Skid-mounted natural gas desulfurization tower

Abstract

The utility model discloses a skid-mounted natural gas desulfurization tower which comprises a skid-mounted device, a tower body is fixed at the top of the skid-mounted device, and a primary treatment mechanism, a gas uniformizing and spraying mechanism, a tower plate assembly and a demister are sequentially arranged in the tower body along the natural gas flowing direction from a gas inlet to a gas outlet pipeline. The utility model relates to the technical field of natural gas preparation, a multi-desulfurization structure remarkably improves the desulfurization efficiency and the treatment capacity of natural gas, and can meet stricter environmental protection standards, so that multiple desulfurization methods can act synergistically and complement each other. Besides, the skid-mounted natural gas desulfurization tower has the characteristics of flexibility in operation and convenience in maintenance, and can be quickly adjusted according to actual requirements to adapt to different working conditions. The innovative design brings a new technical revolution to the field of natural gas desulfurization, and conforms to the concept of green and sustainable development.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas preparation, in particular to a skid-mounted natural gas desulfurization tower. Background Art

[0002] With the increasing requirements for environmental protection, natural gas is being used more and more widely as a clean energy source. During the extraction and processing of natural gas, the removal of sulfur-containing compounds such as hydrogen sulfide is an inevitable problem.

[0003] At present, the desulfurization tower is the key equipment to solve this problem. It removes sulfides from natural gas by physical adsorption or chemical absorption. These methods have their own advantages and disadvantages. Although physical adsorption is simple to operate, the adsorbent is easily saturated and needs to be replaced frequently; chemical absorption can handle large amounts of natural gas, but how to maximize the contact between the absorption liquid and the natural gas is a difficult problem; biological desulfurization is environmentally friendly, but the cycle is long and the efficiency is low. Therefore, the traditional single desulfurization method can no longer meet the increasingly stringent environmental protection requirements and the needs of efficient production, and technological innovation is urgently needed.

[0004] The existing chemical absorption desulfurization tower uses a single desulfurization method using a tray. This method often cannot fully adapt to sulfur-containing compounds of different concentrations and types, resulting in unstable desulfurization effects. In particular, when the gas flow rate or sulfide concentration fluctuates greatly, the desulfurization efficiency will be greatly reduced. In addition, a single desulfurization method often requires high operating costs and long processing time, which not only affects production efficiency, but also increases the economic burden of the enterprise. Therefore, the development of a natural gas desulfurization tower that can adapt to different working conditions, improve desulfurization efficiency, and is economical and environmentally friendly has become an urgent problem to be solved in the industry. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a skid-mounted natural gas desulfurization tower, which solves the problem that the existing desulfurization tower has a single desulfurization mode resulting in unstable effects.

[0006] To achieve the above object, the utility model is implemented by the following technical scheme: a skid-mounted natural gas desulfurization tower, including a skid, a tower body is fixed on the top of the skid, an air inlet and an air outlet pipeline are respectively arranged at the bottom and the top of the tower body, and a primary treatment mechanism, a gas uniformity spray mechanism, a tower plate assembly and a demister are sequentially arranged inside the tower body along the natural gas flow direction from the air inlet to the air outlet pipeline;

[0007] The primary treatment mechanism comprises an opening portion and a closing portion, wherein the closing portion receives the liquid dripping from the gas-uniform spraying mechanism and guides the liquid to the gas inlet to contact the natural gas;

[0008] The gas-uniform spray mechanism comprises a mesh tube and a spray head arranged around the mesh tube, and the liquid sprayed by the spray head acts on the mesh tube; wherein the natural gas flowing out of the opening part contacts the mesh tube and the liquid sprayed by the spray head when entering the mesh tube.

[0009] Preferably, the closed portion includes a groove plate, which is provided with a plurality of strip grooves, and the strip grooves include a first strip groove and a second strip groove which are staggered with each other, one end of the first strip groove and the second strip groove are connected to the groove plate, and a notch is formed between the other end and the groove plate, and the notch of the first strip groove and the notch of the second strip groove are staggered.

[0010] Preferably, baffles are provided at the bottom of each of the first strip-shaped grooves and the second strip-shaped grooves, and a flow channel for the flow of natural gas is formed between the baffles at the bottom of a plurality of the first strip-shaped grooves and the baffles at the bottom of a plurality of the second strip-shaped grooves.

