A spray pipe structure for reducing the risk of terminal scaling

Abstract

The present invention proposes a spray pipe structure that reduces the risk of scaling at the end, which is installed on a support seat on the inner wall of a spray tower cylinder, and includes a spray main pipe, a spray branch pipe, a nozzle, a blind plate, a reinforced sealing ring and a head. The end of the spray main pipe is fixed on the support seat, and a plurality of spray branches are connected to the spray main pipe. The spray branch pipe is equipped with a nozzle, and the head is installed in the inner wall of the end of the spray main pipe. The blind plate is fixed between the spray branch pipe closest to the end in the spray main pipe and the head. A reinforced sealing ring is provided on the side of the blind plate facing away from the end of the spray main pipe, and the outer ring of the reinforced sealing ring abuts against the inner wall of the spray main pipe. The spray pipe structure can avoid the problem of slurry deposition and scaling falling off in the spray pipe at the end, and then spraying out by the edge nozzle, so as to reduce the cost of inspection and maintenance and ensure the desulfurization efficiency.

Description

[Technical field]

[0001] The invention relates to the technical field of flue gas desulfurization equipment, and in particular to a spray pipeline structure for reducing the risk of terminal scaling. [Background technology]

[0002] At present, my country's thermal power, steel, metallurgy, cement and other industries mainly use wet flue gas desulfurization technology to remove sulfur dioxide from flue gas, and the absorbent spray system is one of the most important components inside the desulfurization tower.

[0003] One of the main reasons why the desulfurization efficiency of conventional desulfurization towers is not high enough is that the design of the absorbent spray system is not reasonable. The slurry spray system of the desulfurization spray empty tower is generally composed of layered spray layers, each of which includes a spray main pipe, a spray branch pipe, and a nozzle. The end of the spray layer close to the tower wall is an area with weak spray coverage, which is prone to flue gas escape and reduces the desulfurization efficiency.

[0004] like Figure 1 The structure of the tail end of a conventional absorbent spraying system is shown. In order to reduce the scouring of the absorbent sprayed by the edge nozzle 6 on the inner wall of the spray tower barrel 1, the distance between the edge nozzle close to the inner wall of the spray tower barrel 1 and the spray tower barrel is generally 0.6 to 1m, and the end of the spray main pipe is fixed on the support seat of the inner wall of the spray tower barrel, so the length a between the end face of the spray main pipe and the nearest spray branch pipe is generally more than 0.5m. The prior art adopts a structure in which a pipe cap is directly set at the end of the spray pipe, which easily forms slurry deposits and scaling at the end of the spray pipe. When the absorbent spray system is started and stopped, these deposits and scaling are easy to fall off and flow to the spray branch pipe and the edge nozzle with the absorbent, which poses a risk of clogging the spray branch pipe and the edge nozzle, affecting the spray coverage rate and reducing the desulfurization efficiency. The deposits and scaling sprayed out from the edge nozzle will scour the inner wall of the spray tower cylinder, increasing the inspection and maintenance costs. In addition, the pipe cap set at the end of the spray pipe is prone to damage and falling off during transportation, installation and operation. [Summary of the invention]

[0005] The purpose of the present invention is to solve the problems in the prior art and to propose a spray pipe structure that reduces the risk of terminal scaling. This can avoid the problem of slurry deposition and scaling falling off in the terminal spray pipe and then being sprayed out by the edge nozzle, so as to reduce the inspection and maintenance costs and ensure the desulfurization efficiency.

[0006] To achieve the above-mentioned purpose, the present invention proposes a spray pipe structure that reduces the risk of scaling at the end, which is installed on a support seat on the inner wall of a spray tower cylinder, and includes a spray main pipe, a spray branch pipe, a nozzle, a blind plate, a reinforcement sealing ring and a head. The end of the spray main pipe is fixed on the support seat, and a plurality of spray branch pipes are connected to the spray main pipe. The spray branch pipes are equipped with nozzles. The head is installed in the inner wall of the end of the spray main pipe. The blind plate is fixed between the spray branch pipe closest to the end in the spray main pipe and the head. A reinforcement sealing ring is provided on the side of the blind plate facing away from the end of the spray main pipe, and the outer ring of the reinforcement sealing ring is against the inner wall of the spray main pipe.

