 11 into the subsequent equipment. After reacting with the gas, the desulfurization liquid flows into the rich liquid collection area at the bottom of the tower body and flows into the regeneration tank assembly 9 through a pipeline for desulfurization liquid regeneration.

[0050] The above schematically describes the present invention and its embodiments. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural forms and embodiments without creative work without departing from the creative purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. An integrated desulfurization and elution tower, comprising a tower body, a gas inlet (10) is provided at the lower part of the tower body, and a gas outlet (11) is provided at the upper part thereof, characterized in that, Above the gas inlet (10) in the tower body, an initial liquid distributor (2) and a liquid inlet sprayer (1) are provided at intervals up and down. The initial liquid distributor (2) is located below the gas outlet (11), and the initial liquid distributor (2) is used to spray the desulfurization liquid from top to bottom, and the liquid inlet sprayer (1) is used to spray the desulfurization liquid from bottom to top.

2. The integrated elution desulfurization tower according to claim 1, characterized in that, A liquid outlet is provided at the bottom of the tower body, and the liquid outlet is connected to the regeneration tank assembly (9) through a pipeline. The red liquid outlets of the regeneration tank assembly (9) are respectively connected to the initial liquid distributor (2) and the liquid inlet sprayer (1).

3. The integrated elution desulfurization tower according to claim 2, characterized in that, The regeneration tank assembly (9) is located at the top of the tower body.

4. The integrated elution desulfurization tower according to claim 2, characterized in that The red liquid outlet of the regeneration tank assembly (9) is connected to the initial liquid distributor (2) through a main desulfurization liquid pipe (6), and the main desulfurization liquid pipe (6) is further connected to the liquid inlet sprayer (1) through a desulfurization liquid branch pipe (7).

5. The integrated elution desulfurization tower according to claim 4, wherein, The main desulfurization liquid pipe (6) is a U-shaped pipeline, and the desulfurization liquid branch pipe (7) is connected to the elbow of the U-shaped pipeline.

6. The integrated elution desulfurization tower according to any one of claims 1 to 5, characterized in that, A plurality of packing layers (4) are provided at intervals up and down in the tower body, and a liquid redistributor (5) for distributing the desulfurization liquid is provided. The plurality of packing layers (4) are located between the initial liquid distributor (2) and the liquid inlet sprayer (1).

7. The integrated elution desulfurization tower according to claim 6, characterized in that, The liquid redistributor (5) is located between two packing layers (4).

8. The integrated elution desulfurization tower according to claim 6, wherein, The packing layer (4) uses structured packing.

9. The integrated elution desulfurization tower according to claim 6, characterized in that, A gas-liquid distributor (3) is provided between the lowermost packing layer (4) and the liquid inlet sprayer (1). The gas-liquid distributor (3) is evenly provided with riser pipes (302), and a circle of diversion pipes (301) are provided at intervals along the circumferential direction of the tower body at its edge.

10. The integrated elution desulfurization tower according to claim 9, characterized in that, The gas-liquid distributor (3) includes a plurality of strip-shaped gas-liquid distribution units arranged in parallel and densely paved, and a plurality of support rods arranged in parallel and at intervals for supporting the gas-liquid distribution units. The two ends of the support rods are fixed on the inner wall of the tower body. The gas-liquid distribution units are evenly provided with riser pipes (302), and diversion pipes (301) are opened at both ends close to the inner wall of the tower body.

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