Shale gas desulfurization device

Abstract

The utility model relates to the technical field of desulfurization, in particular to a shale gas desulfurization device which comprises a desulfurization tower, a pretreatment device used for carrying out pre-desulfurization treatment on shale gas entering the desulfurization tower is arranged on one side of the desulfurization tower, and the pretreatment device comprises a gas inlet hopper of which the diameter is gradually reduced from top to bottom; an air inlet pipe is arranged on the upper portion of the air inlet hopper, the output end of the air inlet pipe is communicated with the air inlet hopper in the tangential direction of the air inlet hopper, a center hopper with the diameter gradually decreasing from top to bottom is arranged in the air inlet hopper, and a certain gap is reserved between the center hopper and the air inlet hopper. According to the shale gas desulfurization device, shale gas entering the desulfurization tower is pretreated, so that the shale gas reacts with part of sulfides in the gas in advance, the content of the sulfides entering the desulfurization tower is reduced, the treatment load of the desulfurization tower is reduced, and the desulfurization effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to desulfurization technical field especially is involved in a shale gas desulfurization device. BACKGROUND

[0002] In the exploitation and processing process of shale gas, some sulfur compounds such as hydrogen sulfide and other organic sulfides will be produced, these sulfides are not only harmful to the environment, but also have corrosion effect on subsequent processing equipment and pipeline, therefore, it must be removed before the gas enters the conveying pipe network or further processing, the common desulfurization device has desulfurization tower, and the chemical slurry in the desulfurization tower is used to absorb sulfides, but if the desulfurization treatment completely relies on the slurry in the tower, the sulfur content in the shale gas without desulfurization is high, which increases the processing load of the desulfurization tower, resulting in the reduction of desulfurization efficiency, and if this situation is to be avoided, it may be necessary to use higher concentration of spray slurry, larger slurry circulation amount and higher spray pressure, which will increase the system energy consumption, resulting in the rapid wear and corrosion of the equipment in the tower, such as nozzle, tower body, high failure rate and reduced service life.

[0003] Based on the above situation, the shale gas desulfurization device is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a shale gas desulfurization device to solve the problem that the sulfur content in the shale gas without desulfurization is high and directly enters the desulfurization tower, which increases the processing load of the desulfurization tower and results in the reduction of desulfurization efficiency.

[0005] The technical problem solved by the utility model is realized by the following technical scheme:

[0006] A shale gas desulfurization device, including desulfurization tower, the one side of desulfurization tower is equipped with the pretreatment device for carrying out the pre-desulfurization treatment to the shale gas that enters the desulfurization tower, the pretreatment device includes the gas intake hopper that gradually reduces from top to bottom in diameter, the upper portion of gas intake hopper is equipped with the gas intake pipe, the output end of gas intake pipe is communicated with gas intake hopper along the tangent direction of gas intake hopper, the inside of gas intake hopper is equipped with the center hopper that gradually reduces from top to bottom in diameter, and the certain gap is left between center hopper and gas intake hopper, center hopper is equipped with the gas conveying pipe that is communicated with the inside of desulfurization tower, the inside of center hopper is equipped with the connecting pipe, the connecting pipe is equipped with the spray head for spraying slurry, the input end of connecting pipe is equipped with the liquid conveying pipe that extends to the inside of desulfurization tower, the liquid conveying pipe is equipped with the first water pump for conveying the slurry in the desulfurization tower to the connecting pipe.

[0007] Preferably, the inside of the center hopper is provided with a spiral channel, and the spray head is located in the inside of the spiral channel.

[0008] Preferably, a reflux pipe is arranged between the gas inlet funnel and the desulfurization tower, an inlet liquid funnel is arranged at the input end of the reflux pipe and coincides with the center funnel axis, and the inlet liquid funnel is arranged above the minimum inner diameter end of the gas inlet funnel.

[0009] Preferably, a filter cylinder is connected to the flange of the reflux pipe, and a filter layer is arranged in the filter cylinder.

[0010] Preferably, a collection box is detachably connected to the bottom of the gas inlet funnel.

[0011] Preferably, an acid-base degree detector is arranged at the bottom of the desulfurization tower to detect the acid-base degree of the slurry.

