CN102397748B

CN102397748B - A desulfurization absorption tower oxidation injection pipe

Info

Publication number: CN102397748B
Application number: CN201110413913.2A
Authority: CN
Inventors: 王秋平; 程爱平
Original assignee: Individual
Current assignee: Gansu Hequ Thermal Power Co ltd
Priority date: 2011-12-10
Filing date: 2011-12-10
Publication date: 2014-02-19
Anticipated expiration: 2031-12-10
Also published as: CN102397748A

Abstract

The invention discloses an oxidation spray pipe of a desulfurization absorption tower, and relates to a part of a desulfurization spray absorption tower, in particular to an oxidation spray pipe which promotes the oxidation process of slurry by using potential energy outside the tower. The pipe comprises a descending accelerating pipe (1) and a mixed diffusion pipe (2), wherein a suction accelerating hole (3) is formed on the pipe wall of the lower end of the descending accelerating pipe (1); a splash-proof pipe section (4) is sleeved at the periphery of the suction accelerating hole (3) of the descending accelerating pipe (1) and forms an annular space with the outer wall of the descending accelerating pipe (1); the upper end of the splash-proof pipe section (4) is open and is higher than the suction accelerating hole (3); the lower end of the splash-proof pipe section (4) is connected with the outer wall of the descending accelerating pipe (1); and the mixed diffusion pipe (2) is connected to the lower end of the descending accelerating pipe (1). The oxidation spray pipe has the advantages of simple structure and low manufacturing cost and maintenance cost.

Description

A kind of oxidation injection pipe of desulfurization absorption tower

Technical field

The present invention relates to desulfurization spray absorption tower accessory, be specifically related to utilize potential energy to promote the tower external oxidation playpipe of slurries oxidizing process.

Background technology

Desulfuration absorbing tower is to use physics and chemistry method, removes sulfur dioxide in flue gas (SO ₂) device or structures.

In multiple desulfuration absorbing tower, having a class absorption tower is spray absorption tower, its main working process is to utilize slurry circulating pump to be transported to by absorbing slurries the spraying layer consisting of a plurality of nozzles, after absorbing the atomizer ejection of slurries by spraying layer, form intensive atomization slurry spray district, slurries contact with flue gas in atomizing spray district, in contact process, absorb the SO in flue gas ₂deng pernicious gas, complete flue gas desulfurization, slurries descend slowly and lightly in the stock tank of bottom, absorption tower along inside, absorption tower.

Desulfurization also claims oxidation air with oxidation wind, is that the oxidation air that the equipment such as oxidation fan are provided is transported in pressure absorption tower slurries, for slurries provide oxygen, by the SO in slurries ₂, H ₂sO ₃, SO ₃ ^2-deng being oxidized to SO ₄ ^2-and with slurries in Ca ²⁺reaction forms CaSO ₄2H ₂o.

Oxidation air source of the gas has various ways, but is mainly the conveying that relies on external driver device to provide power to carry out oxidation air, has that complex structure, construction costs and maintenance cost are high, the shortcoming of inadequate energy-conserving and environment-protective.

Summary of the invention

Technical problem to be solved by this invention is: the object of this invention is to provide a kind of simple in structure, cost is low and maintenance cost is low a kind of oxidation injection pipe of desulfurization absorption tower.

Technical solution of the present invention is: it comprises decline accelerating tube and mixes anemostat, decline accelerating tube is provided with air-breathing acceleration hole in lower end tube wall, the periphery cover of decline accelerating tube in place, air-breathing acceleration hole has the outer wall of splashproof pipeline section and decline accelerating tube to form annular space, the upper end of splashproof pipeline section is uncovered and higher than air-breathing acceleration hole, the lower end of splashproof pipeline section is connected with decline accelerating tube outer wall, mix anemostat and be connected to decline accelerating tube lower end, described decline accelerating tube 1 lower end is outwards bell mouth shape expansion.

Technique effect of the present invention is: it have advantages of simple in structure, cost is low and maintenance cost is low, specific as follows:

1, can, for replacing oxidation fan or reducing exerting oneself of oxidation fan, reach energy-conservation effect.

