Absorption liquid uniform spraying device for demister of desulfurizing tower

Abstract

The utility model discloses an absorption liquid uniform spraying device of a demister of a desulfurizing tower, which comprises a circular mist catcher, a flow dividing pipe is coaxially and rotatably arranged above the circular mist catcher, a plurality of connecting pipes are communicated on the flow dividing pipe in a circumferential array, the liquid outlet end of each connecting pipe is fixedly communicated with a flat nozzle, and the flat nozzles are communicated with the circular mist catcher. The plurality of flat nozzles are distributed above the edge of the circular mist catcher in a circumferential array manner, a nozzle opening of each flat nozzle is close to one side of the shunt pipe and is arranged obliquely downwards, each nozzle and each connecting pipe synchronously rotate along the axis of the shunt pipe, each nozzle is in an oblique straight line shape, and each nozzle is gradually widened from top to bottom in the length direction; through the flat nozzles which are rotatably arranged, all areas of the mist catcher can be uniformly washed and cleaned, so that sulfate crystals attached to the mist catcher fall off, and the mist catcher is prevented from being locally blocked by the sulfate crystals.

Description

Technical Field

[0001] The utility model belongs to the technical field of demisting of desulfurization absorption towers, and more specifically is a device for uniformly spraying absorption liquid of a desulfurization tower demister. Background Art

[0002] In the desulfurization tower used in industrial desulfurization, the water vapor containing sulfate crystals generated in the reaction chamber will collide with the demister and then be discharged from the smoke outlet. During this process, the sulfate crystals will adhere to the mist catcher, so the mist catcher needs to be cleaned regularly. The traditional cleaning device is to set a spot bath cleaning device on the upper end of the mist catcher, but the spot bath cleaning device cannot evenly clean the area on the mist catcher, resulting in the mist catcher being partially blocked by sulfate crystals. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides an absorption liquid uniform spraying device for a desulfurization tower demister, which can uniformly rinse and clean all areas of the mist catcher, so that sulfate crystals attached to the mist catcher fall off, and avoid local blockage of the mist catcher by sulfate crystals.

[0004] Technical solution: In order to achieve the above-mentioned purpose, the utility model provides a uniform absorption liquid spraying device for a desulfurization tower demister, comprising a circular mist catcher, a diverter pipe coaxially mounted above the circular mist catcher, a plurality of connecting pipes connected in a circular array on the diverter pipe, the liquid outlet end of each connecting pipe is fixedly connected with a flat nozzle, a plurality of flat nozzles are distributed in a circular array above the edge of the circular mist catcher, and the nozzle of each flat nozzle is close to one side of the diverter pipe and is arranged obliquely downward, each nozzle and each connecting pipe rotates synchronously with the diverter pipe along the axis, the nozzle is in an oblique straight line shape, and the nozzle gradually widens from top to bottom along the length direction.

[0005] Furthermore, the extension line of the central symmetry line of the straight nozzle intersects with the axis of the infusion tube at an angle, so that the cross-section of the absorption liquid jet ejected from the nozzle is fan-shaped, and the two contour lines of the edge of the fan-shaped jet are respectively recorded as the inner jet contour line and the outer jet contour line. The lower end of the outer jet contour line intersects with the edge contour of the circular mist catcher, and the lower end of the inner jet contour line intersects with the contour of the central area of ​​the circular mist catcher.

[0006] Furthermore, the lower end of the fan-shaped jet ejected from the flat nozzle hits the upper surface of the circular mist catcher to form an impact surface, and the length direction of the impact surface extends along the radial direction of the circular mist catcher.

[0007] Furthermore, the closer the impact surface is to the central area of ​​the circular mist catcher, the narrower the width of the impact surface is.

[0008] Furthermore, the width of the impact surface close to one end of the diversion tube is L1, and the width of the impact surface away from one end of the diversion is L2. Suppose the inner circumference of the central area of ​​the circular mist catcher is C1, and the circumference of the edge area of ​​the circular mist catcher is C2, satisfying C1 / C2=L1 / L2.

[0009] Beneficial effect: The absorption liquid uniform spraying device of the desulfurization tower demister of the utility model can evenly rinse and clean all areas of the mist catcher through a rotating flat nozzle, so that the sulfate crystals attached to the mist catcher fall off, avoiding local blockage of the mist catcher by sulfate crystals. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic structural diagram of an absorption liquid uniform spraying device for a desulfurization tower demister of the utility model;

[0011] Figure 2 This is a schematic diagram of the absorption liquid jet ejected from the nozzle of the flat nozzle of the utility model connecting with the upper surface of the circular mist catcher;