[0011] Preferably, the sealing portion further comprises a plurality of protrusions formed on the groove plate, a liquid collecting cavity is formed between two adjacent protrusions, and the strip-shaped groove is formed at the bottom of the liquid collecting cavity.

[0012] Preferably, the opening portion guides the natural gas to the mesh cylinder; the opening portion includes an opening cavity, and a second air equalizing plate and a first air equalizing plate are arranged in the opening cavity from bottom to top.

[0013] Preferably, the uniform air spray mechanism further comprises a frame plate, and the frame plate is fixedly connected to the tower body; the mesh cylinder and the spray head are both arranged in the frame plate.

[0014] Preferably, a raised ring is provided on the top of the frame plate around the circumference of the net cylinder, and a liquid collecting groove is formed between the raised ring and the frame plate;

[0015] A liquid flow pipe is arranged in the liquid collecting tank, and the liquid flow pipe guides the liquid in the liquid collecting tank to the sealing part.

[0016] Preferably, the liquid flow tube is semi-arc-shaped in top view projection and is arranged above the closed portion.

[0017] Preferably, there are two liquid flow pipes, which are arranged between two adjacent spray heads.

[0018] Preferably, a liquid distribution pipe is connected between the bottom and the top of the tower body;

[0019] The top of the liquid distribution pipe is connected to the tower body and a spray pipe is provided, and the spray pipe is located between the demister and the tower plate assembly;

[0020] The liquid distribution pipe is connected to a liquid supply pipe, and the liquid supply pipe is connected to the spray head;

[0021] The liquid distribution pipe is connected with a liquid replenishing pipe, and the liquid replenishing pipe passes through the tower body and is arranged above the sealing part.

[0022] Beneficial effects of the utility model:

[0023] By using a skid-mounted natural gas desulfurization tower provided by the utility model, compared with the prior art, a curved flow channel is provided at the air inlet to form the first step of desulfurization; when the natural gas moves from bottom to top in the mesh tube, it contacts the liquid on the surface of the droplets and the stainless steel wire to complete the second step of desulfurization; the third step of desulfurization is carried out through the plate assembly of the desulfurization tower itself; the multiple desulfurization structures significantly improve the desulfurization efficiency and processing capacity of natural gas, and can meet more stringent environmental protection standards, so that multiple desulfurization methods can work together and complement each other. In addition, the skid-mounted natural gas desulfurization tower is flexible to operate and easy to maintain, and can be quickly adjusted according to actual needs to adapt to different working conditions. This innovative design has brought a new technological revolution to the field of natural gas desulfurization, which is in line with the concept of green and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the appearance diagram of the desulfurization tower of the utility model;

[0025] Figure 2 This is the front view of the desulfurization tower of the utility model;

[0026] Figure 3 This is a schematic diagram of the connection structure between the uniform gas spraying mechanism and the primary treatment mechanism and the tower body of the utility model;

[0027] Figure 4 This is a schematic diagram of the strip slot distribution of the utility model;

[0028] Figure 5 A schematic diagram of a flow channel formed between the strip-shaped slots of the utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the primary processing mechanism of the utility model;

[0030] Figure 7 It is a top view of the uniform air spray mechanism of the utility model.

[0031] Description of reference numerals in the figures

[0032] 1. tower body, 2. air outlet pipe, 3. skid-mounted, 4. air inlet, 5. liquid distribution pipe, 6. demister, 7. spray pipe, 8. liquid supply pipe, 9. liquid replenishing pipe, 10. tower plate assembly, 11. gas uniform spray mechanism, 111. frame plate, 112. mesh tube, 113. spray head, 114. liquid flow pipe, 115. raised ring, 116. liquid collecting tank, 12. primary treatment mechanism, 121. first gas uniform plate, 122. second gas uniform plate, 123. raised portion, 124. liquid collecting chamber, 125. strip groove, 1251. first strip groove, 1252. second strip groove, 126. notch, 127. circulation channel, 128. slot plate, 129. baffle. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. As long as the effect of the utility model can be exerted, various changes can be made to the implementation scheme.

[0034] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0035] Reference Figure 1-7 A skid-mounted natural gas desulfurization tower according to this embodiment is described.

[0036] The natural gas desulfurization tower includes a skid 3, a tower body 1 is fixed on the top of the skid 3, an air inlet 4 and an air outlet pipeline 2 are respectively provided at the bottom and top of the tower body 1, a liquid distribution pipe 5 is connected between the bottom and the top of the tower body 1, and a spray pipe 7 is provided at the top of the liquid distribution pipe 5 connected to the tower body 1, and the spray pipe 7 is located between the demister 6 and the tower plate assembly 10.