2, the air that air-breathing acceleration hole sucks fully mixes within mixing anemostat, and mixed slurry reflux is to bottom, absorption tower, and flow process has increased by one times, has increased the time of contact of oxidation air and slurries, has improved the utilization rate of oxidation air.

3, lower for the plasm PH value spraying, be conducive to slurries oxidation.

If 4, mixing anemostat adopts and has higher flow velocity when the caliber identical with air-breathing acceleration hole can guarantee that slurry reflux enters absorption tower.Guarantee that slurry stream has higher kinetic energy.

5, the function that there is automatic adjusting inspiratory capacity the air-breathing conciliation of air intake duct chamber is accelerated in the decline of desulfuration absorbing tower high potential energy slurries, guarantees that operation is smooth and easy.

6, by adjusting the air inflow in the air-breathing acceleration of high potential energy slurries decline accelerating tube hole, absorption tower, can adjust oxidation air amount, can not cause exporting oxygen amount too high.

Accompanying drawing explanation

Fig. 1 is sectional structure chart of the present invention;

Fig. 2 is assembly structure schematic diagram of the present invention.

The specific embodiment

In Fig. 1, former smoke inlet 5, clean exhanst gas outlet 6, slurries gathering system 7, spray system 8.

As illustrated in fig. 1 and 2, it comprises decline accelerating tube 1 and mixes anemostat 2, decline accelerating tube 1 is provided with air-breathing acceleration hole 3 in lower end tube wall, the periphery cover of decline accelerating tube 1 in 3 places, air-breathing acceleration hole has splashproof pipeline section 4 and the outer wall of decline accelerating tube 1 to form annular space, the upper end of splashproof pipeline section 4 is uncovered and higher than air-breathing acceleration hole 3, the lower end of splashproof pipeline section 4 is connected with decline accelerating tube 1 outer wall, mixes anemostat 2 and is connected to decline accelerating tube 1 lower end.The annular space that splashproof pipeline section 4 and decline accelerating tube 1 surround has air-breathing conciliation and prevents the slurries function of splashing.

Described decline accelerating tube 1 lower end is outwards bell mouth shape expansion.

Described air-breathing acceleration hole 3 is axial long shape hole.。

Described air-breathing acceleration hole 3 is long ellipse hole.Also can adopt the slotted hole of other form

The lower port of decline accelerating tube 1 in 3 places, air-breathing acceleration hole and with mix anemostat 2 connections and all adopt the two-phase alloys steel plate of wear resistant corrosion resistant to make.Mixing anemostat 2 can adopt and the identical pipeline of accelerating tube 1 caliber that declines.

The concise and to the point process of the external oxidation injection pipe work of desulfuration absorbing tower slurries during operation:

1, the slurries that decline accelerating tube 1 receives from slurries gathering system 7 slurries absorption cells, slurries progressively accelerate in decline process, when through air-breathing acceleration hole 3, suction part air, slurries accelerate rapidly (acceleration herein approaches acceleration of gravity), and the mixture of slurries and air is back to absorption tower through mixing anemostat 2.

2, be back to the larger bubble of inside, absorption tower, under the effect of slurry stream, be sheared and form tiny bubble, tiny bubble is inner rising on absorption tower, completes further oxidation.

Claims

1. An oxidation injection pipe of a desulfurization absorption tower, characterized in that it includes a descending acceleration pipe (1) and a mixing diffuser pipe (2), and the descending acceleration pipe (1) is provided with a suction acceleration hole (3 ), the descending accelerating tube (1) is covered with a splash-proof tube section (4) on the outer periphery of the suction accelerating hole (3) to form an annular space with the outer wall of the descending accelerating tube (1), and the upper end of the splash-proof tube section (4) is open And higher than the suction acceleration hole (3), the lower end of the splash-proof pipe section (4) is connected to the outer wall of the descending acceleration pipe (1), and the mixing and diffusing pipe (2) is connected to the lower end of the descending accelerating pipe (1). The lower end of the tube (1) expands outwards in the shape of a bell mouth.

2. The oxidation injection pipe of the desulfurization absorption tower according to claim 1, characterized in that the suction acceleration hole (3) is an axial long hole.

3. The oxidation injection pipe of the desulfurization absorption tower according to claim 2, characterized in that, the suction acceleration holes (3) are oblong holes.