[0007] Preferably, the axis of the blind plate coincides with the axis of the spray main pipe, and the shortest axial distance L between the blind plate and the inner wall of the spray branch pipe closest to the end position of the spray main pipe is no more than 100 mm.

[0008] Preferably, the blind plate is a circular or elliptical plate, the diameter of which is less than or equal to the inner diameter of the spray main pipe, and the thickness of the blind plate is 10 to 60 mm.

[0009] Preferably, the reinforced sealing ring is an annular structure, including a retaining ring and a convex edge arranged on the outer ring of the retaining ring and bent toward the side away from the blind plate, the retaining ring abuts against the blind plate, and the outer ring of the convex edge abuts against the inner wall of the spray pipe.

[0010] Preferably, an annular limiting step and a sealing protrusion ring are provided on one side of the blind plate close to the reinforcement sealing ring, an introduction conical surface is provided at the corner outside the limiting step, the outer ring of the limiting step abuts against the inner ring of the retaining ring, a sealing protrusion ring is provided on the outer side of the limiting step, and the sealing protrusion ring abuts against the side end face of the retaining ring.

[0011] Preferably, the axis of the end cap coincides with the axis of the spray pipe, and the end cap adopts a different-diameter built-in end cap, including a mounting portion and a diameter reduction portion arranged in sequence from the end of the spray pipe to the other end, the mounting portion is fixed to the end of the spray pipe, the outer wall of the mounting portion abuts against the inner wall of the end of the spray pipe, and the end of the diameter reduction portion close to the blind plate has a sealing plate, and the distance b between the sealing plate and the end face of the end of the spray pipe is not less than 50 mm.

[0012] Preferably, the mounting portion and the diameter-reducing portion are connected via a transition conical surface whose inner diameter gradually decreases.

[0013] Preferably, the spray main pipe, spray branch pipe, blind plate, reinforced sealing ring and head are all made of glass fiber reinforced plastics with wear-resistant and anti-corrosion layers lined on the inner and outer surfaces.

[0014] Beneficial effects of the present invention: The present invention sets a blind plate structure at the end of the spray main pipe, and the blind plate and the reinforced sealing ring can be completely sealed with the inner wall of the spray main pipe to prevent the absorbent from leaking to the other side of the blind plate, thereby effectively avoiding the formation of deposited scale at the end of the spray main pipe. This structure can be used in various wet flue gas desulfurization systems such as the double alkali method, carbide slag method and lime-gypsum method.

[0015] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the structure of the tail end of a conventional absorbent spray system;

[0017] Figure 2 It is a schematic diagram of the internal structure of a spray pipe structure for reducing the risk of terminal scaling according to the present invention;

[0018] Figure 3 yes Figure 2 A-direction schematic diagram;

[0019] Figure 4 It is a cross-sectional schematic diagram of a head of a spray pipe structure for reducing the risk of scaling at the end of the present invention;

[0020] Figure 5 It is a cross-sectional schematic diagram of a reinforced sealing ring of a spray pipe structure for reducing the risk of scaling at the end of the present invention;

[0021] Figure 6 is a cross-sectional schematic diagram of a blind plate according to a first embodiment of the present invention;

[0022] Figure 7 4 is a cross-sectional schematic diagram of a blind plate according to a second embodiment of the present invention. [Specific implementation method]

