An erosion-proof structure for a sulfuric acid tank and its working method

Abstract

An erosion-proof structure for a sulfuric acid tank and its working method of the present invention disclose a structure that first unloads and buffers the kinetic energy of sulfuric acid through a double-vortex structure, and then disperses the kinetic energy of sulfuric acid through a double-shunt structure and makes them converge and offset each other, so as to prevent the flow-blocking structure from bearing excessive impact load and causing erosion to the sulfuric acid tank. It is characterized in that the liquid inlet pipe is placed at the top of the main cylinder and is communicated with the inside of the main cylinder. The two end faces of the main cylinder protrude towards the outside of the main cylinder to form arc surfaces. Two liquid outlet grooves are opened at the bottom of the main cylinder. The liquid outlet grooves extend from one side of the main cylinder to the other side. The main liquid outlet pipe is correspondingly communicated with the liquid outlet grooves. The middle shunt plate is placed at the bottom of the main cylinder and is located between the two liquid outlet grooves. The top of the middle shunt plate protrudes towards the inside of the main cylinder to form a tip, and a protective sleeve made of acid-resistant material is placed on the tip.

Description

Technical Field

[0001] An erosion - proof structure for a sulfuric acid tank and its working method of the present invention relate to a structure for avoiding the erosion of a sulfuric acid tank by sulfuric acid, belonging to the field of chemical engineering. In particular, it relates to a structure that first unloads and buffers the kinetic energy of sulfuric acid through a double - vortex structure, and then disperses the kinetic energy of sulfuric acid through a double - diversion structure and makes them converge and offset each other, so as to avoid the erosion of the sulfuric acid tank caused by the excessive impact load on the flow - blocking structure. Background Technique

[0002] The sulfuric acid tank is one of the commonly used facilities in sulfuric acid production. Currently, during the sulfuric acid production process, the hot concentrated sulfuric acid coming down from the drying tower and the absorption tower directly flows into the sulfuric acid tank. Due to its large falling height, the falling hot concentrated sulfuric acid has strong kinetic energy, and coupled with the strong corrosiveness of sulfuric acid itself, the falling sulfuric acid forms a strong impact and erosion on the sulfuric acid tank, which easily causes the acid - resistant bricks on the bottom lining of the sulfuric acid tank to be eroded and loosened, and then corrodes the bottom steel plate of the tank, resulting in serious consequences. In the prior art, flow - blocking is achieved by adding protection piers and perforated baffles on the falling path of sulfuric acid. However, since the falling scouring kinetic energy of sulfuric acid directly impacts the baffles and piers, during long - term use, the piers and baffles are easily eroded and damaged, affecting their flow - blocking effect.

[0003] Patent Publication No. CN206985710U discloses an erosion - proof sulfuric acid tank, including an acid tank body and a sulfuric acid inlet pipe. A protection pier is provided directly below the sulfuric acid inlet pipe inside the acid tank body. A cavity is provided inside the protection pier, and a detachable inverted funnel and a perforated plate are installed from top to bottom inside the cavity. Outlet openings are provided on both side walls of the protection pier corresponding to the positions of the inverted funnel and the perforated plate; an overflow pipe is provided on one side of the acid tank body, and the overflow pipe is connected to a sump. A liquid outlet pipe with a valve is provided at the bottom end of one side of the sump; a concentrated sulfuric acid detection mechanism is provided on the overflow pipe, and the concentrated sulfuric acid detection mechanism is connected to an alarm. This erosion - proof structure uses the protection pier and the baffle for flow - blocking. However, since the falling scouring force directly acts on the pier and the baffle during flow - blocking, its service life is short, and damage problems are likely to occur. Summary of the Invention

[0004] In order to improve the above - mentioned situation, an erosion - proof structure for a sulfuric acid tank and its working method of the present invention provides a structure that first unloads and buffers the kinetic energy of sulfuric acid through a double - vortex structure, and then disperses the kinetic energy of sulfuric acid through a double - diversion structure and makes them converge and offset each other, so as to avoid the erosion of the sulfuric acid tank caused by the excessive impact load on the flow - blocking structure.