[0012] The shale gas enters the gas inlet funnel in the tangential direction through the gas inlet head, forms a cyclone gas flow, and preliminarily filters the solid particles in the shale gas, and then the filtered gas flows into the desulfurization tower through the center funnel, and the shale gas is sprayed with slurry through the spray head in the center funnel for pretreatment, so that the shale gas reacts with part of sulfides in the gas in advance, the content of sulfides entering the desulfurization tower is reduced, the processing load of the desulfurization tower is reduced, and the desulfurization effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 The present application provides an isometric structural schematic diagram:

[0015] Figure 2 The present application provides a cross-sectional structural schematic diagram:

[0016] Figure 3 The present application provides a pretreatment device cross-sectional structural schematic diagram:

[0017] Figure 4 The present application provides a desulfurization tower cross-sectional structural schematic diagram.

[0018] In the figure, 1, desulfurization tower; 11, mist eliminator layer; 12, spray layer; 13, slurry layer; 14, spray pipeline; 15, second water pump; 2, pretreatment device; 21, air inlet hopper; 22, air inlet pipe; 3, center hopper; 31, gas conveying pipe; 32, connecting pipe; 33, spray head; 34, liquid conveying pipe; 35, first water pump; 4, spiral channel; 5, return pipe; 51, liquid inlet hopper; 6, filter cartridge; 61, filter layer; 7, collection box; 8, pH detector. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific drawings.

[0020] REFERENCE Figures 1-4The shale gas desulfurization device shown includes a desulfurization tower 1, the inside of the desulfurization tower 1 is sequentially provided from top to bottom with a demisting layer 11, a spraying layer 12 and a slurry layer 13, a spraying pipeline 14 is arranged between the slurry layer 13 and the spraying layer 12, a second water pump 15 is arranged on the spraying pipeline 14, the slurry is extracted to the spraying layer 12 by the second water pump 15 to spray out to absorb the oxides of sulfur and other acidic substances, the flue gas after desulfurization passes through the demisting layer 11 to remove the mist droplets, and then subsequent processing work is carried out, this technology is the prior art of the desulfurization tower 1, and those skilled in the art should know that it will not be described in detail here, but when the existing desulfurization tower 1 carries out desulfurization treatment on the shale gas, the shale gas is directly input into the desulfurization tower 1, the sulfur content in the shale gas without desulfurization is relatively high, which increases the processing load of the desulfurization tower 1, resulting in reduced desulfurization efficiency, in order to solve this problem, a pretreatment device 2 for carrying out pre-desulfurization treatment on the shale gas entering the desulfurization tower 1 is arranged on one side of the desulfurization tower 1, the pretreatment device 2 includes an air inlet funnel 21 with a diameter gradually decreasing from top to bottom, an air inlet pipe 22 is arranged on the upper part of the air inlet funnel 21, the output end of the air inlet pipe 22 is connected with the air inlet funnel 21 in the tangential direction of the air inlet funnel 21, a central funnel 3 with a diameter gradually decreasing from top to bottom is arranged in the inside of the air inlet funnel 21, and a certain gap is left between the central funnel 3 and the air inlet funnel 21, the shale gas is input from the air inlet pipe 22 into the air inlet funnel 21, the gas enters in the tangential direction of the air inlet head, the airflow changes from linear motion to circular motion, most of the rotating gas rotates downward along the inner wall of the air inlet funnel 21 and generates centrifugal force to throw the particulate impurities in the gas to the inner wall of the air inlet funnel 21, the particulate impurities move downward under the gravity and fall into the collection box 7 connected to the bottom of the air inlet funnel 21 to collect the particulate impurities, the collection box 7 is detachably connected with the air inlet funnel 21, so that the dust and the like collected in the collection box 7 can be conveniently cleaned, and the downward rotating airflow reaches the part with a smaller diameter at the bottom end of the air inlet funnel when the airflow reaches the part with a smaller diameter at the bottom end of the air inlet funnel, the gas is close to the center due to the diameter reduction and contraction, and the airflow rotates upward from the bottom to enter the central funnel 3, a gas conveying pipe 31 connected with the inside of the desulfurization tower 1 is arranged on the central funnel 3, the output end of the gas conveying pipe 31 is located between the spraying layer 12 and the slurry layer 13, the gas after impurity removal enters the desulfurization tower 1 to contact with the slurry sprayed downward, so as to increase the turbulence and mixing degree between the gas and the slurry, a connecting pipe 32 is arranged in the inside of the central funnel 3, a spraying head 33 for spraying the slurry is arranged on the connecting pipe 32, a liquid conveying pipe 34 extending into the inside of the desulfurization tower 1 is arranged on the input end of the connecting pipe 32, a first water pump 35 is arranged on the liquid conveying pipe 34 to convey the slurry in the desulfurization tower 1 to the connecting pipe 32, the slurry is sprayed out from the spraying head 33 to spray the shale gas after filtration with the slurry to carry out pretreatment, realize the reaction with part of the sulfides in the gas in advance, reduce the content of the sulfides entering the desulfurization tower 1, thereby reducing the processing load of the desulfurization tower 1 and improving the desulfurization effect, since the content of the sulfides entering the desulfurization tower 1 is reduced, the remaining slurry in the desulfurization tower 1 can more fully react with the sulfides,The desulfurization capacity of unit volume slurry is improved.