[0037] In this embodiment, a preliminary treatment mechanism 12, a uniform gas spray mechanism 11, a tray assembly 10 and a demister 6 are sequentially arranged inside the tower body 1 along the natural gas flow direction from the air inlet 4 to the air outlet pipe 2. The natural gas enters the tower body 1 from the air inlet 4 at the bottom and moves upward, passing through the preliminary treatment mechanism 12, the uniform gas spray mechanism 11, the tray assembly 10 and the demister 6 in sequence before flowing out through the air outlet pipe 2.

[0038] like Figure 2 and Figure 3As shown, the initial treatment mechanism 12 includes an opening and a closed portion. In the top view projection, the opening and the closed portion are combined to form a closed circle. The closed portion receives the liquid dripping from the gas-distributing spray mechanism 11 and guides the liquid to the gas inlet 4 to contact the natural gas. After contacting the dripping liquid, the natural gas flows into the opening, and the opening guides the natural gas to the net tube 112.

[0039] The liquid distribution pipe 5 is connected with a liquid replenishing pipe 9, which passes through the tower body 1 and is arranged above the closed part. When there is a lack of liquid at the top of the closed part, liquid can be replenished into the groove plate 128 through the liquid replenishing pipe 9.

[0040] The closed part includes a slot plate 128 and a flow channel formed at the bottom of the slot plate 128. The flow channel is arranged at the front side of the gas inlet 4, so that the natural gas flows in the continuous reciprocating flow channel after entering the tower body 1, and contacts with the liquid in the flow channel to form the first step of desulfurization.

[0041] In this embodiment, there are two ways to form the flow channel 127. Figure 4 , 5 , and the accompanying drawings shown in 6 provide detailed descriptions of the two formation methods:

[0042] The first formation method is: a plurality of strip grooves 125 are formed on the groove plate 128, and the strip grooves 125 include a first strip groove 1251 and a second strip groove 1252 which are arranged alternately, one end of the first strip groove 1251 and the second strip groove 1252 are connected to the groove plate 128, and a notch 126 is formed between the other end and the groove plate 128, and the notch 126 of the first strip groove 1251 and the notch 126 of the second strip groove 1252 are arranged alternately. Liquid is collected on the groove plate 128, and when the liquid flows out through the strip grooves 125, a plurality of water curtains are formed, and a flow channel 127 for the flow of natural gas is formed between all the water curtains. When the natural gas moves in the reciprocatingly bent flow channel 127, it contacts the water curtain-like liquid flowing down and changes direction continuously, forming the first step of the natural gas desulfurization process.

[0043] The second preferred forming method is: based on the first forming method, the second forming method is to set baffles 129 at the bottom of the first strip grooves 1251 and the second strip grooves 1252, and form a circulation channel 127 for the circulation of natural gas between the baffles 129 at the bottom of the first strip grooves 1251 and the baffles 129 at the bottom of the second strip grooves 1252. The baffles 129 are arranged so that the liquid flowing out of the first strip grooves 1251 and the second strip grooves 1252 is evenly distributed on the baffles 129, and the natural gas contacts the liquid on the baffles 129 when it reciprocates and changes direction in the circulation channel 127, completing the first step of the desulfurization process of the natural gas.

[0044] The second forming method of the circulation channel 127 has an advantage over the first forming method in that the structure of the circulation channel 127 is more stable, and the natural gas can stably flow in the circulation channel 127. In the first forming method, the contact effect between the natural gas and the liquid is better when the natural gas flows in the circulation channel 127, but the natural gas will pass through the water curtain due to the unstable factors of the formation of the water curtain.

[0045] The sealing part further includes a plurality of protrusions 123 formed on the groove plate 128, a liquid collecting cavity 124 is formed between two adjacent protrusions 123, and a strip groove 125 is formed at the bottom of the liquid collecting cavity 124. The liquid is concentrated in each liquid collecting cavity 124, ensuring that a sufficient amount of liquid is formed at each strip groove 125.