[0005] The anti-erosion structure for a sulfuric acid tank of the present invention is realized as follows: The anti-erosion structure for a sulfuric acid tank of the present invention is composed of a liquid inlet pipe, side flow splitters, vortex buffer plates, a middle flow splitter, a main liquid outlet pipe, a central convergence chamber, a main body cylinder, liquid outlet holes, and auxiliary liquid outlet pipes. The liquid inlet pipe is placed at the top of the main body cylinder and is connected to the inside of the main body cylinder. The two end faces of the main body cylinder bulge outwards towards the outside of the main body cylinder to form arc surfaces. Two liquid outlet grooves are opened at the bottom of the main body cylinder, and the liquid outlet grooves extend from one side of the main body cylinder to the other side. The main liquid outlet pipe is correspondingly connected to the liquid outlet grooves. The middle flow splitter is placed at the bottom of the main body cylinder and is located between the two liquid outlet grooves. The top of the middle flow splitter bulges inwards towards the inside of the main body cylinder to form a tip, and a protective sleeve made of acid-resistant material is placed on the tip. The convex surface of the middle flow splitter is an arc surface. Two side flow splitters are placed inside the main body cylinder, and the two sides of the side flow splitters are correspondingly placed on the two sides of the main body cylinder. One end of the side flow splitter corresponds to the liquid inlet pipe. The vortex buffer plates are placed at the other ends of the side flow splitters, and the two vortex buffer plates have opposite rotation directions. The vortex buffer plates, side flow splitters, and middle flow splitter cooperate to form a central convergence chamber. Liquid outlet holes are opened on the side wall of the main body cylinder corresponding to the centers of the vortex buffer plates, and the auxiliary liquid outlet pipes are connected to the liquid outlet holes.

[0006] The usage method steps of the anti-erosion structure for a sulfuric acid tank of the present invention are as follows:

[0007] 1) Connect the liquid inlet pipe, main liquid outlet pipe, and auxiliary liquid separation pipe to the sulfuric acid production equipment respectively;

[0008] 2) The sulfuric acid solution enters the main body cylinder from the liquid inlet pipe;

[0009] 3) The two side flow splitters cooperate to divide the sulfuric acid solution into three parts, which are the sulfuric acid flowing towards the inner walls at both ends and the sulfuric acid falling between the two side flow splitters;

[0010] 4) The sulfuric acid flowing along the inner wall of the main body cylinder towards both ends is guided by the outer wall of the vortex buffer plate and the inner wall of the main body cylinder and flows to the liquid outlet grooves;

[0011] 5) The sulfuric acid falling between the two side flow splitters is divided into two parts again when passing through the vortex buffer plates, which are the sulfuric acid solution entering the vortex buffer plates and the sulfuric acid solution passing through the central convergence chamber;

[0012] 6) The sulfuric acid solution entering the vortex buffer plates undergoes layer-by-layer vortex buffering in the vortex buffer plates and then flows out from the auxiliary liquid outlet pipes;

[0013] 7) The sulfuric acid solution passing through the central convergence chamber continues to fall, and after being split by the middle flow splitter, it is divided into two streams and flows into the liquid outlet grooves;

[0014] 8) The sulfuric acid solution flowing down along the inner wall of the main cylinder at the liquid outlet tank and the sulfuric acid solution shunted by the middle shunt plate flow in opposite directions, then collide with each other to cancel out the kinetic energy, and finally flow out from the main liquid outlet pipe through the liquid outlet tank.

[0015] Beneficial effects:

[0016] First, it can buffer the kinetic energy of sulfuric acid through the double-vortex structure, and at the same time disperse and cancel out the kinetic energy of sulfuric acid through the double-shunt structure, avoiding the blocking structure from bearing excessive impact loads.

[0017] Second, it can disperse and cancel out the kinetic energy of sulfuric acid, avoiding the sulfuric acid from scouring the sulfuric acid tank wall, and thus avoiding corrosion of the sulfuric acid tank wall.

[0018] Third, the structure is simple, convenient and practical.

[0019] Fourth, the cost is low and it is convenient to promote. Description of the drawings

[0020] Figure 1 Structure schematic diagram of an erosion-proof structure for a sulfuric acid tank of the present invention.

[0021] Figure 2 Left view of an erosion-proof structure for a sulfuric acid tank of the present invention.

[0022] Figure 3 Bottom view of an erosion-proof structure for a sulfuric acid tank of the present invention.