[0023] Example 1

[0024] See also Figures 2 to 6 The present invention discloses a spray pipe structure for reducing the risk of scaling at the end, which is installed on a support seat 2 on the inner wall of a spray tower cylinder 1, and comprises a spray main pipe 3, a spray branch pipe 4, a nozzle 5, a blind plate 6, a reinforcement sealing ring 7 and a head 8. The end of the spray main pipe 3 is fixed on the support seat 2, and a plurality of spray branch pipes 4 are connected to the spray main pipe 3. The spray branch pipe 4 is equipped with a nozzle 5. The head 8 is installed in the inner wall of the end of the spray main pipe 3. The blind plate 6 is fixed between the spray branch pipe 4 closest to the end in the spray main pipe 3 and the head 8. A reinforcement sealing ring 7 is provided on the side of the blind plate 6 facing away from the end of the spray main pipe 3, and the outer ring of the reinforcement sealing ring 7 is against the inner wall of the spray main pipe 3.

[0025] Further, see Figure 2 The axis of the blind plate 6 coincides with the axis of the spray main pipe 3 and is vertically fixed to the inner wall of the spray main pipe 3 to prevent the absorbent from leaking to the other side of the blind plate 6. The axial minimum distance L between the blind plate 6 and the inner wall of the spray branch pipe 4 closest to the end position of the spray main pipe 3 is not greater than 100 mm. Figure 2 As shown, the formation of deposited scale at the end of the spray main pipe 3 is avoided.

[0026] Further, see Figure 6 The blind plate 6 is a circular or elliptical plate with a diameter less than or equal to the inner diameter of the spray main pipe 3. The blind plate 6 has a thickness of 10 to 60 mm to ensure sufficient strength.

[0027] Further, see Figure 5 The reinforcement seal ring 7 is an annular structure, including a retaining ring 71 and a convex edge 72 disposed on the outer ring of the retaining ring 71 and bent toward the side facing away from the blind plate 6. The retaining ring 71 abuts against the blind plate 6, and the outer ring of the convex edge 72 abuts against the inner wall of the spray main pipe 3. The reinforcement seal ring 7 plays a role of reinforcement and sealing.

[0028] Further, see Figure 4 The axis of the end cap 8 coincides with the axis of the spray pipe 3. The end cap 8 adopts a different diameter built-in end cap, including a mounting portion 81 and a diameter reduction portion 82 arranged in sequence from the end of the spray pipe 3 to the other end. The mounting portion 81 is fixed to the end of the spray pipe 3. The outer wall of the mounting portion 81 abuts against the inner wall of the end of the spray pipe 3. The end of the diameter reduction portion 82 close to the blind plate 6 has a sealing plate 820. The distance b between the sealing plate 820 and the end face of the end of the spray pipe 3 is not less than 50 mm. Figure 2 shown.

[0029] Further, see Figure 4 The mounting portion 81 and the diameter-reducing portion 82 are connected via a transition conical surface 800 whose inner diameter gradually decreases.

[0030] Furthermore, the spray main pipe 3, the spray branch pipe 4, the blind plate 6, the reinforced sealing ring 7 and the head 8 are all made of glass fiber reinforced plastics with wear-resistant and anti-corrosion layers lined on the inner and outer surfaces.

[0031] Example 2

[0032] See also Figure 7, the difference from Example 1 is that: the blind plate 6 is provided with an annular limiting step 61 and a sealing protrusion ring 62 on the side close to the reinforcement sealing ring 7, the corner of the outer side of the limiting step 61 is provided with an introduction conical surface 611, the outer ring of the limiting step 61 abuts against the inner ring of the retaining ring 71, the outer side of the limiting step 61 is provided with a sealing protrusion ring 62, the sealing protrusion ring 62 abuts against the side end surface of the retaining ring 71, and the reinforcement sealing ring 7 plays a reinforcing and sealing role.

[0033] Working process of the present invention:

[0034] The present invention discloses a spray pipe structure that reduces the risk of scaling at the end. By setting a blind plate at the end of the spray pipe and making the distance between the blind plate and the spray branch pipe smaller, the formation of deposited scaling at the end of the spray pipe can be avoided. By setting a reinforced sealing ring on one side of the blind plate, the blind plate can be completely sealed with the inner wall of the spray pipe to prevent the absorbent from leaking to the other side of the blind plate, and the strength can be improved to a certain extent. The end cap is set inside the end of the spray pipe, which can avoid the problem of damage and falling off during transportation, installation and operation.

