CN213132647U

CN213132647U - Inlet flue device of wet desulphurization spray tower

Info

Publication number: CN213132647U
Application number: CN202020786680.5U
Authority: CN
Inventors: 贾荣斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-05-07
Anticipated expiration: 2030-05-13

Abstract

The utility model relates to an entry flue device of wet flue gas desulfurization spray column, including flue pipeline and dust removal guiding device: the flue pipeline comprises an air inlet flue, a pressurization dust removal bin flue, a steering flue, a diffusion dust prevention bin flue and an inlet pipeline which are connected in sequence; the dust removal flow guide device comprises a pressurization dust removal bin, a wedge obstacle and a diffusion dust resistance bin, wherein the pressurization dust removal bin is arranged in a flue of the pressurization dust removal bin, and the diffusion dust resistance bin is arranged in a flue of the diffusion dust resistance bin; the pressurized dedusting bin comprises a bin body of the pressurized dedusting bin, the bin body of the pressurized dedusting bin is divided into an upper part and a lower part, the upper half part of the bin body is a cylindrical bin, the lower half part of the bin body is an inverted conical frustum-shaped ash storage area, and the lowermost end of the pressurized dedusting bin is provided with an ash discharge port; and the wedge-shaped barrier is positioned at the joint of the flue of the pressurized dust removal bin and the air inlet flue.

Description

Inlet flue device of wet desulphurization spray tower

Technical Field

The utility model relates to a flue gas desulfurization technical field, in particular to wet flue gas desulfurization spray column's entry flue device.

Background

The wet flue gas desulfurization environmental protection technology (FGD) is a leading technology for flue gas desulfurization of thermal power plants at home and abroad due to the characteristics of high desulfurization rate, wide coal quality application range, mature process technology, long stable operation period, small load change influence, large flue gas treatment capacity and the like. The chemical reaction of the sulfur dioxide is extremely fast, the spray tower has simple structure and mature and reliable process, and the extremely fast reaction which can meet the requirement of sulfur dioxide absorption with continuous phase of gas phase, high turbulence degree and large phase interface is widely applied to various large and medium thermal power plants and medium and small low-sulfur flue gas treatment.

However, because the dust content in the flue gas treated by the spray tower is high, the high-temperature and high-speed flue gas at the inlet usually impacts the tower wall and the supporting beam to form erosion, and causes accidents such as reduction of desulfurization efficiency, abrasion, scaling or blockage of rotating machinery such as a demister, a gas-gas heat exchanger (GGH) and a circulating slurry pump and equipment such as subsequent dehydration, and the like, and a large amount of capital transformation is needed to be spent, so that great economic loss is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an entry flue device of wet flue gas desulfurization spray column, including flue pipeline and dust removal guiding device:

the flue pipeline comprises an air inlet flue, a pressurization dust removal bin flue, a steering flue, a diffusion dust prevention bin flue and an inlet pipeline which are connected in sequence;

the dust removal flow guide device comprises a pressurization dust removal bin, a wedge obstacle and a diffusion dust resistance bin, wherein the pressurization dust removal bin is arranged in a flue of the pressurization dust removal bin, and the diffusion dust resistance bin is arranged in a flue of the diffusion dust resistance bin;

the pressurized dedusting bin comprises a bin body of the pressurized dedusting bin, the bin body of the pressurized dedusting bin is divided into an upper part and a lower part, the upper half part of the bin body is a cylindrical bin, the lower half part of the bin body is an inverted conical frustum-shaped ash storage area, and the lowermost end of the pressurized dedusting bin is provided with an ash discharge port;

the wedge-shaped barrier is positioned at the joint of the flue of the pressurized dust removal bin and the air inlet flue;

a plurality of guide plates which are axially arranged are arranged in the steering flue;

the horizontal included angle of the inlet pipeline is 15-45 degrees;

the gas outlet end of the inlet pipeline is positioned above the liquid level of the desulfurization tower slurry pool or extends below the liquid level of the desulfurization tower slurry pool;

the mass concentration of the smoke dust in the inlet pipeline is less than 30 mg/cubic meter;

a dust blocking plate is arranged in a flue of the diffusion dust blocking bin, and the horizontal included angle of the dust blocking plate is larger than that of the inlet pipeline;

the lower part of the diffusion dust-resistant bin flue is provided with a dust collecting basin which is used for collecting dust on the dust-resistant plate and discharging the dust through a bottom dust outlet;

the wet desulphurization spray tower adopts a limestone-gypsum desulphurization process.