[0023] Reference numerals:

[0024] Liquid inlet pipe (1), side shunt plate (2), vortex buffer plate (3), middle shunt plate (4), main liquid outlet pipe (5), central convergence cavity (6), main cylinder (7), liquid outlet hole (8), auxiliary liquid outlet pipe (9). Detailed implementation manners

[0025] The anti-erosion structure for a sulfuric acid tank of the present invention is realized as follows: The anti-erosion structure for a sulfuric acid tank of the present invention is composed of a liquid inlet pipe (1), side flow dividing plates (2), vortex buffer plates (3), a middle flow dividing plate (4), a main liquid outlet pipe (5), a central convergence cavity (6), a main body cylinder (7), liquid outlet holes (8) and auxiliary liquid outlet pipes (9). The liquid inlet pipe (1) is placed at the top of the main body cylinder (7) and is connected to the inside of the main body cylinder (7). The two end faces of the main body cylinder (7) bulge outwards towards the outside of the main body cylinder (7) to form arc surfaces. Two liquid outlet grooves are opened at the bottom of the main body cylinder (7). The liquid outlet grooves extend from one side of the main body cylinder (7) to the other side. The main liquid outlet pipe (5) is correspondingly connected to the liquid outlet grooves. The middle flow dividing plate (4) is placed at the bottom of the main body cylinder (7) and is located between the two liquid outlet grooves. The top of the middle flow dividing plate (4) bulges into the inside of the main body cylinder (7) to form a tip. A protective sleeve made of acid-resistant material is placed on the tip. The bulging surface of the middle flow dividing plate (4) is an arc surface. Two side flow dividing plates (2) are placed inside the main body cylinder (7). The two sides of the side flow dividing plates (2) are correspondingly placed on the two sides of the main body cylinder (7). One end of the side flow dividing plates (2) corresponds to the liquid inlet pipe (1). The vortex buffer plates (3) are placed on the other ends of the side flow dividing plates (2). The two vortex buffer plates (3) have opposite swirl directions. The vortex buffer plates (3), side flow dividing plates (2) and middle flow dividing plate (4) cooperate to form a central convergence cavity (6). Liquid outlet holes (8) are opened on the side wall of the main body cylinder (7) corresponding to the centers of the vortex buffer plates (3). The auxiliary liquid outlet pipes (9) are connected to the liquid outlet holes (8).

[0026] The usage method steps of the anti-erosion structure for a sulfuric acid tank of the present invention are as follows:

[0027] 1) Connect the liquid inlet pipe (1), main liquid outlet pipe (5) and auxiliary liquid dividing pipes to sulfuric acid production equipment respectively;

[0028] 2) The sulfuric acid solution enters the main body cylinder (7) from the liquid inlet pipe (1);

[0029] 3) The two side flow dividing plates (2) cooperate to divide the sulfuric acid solution into three parts, namely the sulfuric acid flowing towards the inner walls at both ends and the sulfuric acid falling between the two side flow dividing plates (2);

[0030] 4) The sulfuric acid flowing along the inner wall of the main body cylinder (7) towards both ends is guided by the outer walls of the vortex buffer plates (3) and the inner wall of the main body cylinder (7) and flows to the liquid outlet grooves;

[0031] 5) The sulfuric acid falling between the two side flow dividing plates (2) is divided into two parts again when passing through the vortex buffer plates (3), namely the sulfuric acid solution entering the vortex buffer plates (3) and the sulfuric acid solution passing through the central convergence cavity (6);

[0032] 6) The sulfuric acid solution that enters the vortex buffer plate (3) undergoes layer-by-layer vortex buffering in the vortex buffer plate (3) and then flows out from the auxiliary outlet pipe (9);

[0033] 7) The sulfuric acid solution passing through the central convergence chamber (6) continues to fall, and after being split by the middle flow splitting plate (4), it is divided into two streams and flows into the liquid outlet tank;

[0034] 8) The sulfuric acid solution flowing down along the inner wall of the main body cylinder (7) at the liquid outlet tank and the sulfuric acid solution split by the middle flow splitting plate (4) flow in opposite directions, then collide and impact each other to cancel out the kinetic energy, and finally flow out from the main outlet pipe (5) through the liquid outlet tank.

[0035] Both end faces of the main body cylinder (7) protrude towards the outside of the main body cylinder (7) to form an arc-shaped design. On the one hand, it can guide the sulfuric acid solution towards the inner walls at both ends of the main body cylinder (7), so that the sulfuric acid solution flows to the liquid outlet tank through the guidance of the end faces at both ends of the main body cylinder (7). On the other hand, compared with a flat surface, when the sulfuric acid solution impacts the end faces at both ends, the arc surface can relieve the impact force of the sulfuric acid solution, disperse the impact force, and make it receive less impact kinetic energy.