[0012] Figure 3 This is a schematic structural diagram of the flat nozzle of the utility model. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] As attached Figures 1 to 3As shown, a desulfurization tower mist eliminator uniformly sprays an absorption liquid, comprising a circular mist catcher 1. The circular mist catcher 1 is a cylindrical structure with a circular outline composed of a plurality of multi-bend folded plates. A diverter pipe 4 is coaxially installed above the center of the circular mist catcher 1. A plurality of connecting pipes 5 are installed on the diverter pipe 4 in a circular array. The liquid outlet end of each connecting pipe 5 is fixedly connected to a flat nozzle 3. The plurality of flat nozzles 3 are distributed in a circular array above the edge of the circular mist catcher 1, and a nozzle 31 of each flat nozzle 3 is close to one side of the diverter pipe 4 and is arranged obliquely downward. Each nozzle 3 and each connecting pipe 5 rotates synchronously with the diverter pipe 4 along the axis. The nozzle 31 is an oblique straight line, and the nozzle 31 gradually widens from top to bottom along the length direction. Each nozzle 3 and each connecting pipe 5 rotates synchronously with the diverter pipe 4. When the circular mist catcher 1 needs During cleaning, several flat nozzles 3, driven by several connecting pipes 5, synchronously make circular motions around the axis of the circular mist catcher 1, and the absorption liquid is evenly sprayed onto the circular mist catcher 1 through the nozzles 31 on the several flat nozzles 3. In the desulfurization tower used for industrial desulfurization, the water vapor with sulfate crystals generated in the reaction chamber will rise from the bottom of the circular mist catcher 1 through the gap between the two folded plates and be discharged directly to the smoke outlet. In this process, the water vapor with sulfate crystals will collide with the folded plates, and the sulfate crystals will adhere to the folded plate surface of the circular mist catcher 1. Therefore, in order to more thoroughly clean the sulfate crystals crystallized on the circular mist catcher 1, the absorption liquid selected in this scheme is a weak alkaline solution for the reaction of sulfate crystals, so that the sulfate crystals can be dissolved faster, thereby comprehensively cleaning the circular mist catcher 1.

[0015] like Figure 1 As shown, the defogger device also includes an infusion pipe 6, which is coaxially installed at the center of the circular mist catcher 1. The lower end of the infusion pipe 6 is connected to the infusion end of the infusion device, and the upper end of the infusion pipe 6 is connected to the rotary joint 2. The rotary joint 2 is relatively fixed coaxially above the center of the circular mist catcher 1. The liquid outlet end of the upper part of the rotary joint 2 is coaxially rotated to connect the shunt pipe 4. The shunt pipe 4 is synchronously connected and connected to the water inlet end of the plurality of flat nozzles 3 through a plurality of connecting pipes 5; the shunt pipe 4 evenly absorbs the liquid transported by the infusion pipe 6. The absorption liquid is divided into several portions, and each portion is transported to each flat nozzle 3 through several connecting pipes 5; the rotary joint 2 is connected to the driving device. When the driving device drives the rotary joint 2, the diversion pipe 4 rotates around its own axis on the upper part of the rotary joint 2, and each flat nozzle 3 rotates synchronously with the diversion pipe 4 through the connecting pipe 5 connected thereto, and makes a circular motion above the circular mist catcher 1 around the axis of the circular mist catcher 1; during this process, the circular mist catcher 1 is stationary, and the rotary joint 2 is stationary relative to the circular mist catcher 1.

[0016] like Figure 1As shown, the nozzle 31 on the flat nozzle 3 is opened on the end surface of the flat portion of the flat nozzle 3, the midpoint line connecting the two ends of the nozzle 31 is the central symmetry line 37, the side lines on both sides of the nozzle 31 in the extension direction are respectively A side line 38 and B side line 39, the extension lines of the A side line 38 and the B side line 39 intersect with the central symmetry line 37, and the angles are equal, the extension line 34 of the central symmetry line 37 of the straight nozzle 31 intersects with the axis of the infusion tube 6 at an angle, and the angle range is 30° to 60°, so that the nozzle 31 is not too far away. The cross-section of the absorption liquid jet 33 ejected from the nozzle 31 is fan-shaped, and the two contour lines of the edge of the fan-shaped jet 33 are respectively recorded as the inner jet contour line 32B and the outer jet contour line 32A. The inner jet contour line 32B is ejected from the narrower end of the nozzle 31, and the outer jet contour line 32A is ejected from the wider end of the nozzle 31. The lower end of the outer jet contour line 32A intersects with the edge contour of the circular mist catcher 1, and the lower end of the inner jet contour line 32B intersects with the contour of the central area of ​​the circular mist catcher 1.

[0017] The lower end of the fan-shaped jet 33 ejected from the flat nozzle 3 hits the upper surface of the circular mist catcher 1 to form an impact surface 35, and the length direction of the impact surface 35 extends along the radial direction of the circular mist catcher 1; the closer the impact surface 35 is to the central area of ​​the circular mist catcher 1, the narrower the width of the impact surface 35.

[0018] The width of the impact surface 35 away from the diverter pipe 4 is L2, that is, the impact surface 35 away from the diverter pipe 4 intersects with the edge contour line of the circular mist catcher 1, and the two intersection points are the first intersection point 36a and the second intersection point 36b. The shortest line between the first intersection point 36a and the second intersection point 36b is L2.