[0046] like Figure 3 and 6 The opening portion includes an open cavity, in which a second gas equalizing plate 122 and a first gas equalizing plate 121 are arranged from bottom to top. When the natural gas passes through the open cavity and enters the mesh tube 112, the gas is equalized by the second gas equalizing plate 122 and the first gas equalizing plate 121. The second gas equalizing plate 122 and the first gas equalizing plate 121 are both stainless steel mesh plates.

[0047] like Figure 3 and 7 As shown, the uniform gas spraying mechanism 11 comprises a mesh tube 112 and a spray head 113 arranged around the mesh tube 112, and the liquid sprayed by the spray head 113 acts on the mesh tube 112. The mesh tube 112 is made of stainless steel and is formed by interweaving multiple stainless steel wires. There is a gap inside the mesh tube to ensure that liquid and natural gas can enter and flow out.

[0048] The liquid distribution pipe 5 is connected to a liquid supply pipe 8, which is connected to the spray head 113. The natural gas flowing out of the opening comes into contact with the liquid sprayed from the mesh tube 112 and the spray head 113 when entering the mesh tube 112. In actual operation, the liquid sprayed from the spray head 113 works on the stainless steel wire of the mesh tube 112 to form irregular drops. When the natural gas moves from bottom to top in the mesh tube 112, it comes into contact with the drops and the liquid on the surface of the stainless steel wire, completing the second step of the desulfurization process.

[0049] The natural gas continues to move upward and enters the tower plate assembly 10 in the tower body 1 to complete the third step of the desulfurization process. The desulfurized natural gas contacts the demister 6 and leaves the tower body 1 through the gas outlet pipe 2 after being dehumidified.

[0050] It should be further explained that the uniform air spray mechanism 11 further includes a frame plate 111 , which is fixedly connected to the tower body 1 ; the net tube 112 and the spray head 113 are both arranged in the frame plate 111 .

[0051] A raised ring 115 is provided on the top of the frame plate 111 around the circumference of the net cylinder 112, and a liquid collecting groove 116 is formed between the raised ring 115 and the frame plate 111. A liquid flow pipe 114 is provided in the liquid collecting groove 116, and the liquid flow pipe 114 guides the liquid in the liquid collecting groove 116 to the closed part.

[0052] The liquid flow pipe 114 is semi-arc-shaped in top view projection and is disposed above the closed portion. There are two liquid flow pipes 114 disposed between two adjacent spray heads 113. The liquid flow pipe 114 is designed in this way, which can ensure the maximum outflow of liquid while not affecting the operation of the spray head 113.

[0053] The liquid flowing out of the tray assembly 10 falls into the liquid collecting groove 116 on the frame plate 111, and does not enter the mesh cylinder 112 or only a small amount of liquid enters the mesh cylinder 112, which does not affect the contact effect between the spray head 113 and the mesh cylinder 112 after spraying. The liquid in the liquid collecting groove 116 flows into the slot plate 128 through the liquid flow pipe 114 to replenish the liquid stock in the liquid collecting cavity 124.

[0054] Working principle: There is a composite liquid for natural gas desulfurization at the bottom of the tower body 1. The liquid is transported to the spray pipe 7 through the liquid distribution pipe 5 and sprayed downward on the tower plate assembly 10. The liquid flowing out of the tower plate assembly 10 falls into the liquid collecting tank 116 on the frame plate 111, and the liquid flow pipe 114 guides the liquid in the liquid collecting tank 116 to the closed part. The liquid is concentrated in each liquid collecting cavity 124, and the liquid flows out through the staggered strip slots 125 to act on the baffle 129.