[0036] The design that the liquid outlet tank extends from one side of the main body cylinder (7) to the other side can expand the contact area between the liquid outlet tank and the sulfuric acid solution, so that more sulfuric acid solutions that collide and impact each other to cancel out can flow out, increasing the flow rate of the sulfuric acid solution.

[0037] The top of the middle flow splitting plate (4) protrudes towards the inside of the main body cylinder (7) to form a tip design. When in use, the tip can change the contact surface between the protruding part and the sulfuric acid solution from surface contact to line contact, thereby reducing the contact area between the protruding part and the sulfuric acid solution. On the one hand, it can make the middle flow splitting plate (4) easier to split the sulfuric acid solution. On the other hand, it can reduce the corrosion of the tip end by the sulfuric acid solution, thereby extending the service life of the middle flow splitting plate (4).

[0038] The design that a protective sleeve made of acid-resistant material is placed on the tip can further protect the tip, avoid corrosion of the tip under the impact of sulfuric acid solution for a long time, thereby extending the service life of the middle flow splitting plate (4).

[0039] The protruding surface of the middle flow splitting plate (4) is an arc-shaped design. On the one hand, the arc surface can initially relieve the sulfuric acid solution and disperse part of the impact force. On the other hand, it can guide the sulfuric acid solution, so that the sulfuric acid solution flowing down along the inner wall of the main body cylinder (7) and the sulfuric acid solution split by the middle flow splitting plate (4) flow in opposite directions, collide and impact each other to cancel out, reducing the impact kinetic energy of the sulfuric acid.

[0040] The design of the two vortex buffer plates (3) with opposite spiral directions can divide the sulfuric acid falling between the two side diversion plates (2) into two parts. One part enters the vortex buffer plate (3), and the layers of vortex buffers in the vortex buffer plate (3) buffer the kinetic energy of the sulfuric acid solution.

[0041] The design of the two side diversion plates (2) in cooperation can divide the sulfuric acid solution entering from the liquid inlet pipe (1) into three parts, and then cooperate with the double-vortex structure and the double-diversion structure to disperse and offset the impact kinetic energy of the sulfuric acid, avoiding excessive impact load on the flow-blocking structure.

[0042] The design of the two vortex buffer plates (3) and the middle diversion plate (4) in cooperation can divide the sulfuric acid falling between the two side diversion plates (2) into two parts. One part enters the vortex buffer plate (3) and flows out from the auxiliary outlet pipe (9) after passing through the layers of vortex buffers in the vortex buffer plate (3). The other part is divided into two streams after passing through the diversion of the middle diversion plate (4), and then guided by the middle diversion plate (4), and then collides, offsets and disperses with the sulfuric acid solution flowing down the inner wall of the main cylinder (7) at the liquid outlet groove, reducing the impact kinetic energy of the sulfuric acid; achieving the purpose of first buffering the kinetic energy of the sulfuric acid through the double-vortex structure, and then dispersing the kinetic energy of the sulfuric acid through the double-diversion structure and then converging and offsetting each other.

Claims

1. An erosion-proof structure for a sulfuric acid tank, characterized in that: It is composed of a liquid inlet pipe, a side shunt plate, a vortex buffer plate, a middle shunt plate, a main liquid outlet pipe, a central convergence chamber, a main body cylinder, liquid outlet holes and an auxiliary liquid outlet pipe. The liquid inlet pipe is placed at the top of the main body cylinder and is connected to the inside of the main body cylinder. Two liquid outlet grooves are opened at the bottom of the main body cylinder. The liquid outlet grooves extend from one side of the main body cylinder to the other side. The main liquid outlet pipe is correspondingly connected to the liquid outlet grooves. The middle shunt plate is placed at the bottom of the main body cylinder and is located between the two liquid outlet grooves. Two side shunt plates are placed inside the main body cylinder. The two sides of the side shunt plate are correspondingly placed on the two sides of the main body cylinder. One end of the side shunt plate corresponds to the liquid inlet pipe. The vortex buffer plate is placed at the other end of the side shunt plate. The two vortex buffer plates have opposite rotation directions. The vortex buffer plate, the side shunt plate and the middle shunt plate cooperate to form a central convergence chamber. Liquid outlet holes are opened on the side wall of the main body cylinder corresponding to the center of the vortex buffer plate. The auxiliary liquid outlet pipe is connected to the liquid outlet holes.