[0021] Further, referring to Figure 2 As shown in the figure, the inside of the central hopper 3 is provided with a spiral channel 4, and the spray head 33 is located inside the spiral channel 4. The spiral channel 4 is used to increase the residence time of the filtered gas in the central hopper 3, so that the slurry sprayed by the spray head 33 can be more fully contacted, thereby improving the desulfurization effect.

[0022] Further, referring to Figure 2 As shown in the figure, the backflow pipe 5 is provided between the gas inlet hopper 21 and the desulfurization tower 1. The input end of the backflow pipe 5 is provided with a liquid inlet hopper 51 coaxial with the central hopper 3. The slurry sprayed by the spray head 33 flows out through the spiral channel 4, enters the backflow pipe 5 through the liquid inlet hopper 51, and then flows back to the desulfurization tower 1, thereby realizing recycling. At the same time, the liquid inlet hopper 51 is located above the minimum end of the inner diameter of the gas inlet hopper 21, thereby reducing the solid particles falling on the inner wall of the gas inlet hopper 21.

[0023] The filter cylinder 6 is flange-connected to the backflow pipe 5. The inside of the filter cylinder 6 is provided with a filter layer 61. The filter layer 61 can be an activated carbon layer or the like. The filter layer 61 can be used to adsorb and filter part of the solid particle impurities entering the backflow pipe 5. When the adsorption state of the filter layer 61 reaches saturation, the filter cylinder 6 can be removed to replace the filter layer 61.

[0024] Further, the bottom of the desulfurization tower 1 is provided with an acid-base degree detector 8, such as a pH meter, for detecting the acid-base degree of the slurry. The acid-base degree of the slurry can be monitored in real time, so that new slurry can be added in time to avoid affecting the desulfurization effect.

[0025] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application. These changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A shale gas desulfurization device, comprising a desulfurization tower (1), characterized in that, A pretreatment device (2) for pre-desulfurizing shale gas entering the desulfurization tower (1) is provided on one side. The pretreatment device (2) includes an air inlet hopper (21) with a diameter that gradually decreases from top to bottom. An air inlet pipe (22) is provided at the upper part of the air inlet hopper (21). The output end of the air inlet pipe (22) is connected to the air inlet hopper (21) along the tangential direction of the air inlet hopper (21). Inside the air inlet hopper (21) is a central hopper (3) with a diameter that gradually decreases from top to bottom. The central hopper (3) is connected to the air inlet hopper (21) along the tangential direction of the air inlet hopper (21). There is a certain gap between the air inlet hoppers (21). The central hopper (3) is provided with an air supply pipe (31) that is connected to the inside of the desulfurization tower (1). The interior of the central hopper (3) is provided with a connecting pipe (32). The connecting pipe (32) is provided with a spray head (33) for spraying slurry. The input end of the connecting pipe (32) is provided with a liquid supply pipe (34) that extends into the inside of the desulfurization tower (1). The liquid supply pipe (34) is provided with a first water pump (35) for transporting the slurry in the desulfurization tower (1) to the connecting pipe (32).

2. The shale gas desulfurization device according to claim 1, characterized in that, The center bucket (3) has a spiral channel (4) inside, and the spray head (33) is located inside the spiral channel (4).

3. A shale gas desulfurization device according to claim 1, characterized in that, A reflux pipe (5) is provided between the air inlet hopper (21) and the desulfurization tower (1). The input end of the reflux pipe (5) is provided with a liquid inlet hopper (51) that coincides with the axis of the central hopper (3). The liquid inlet hopper (51) is located above the smallest end of the inner diameter of the air inlet hopper (21).

4. A shale gas desulfurization device according to claim 3, characterized in that, The return pipe (5) is flanged and connected to a filter cylinder (6), and the filter cylinder (6) has a filter layer (61) inside.

5. A shale gas desulfurization device according to claim 1, characterized in that, The bottom of the air intake hopper (21) is detachably connected to a collection box (7).

6. A shale gas desulfurization device according to claim 1, characterized in that, The bottom of the desulfurization tower (1) is equipped with an acid-base detector (8) for detecting the acid-base of the slurry.

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