[0055] After entering the tower body 1 from the air inlet 4, the natural gas moves upward; when the natural gas reciprocates and changes direction in the circulation channel 127, it contacts the liquid on the baffle 129, completing the first step of the natural gas desulfurization process. After passing through the circulation channel 127, the natural gas enters the opening, and after the gas is homogenized by the second gas equalizing plate 122 and the first gas equalizing plate 121, it enters the mesh tube 112 and continues to move upward. The liquid sprayed by the spray head 113 operates on the stainless steel wire of the mesh tube 112, forming irregular droplets. When the natural gas moves from bottom to top in the mesh tube 112, it contacts the droplets and the liquid on the surface of the stainless steel wire, completing the second step of the desulfurization process. When the natural gas continues to move upward and passes through the tower plate assembly 10, the third step of the desulfurization process is carried out. After being dehumidified by the demister 6, the natural gas flows out through the outlet pipe 2.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A skid-mounted natural gas desulfurization tower, comprising a skid (3), a tower body (1) being fixed on the top of the skid (3), an air inlet (4) and an air outlet pipeline (2) being respectively arranged at the bottom and the top of the tower body (1), characterized in that: A preliminary treatment mechanism (12), a gas-homogenizing spray mechanism (11), a tray assembly (10) and a demister (6) are sequentially arranged inside the tower body (1) along the natural gas flow direction from the gas inlet (4) to the gas outlet pipeline (2); The primary treatment mechanism (12) comprises an opening portion and a closing portion, wherein the closing portion receives the liquid dripping from the gas-uniform spraying mechanism (11) and guides the liquid to the gas inlet (4) to contact with the natural gas; The gas-uniform spraying mechanism (11) comprises a mesh cylinder (112) and a spray head (113) arranged in the circumference of the mesh cylinder (112); the liquid sprayed by the spray head (113) acts on the mesh cylinder (112); wherein the natural gas flowing out of the opening portion contacts the mesh cylinder (112) and the liquid sprayed by the spray head (113) when entering the mesh cylinder (112).

2. A skid-mounted natural gas desulfurization tower according to claim 1, characterized in that: The closed portion comprises a groove plate (128), and a plurality of strip grooves (125) are formed on the groove plate (128). The strip grooves (125) comprise a first strip groove (1251) and a second strip groove (1252) which are arranged alternately with each other. One end of the first strip groove (1251) and the second strip groove (1252) are connected to the groove plate (128), and a notch (126) is formed between the other end and the groove plate (128), and the notch (126) of the first strip groove (1251) and the notch (126) of the second strip groove (1252) are arranged alternately.

3. A skid-mounted natural gas desulfurization tower according to claim 2, characterized in that: Baffles (129) are provided at the bottom of each of the first strip-shaped grooves (1251) and the second strip-shaped grooves (1252), and a circulation channel (127) for the circulation of natural gas is formed between the baffles (129) at the bottom of a plurality of the first strip-shaped grooves (1251) and the baffles (129) at the bottom of a plurality of the second strip-shaped grooves (1252).

4. A skid-mounted natural gas desulfurization tower according to claim 2, characterized in that: The sealing portion further comprises a plurality of protrusions (123) formed on the groove plate (128), a liquid collecting cavity (124) is formed between two adjacent protrusions (123), and the strip-shaped slot (125) is formed at the bottom of the liquid collecting cavity (124).

5. The skid-mounted natural gas desulfurization tower according to claim 1, characterized in that: The opening portion guides the natural gas to the mesh cylinder (112); the opening portion comprises an opening cavity, in which a second gas equalizing plate (122) and a first gas equalizing plate (121) are arranged from bottom to top.

6. The skid-mounted natural gas desulfurization tower according to claim 1, characterized in that: The uniform air spraying mechanism (11) further comprises a frame plate (111), wherein the frame plate (111) is fixedly connected to the tower body (1); the net cylinder (112) and the spray head (113) are both arranged in the frame plate (111).

7. The skid-mounted natural gas desulfurization tower according to claim 6, characterized in that: A raised ring (115) is arranged at the top of the frame plate (111) around the circumference of the net cylinder (112), and a liquid collecting groove (116) is formed between the raised ring (115) and the frame plate (111); A liquid flow pipe (114) is arranged in the liquid collecting tank (116), and the liquid flow pipe (114) guides the liquid in the liquid collecting tank (116) to the closed portion.

8. The skid-mounted natural gas desulfurization tower according to claim 7, characterized in that: The liquid flow pipe (114) is semi-arc-shaped in top view projection and is arranged above the closed portion.

9. The skid-mounted natural gas desulfurization tower according to claim 8, characterized in that: There are two liquid flow pipes (114), which are arranged between two adjacent spray heads (113).

10. The skid-mounted natural gas desulfurization tower according to claim 1, characterized in that: A liquid distribution pipe (5) is connected between the bottom and the top of the tower body (1); A spray pipe (7) is provided at the top of the liquid distribution pipe (5) connected to the tower body (1), and the spray pipe (7) is located between the demister (6) and the tower plate assembly (10); The liquid distribution pipe (5) is connected to a liquid supply pipe (8), and the liquid supply pipe (8) is connected to a spray head (113); The liquid distribution pipe (5) is connected to a liquid replenishing pipe (9), and the liquid replenishing pipe (9) passes through the tower body (1) and is arranged above the closed part.

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