[0035] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A spray pipe structure for reducing the risk of scaling at the end, mounted on a support seat (2) on the inner wall of a spray tower cylinder (1), characterized in that: The invention comprises a spray main pipe (3), a spray branch pipe (4), a nozzle (5), a blind plate (6), a reinforcement sealing ring (7) and a head (8), wherein the end of the spray main pipe (3) is fixed on a support seat (2), a plurality of spray branch pipes (4) are connected to the spray main pipe (3), the spray branch pipe (4) is provided with a nozzle (5), the head (8) is installed in the inner wall of the end of the spray main pipe (3), the blind plate (6) is fixed between the spray branch pipe (4) closest to the end of the spray main pipe (3) and the head (8), the side of the blind plate (6) facing away from the end of the spray main pipe (3) is provided with a reinforcement sealing ring (7), the outer ring of the reinforcement sealing ring (7) is in contact with the inner wall of the spray main pipe (3), and the reinforcement sealing ring (7) is provided on the side of the blind plate (6) facing away from the end of the spray main pipe (3). ) is an annular structure, comprising a retaining ring (71) and a convex edge (72) arranged on the outer ring of the retaining ring (71) and bent toward a side facing away from the blind plate (6), the retaining ring (71) abuts against the blind plate (6), the outer ring of the convex edge (72) abuts against the inner wall of the spray main pipe (3), the blind plate (6) is provided with an annular limiting step (61) and a sealing protruding ring (62) on the side close to the reinforcement sealing ring (7), the outer corner of the limiting step (61) is provided with an introduction conical surface (611), the outer ring of the limiting step (61) abuts against the inner ring of the retaining ring (71), the outer side of the limiting step (61) is provided with a sealing protruding ring (62), and the sealing protruding ring (62) abuts against the side end surface of the retaining ring (71).

2. A spray pipe structure for reducing the risk of terminal scaling as claimed in claim 1, characterized in that: The axis of the blind plate (6) coincides with the axis of the spray main pipe (3), and the closest axial distance L between the blind plate (6) and the inner wall of the spray branch pipe (4) closest to the end position of the spray main pipe (3) is no more than 100 mm.

3. A spray pipe structure for reducing the risk of terminal scaling as claimed in claim 1, characterized in that: The blind plate (6) is a circular or elliptical plate, the diameter of which is less than or equal to the inner diameter of the spray main pipe (3), and the thickness of the blind plate (6) is 10 to 60 mm.

4. A spray pipe structure for reducing the risk of terminal scaling as claimed in claim 1, characterized in that: The axis of the end cap (8) coincides with the axis of the spray pipe (3). The end cap (8) is a reduced-diameter built-in end cap, comprising a mounting portion (81) and a diameter reduction portion (82) arranged in sequence from the end of the spray pipe (3) to the other end. The mounting portion (81) is fixed to the end of the spray pipe (3). The outer wall of the mounting portion (81) abuts against the inner wall of the end of the spray pipe (3). The end of the diameter reduction portion (82) close to the blind plate (6) has a sealing plate (820). The distance b between the sealing plate (820) and the end face of the end of the spray pipe (3) is not less than 50 mm.

5. A spray pipe structure for reducing the risk of terminal scaling as claimed in claim 4, characterized in that: The mounting portion (81) and the diameter-reducing portion (82) are connected via a transition conical surface (800) with a gradually decreasing inner diameter of the cross section.

6. A spray pipe structure for reducing the risk of terminal scaling as claimed in claim 1, characterized in that: The spray main pipe (3), spray branch pipe (4), blind plate (6), reinforced sealing ring (7) and end cap (8) are all made of glass fiber reinforced plastics with wear-resistant and anti-corrosion layers on the inner and outer surfaces.

Images