[0019] The width of the impact surface 35 near one end of the diverter pipe 4 is L1, that is, the impact surface 35 near one end of the diverter pipe 4 intersects with the contour line of the central area of ​​the circular mist catcher 1, and the two intersection points are the third intersection point 36c and the fourth intersection point 36d, and the shortest line between the third intersection point 36c and the fourth intersection point 36d is L2. Assume that the inner circle circumference of the central area of ​​the circular mist catcher 1 is C1, and the circumference of the edge area of ​​the circular mist catcher 1 is C2, satisfying C1 / C2=L1 / L2.

[0020] After the circular mist collector 1 absorbs the sulfate-containing gas generated by the desulfurization tower for a long time, it is necessary to clean the circular mist collector 1. At this time, the infusion device is started first. The infusion device conveys the absorption liquid to the infusion pipe 6 at a fixed flow rate. The shunt pipe 4 evenly divides the absorption liquid conveyed by the infusion pipe 6 into several parts, and conveys each part of the absorption liquid to each flat nozzle 3 through several connecting pipes 5, so that the flow rate of the absorption liquid sprayed from the nozzle 31 of each flat nozzle 3 is equal. The absorption liquid is evenly sprayed onto the circular mist collector 1 through the nozzles 31 of several flat nozzles 3. The bottom contour line of the fan-shaped jet 33 of the detergent sprayed from the nozzle 31 of each flat nozzle 3 intersects with the upper surface of the circular mist collector 1 and is formed on the circular mist collector. An impact surface 36 is formed on the circular mist catcher 1, and then the driving device is started. While the driving device drives the diverter pipe 4 to rotate around the axis of the rotating joint 2 at the upper part of the rotating joint 2, each flat nozzle 3 rotates synchronously with the diverter pipe 4 through the connecting pipe 5, and each flat nozzle 3 makes a circular motion around the axis of the circular mist catcher 1. With each rotation, the area swept by the fan-shaped jet 33 of absorption liquid sprayed from the nozzle 31 of each flat nozzle 3 and the intersection area 36 of the upper surface of the circular mist catcher 1 is equal to the area of ​​the upper surface of the circular mist catcher 1, so that the absorption liquid sprayed by several flat nozzles 3 onto the circular mist catcher 1, at the same time, the absorption liquid flow rate sprayed onto the central area of ​​the circular mist catcher 1 is equal to the absorption liquid flow rate of the edge area of ​​the circular mist catcher 1.

[0021] The above is the preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for uniformly spraying absorption liquid for a desulfurization tower demister, characterized by: The invention comprises a circular mist catcher (1), wherein a diverter pipe (4) is coaxially rotatably mounted above the circular mist catcher (1), and a plurality of connecting pipes (5) are connected to the diverter pipe (4) in a circular array, and the liquid outlet end of each connecting pipe (5) is fixedly connected to a flat nozzle (3), and the plurality of flat nozzles (3) are distributed in a circular array above the edge of the circular mist catcher (1), and the nozzle (31) of each flat nozzle (3) is close to one side of the diverter pipe (4) and is arranged obliquely downward, and each nozzle (3) and each connecting pipe (5) rotate synchronously along the axis with the diverter pipe (4), and the nozzle (31) is in an oblique straight line shape, and the nozzle (31) gradually widens from top to bottom along the length direction.

2. The absorption liquid uniform spraying device for a desulfurization tower demister according to claim 1, characterized in that: The extension line (34) of the central symmetry line (37) of the straight nozzle (31) intersects with the axis of the liquid infusion tube (6) at an angle, so that the cross-section of the absorption liquid jet (33) ejected from the nozzle (31) is fan-shaped, and the two contour lines of the edge of the fan-shaped jet (33) are respectively recorded as the inner jet contour line (32B) and the outer jet contour line (32A). The lower end of the outer jet contour line (32A) intersects with the edge contour of the circular mist catcher (1), and the lower end of the inner jet contour line (32B) intersects with the contour of the central area of ​​the circular mist catcher (1).

3. The absorption liquid uniform spraying device for a desulfurization tower demister according to claim 2, characterized in that: The lower end of the fan-shaped jet (33) ejected from the flat nozzle (3) impacts the upper surface of the circular mist catcher (1) to form an impact surface (35), and the length direction of the impact surface (35) extends along the radial direction of the circular mist catcher (1).

4. The absorption liquid uniform spraying device for a desulfurization tower demister according to claim 3, characterized in that: The closer the impact surface (35) is to the central area of ​​the circular mist catcher (1), the narrower the width of the impact surface (35) is.

5. The absorption liquid uniform spraying device for a desulfurization tower demister according to claim 3, characterized in that: The width of the impact surface (35) close to one end of the diverter tube (4) is L1, and the width of the impact surface (35) away from one end of the diverter tube (4) is L2. Assuming that the inner circumference of the central area of ​​the circular mist catcher (1) is C1 and the circumference of the edge area of ​​the circular mist catcher (1) is C2, C1 / C2=L1 / L2 is satisfied.

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