2. The usage method of an erosion-proof structure for a sulfuric acid tank according to claim 1, characterized in that It includes the following steps: 1) Connect the liquid inlet pipe, the main liquid outlet pipe and the auxiliary liquid distribution pipe to the sulfuric acid production equipment respectively; 2) The sulfuric acid solution enters the main body cylinder from the liquid inlet pipe; 3) The two side shunt plates cooperate to divide the sulfuric acid solution into three parts, namely the sulfuric acid flowing towards the inner walls at both ends and the sulfuric acid falling between the two side shunt plates; 4) The sulfuric acid flowing along the inner wall of the main body cylinder towards both ends flows into the liquid outlet groove under the guidance of the outer wall of the vortex buffer plate and the inner wall of the main body cylinder; 5) When the sulfuric acid falling between the two side shunt plates passes through the vortex buffer plate, it is divided into two parts, namely the sulfuric acid solution entering the vortex buffer plate and the sulfuric acid solution passing through the central convergence chamber; 6) The sulfuric acid solution entering the vortex buffer plate undergoes layer-by-layer vortex buffering in the vortex buffer plate and then flows out from the auxiliary liquid outlet pipe; 7) The sulfuric acid solution passing through the central convergence chamber continues to fall, and after being shunted by the middle shunt plate, it is divided into two streams and flows into the liquid outlet groove; 8) The sulfuric acid solution flowing down along the inner wall of the main body cylinder at the liquid outlet groove and the sulfuric acid solution shunted by the middle shunt plate flow in opposite directions, then collide with each other to offset the kinetic energy, and finally flow out from the main liquid outlet pipe through the liquid outlet groove.

3. The erosion prevention structure for a sulfuric acid tank according to claim 1, characterized in that The two end faces of the main body cylinder bulge towards the outside of the main body cylinder to form an arc surface.

4. The erosion prevention structure for a sulfuric acid tank according to claim 1, wherein The top of the middle shunt plate bulges towards the inside of the main body cylinder to form a tip.

5. The erosion prevention structure for a sulfuric acid tank according to claim 4, characterized in that A protective sleeve made of acid-resistant material is placed on the tip.

6. The erosion prevention structure for a sulfuric acid tank according to claim 1, wherein The convex surface of the middle shunt plate is an arc surface. On the one hand, the arc surface can initially relieve the force of the sulfuric acid solution and disperse part of the impact force. On the other hand, it can guide the sulfuric acid solution so that the sulfuric acid solution flowing down along the inner wall of the main body cylinder and the sulfuric acid solution shunted by the middle shunt plate flow in opposite directions, collide with each other to offset, and reduce the impact kinetic energy of the sulfuric acid.

7. The erosion prevention structure for a sulfuric acid tank according to claim 1, characterized in that The design that the two vortex buffer plates have opposite rotation directions can divide the sulfuric acid falling between the two side shunt plates into two parts. One part enters the vortex buffer plate, and the layer-by-layer vortex buffering in the vortex buffer plate relieves and buffers the sulfuric acid kinetic energy of the sulfuric acid solution.

8. The anti-erosion structure for a sulfuric acid tank according to claim 1, characterized in that The design of the cooperation of the two side flow splitters can divide the sulfuric acid solution entering from the liquid inlet pipe into three parts, and then cooperate with the double vortex structure and the double flow splitting structure to disperse and offset the impact kinetic energy of the sulfuric acid, avoiding excessive impact load on the flow blocking structure.

9. The anti-erosion structure for a sulfuric acid tank according to claim 7, characterized in that The design of the cooperation of the two vortex buffer plates and the middle flow splitter can divide the sulfuric acid falling between the two side flow splitters into two parts. One part enters the vortex buffer plate and flows out from the auxiliary liquid outlet pipe after passing through the layers of vortex buffering of the vortex buffer plate. The other part is split into two streams by the middle flow splitter, and then guided by the middle flow splitter, and then collides, offsets and disperses with the sulfuric acid solution flowing down along the inner wall of the main cylinder at the liquid outlet tank, reducing the impact kinetic energy of the sulfuric acid.

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