The beneficial effects of the utility model reside in that:

the flue structures such as a wedge obstacle, a pressurization dust removal bin, a diffusion dust resistance bin and the like in the flue are additionally arranged in the inlet flue, the dust removal efficiency of the flue gas is improved by 50-70% under the combined action of all the parts, the problems in the existing wet desulphurization technology are solved, for example, a desulphurization tower is directly used for dust removal to scale and block a demister and a GGH, the complex requirements on design selection, pole matching form, coal type selection and smoke physicochemical characteristics in an electric dust remover are met, the energy loss of a bag type dust remover is large, the cost of an electric-bag composite dust remover is high, and the like. Use the utility model discloses a spray the quinoline tower and not only can show the dust content that reduces the flue gas, reduce the equipment trouble of spray column, improve desulfurization efficiency, also need not to destroy spray column's structure on the architectural design, do not influence spray column's structural strength and stability, and low cost, installation are convenient, the attrition rate is low.

The utility model changes the flow field speed and the pressure distribution of the flue gas jet flow by using the wedge obstacles in the pressurizing dust removal bin, simultaneously increases the radial, tangential and axial flow rates of the flue gas in the pressurizing dust removal bin, particularly increases the inertial centrifugal force of large-particle-diameter particles and fibrous dust in the pressurizing dust removal bin due to the increase of the tangential speed, is easy to form a cluster, is easy to enter the external circulation and obtains good dust removal effect; the residual dust is settled by combining the diffusion effect and the selection of the position direction of the dust blocking plate in the diffusion dust blocking bin, so that the dust removal efficiency is further improved.

Drawings

Fig. 1 is a schematic view of an inlet flue device of a wet desulphurization spray tower in an embodiment of the present invention;

illustration of the drawings: 1-an air inlet flue; 2-pressurizing a flue of the dust removal bin; 21-a pressurized dust removal bin; 22-wedge obstacles; 23-ash storage area; 24-ash discharge port; 3-turning a flue; 31-a baffle; 4-diffusion dust-proof bin flue; 41-diffusion dust-blocking bin; 42-dust blocking plate; 43-connecting an ash pan; 44-ash outlet; 5-an inlet duct; 51-outlet end of inlet pipe.

Detailed Description

Example (b):

fig. 1 is a schematic view of an inlet flue device of the present invention, which includes an air inlet flue 1, a pressurized dust removal bin flue 2, a turning flue 3, a diffusion dust blocking bin flue 4 and an inlet pipe 5 connected in sequence; the device comprises a pressurizing dust removal bin 21, a wedge obstacle 22 and a diffusion dust blocking bin 41, wherein the pressurizing dust removal bin 21 is arranged in a pressurizing dust removal bin flue 2, and the diffusion dust blocking bin 41 is arranged in a diffusion dust blocking bin flue 4;

the pressurized dust removal bin 21 comprises a bin body of the pressurized dust removal bin 21, the bin body of the pressurized dust removal bin 21 is divided into an upper part and a lower part, the upper half part is a cylindrical bin, the lower half part is an inverted conical frustum-shaped dust storage area 23, and the lowermost end of the pressurized dust removal bin is provided with a dust discharge port 24;

the wedge-shaped barrier 22 is positioned at the joint of the pressurizing dust removal bin flue 2 and the air inlet flue 1;

a plurality of guide plates 31 which are axially arranged are arranged in the diversion flue 3;

the horizontal included angle of the inlet pipeline 5 is 15-45 degrees; the gas outlet end 51 of the inlet pipeline is above the liquid level of the slurry pool of the desulfurization tower or extends below the liquid level of the slurry pool of the desulfurization tower;

a dust-blocking plate 42 is arranged in the diffusion dust-blocking bin flue 4, and the horizontal included angle of the dust-blocking plate 42 is larger than that of the inlet pipeline 5; the lower part of the diffusion dust-resistant bin flue 4 is provided with a dust collecting basin 43 which is used for collecting dust on the dust-resistant plate 42 and discharging the dust through a bottom dust outlet 44;

the wet desulphurization spray tower adopts a limestone-gypsum desulphurization process, and the mass concentration of smoke dust in an inlet pipeline is less than 30 mg/cubic meter.

Claims

1. The utility model provides an entry flue device of wet flue gas desulfurization spray column, includes flue duct and dust removal guiding device, its characterized in that:

and the wedge-shaped barrier is positioned at the joint of the flue of the pressurized dust removal bin and the air inlet flue.

2. The inlet flue device of a wet desulfurization spray tower according to claim 1, wherein a plurality of axially arranged baffles are disposed in said turn flue.

3. The inlet flue device of the wet desulfurization spray tower of claim 2, wherein the horizontal included angle of the inlet pipe is 15-45 degrees.

4. The inlet flue device of the wet desulphurization spray tower according to any one of claims 1-3, wherein a dust-blocking plate is installed in the flue of the diffusion dust-blocking bin, and the horizontal included angle of the dust-blocking plate is larger than that of the inlet pipeline.

5. The inlet flue device of the wet desulphurization spray tower as recited in claim 4, wherein the diffusion dust-blocking bin flue is provided with a dust-receiving basin at the lower part thereof for collecting the dust on the dust-blocking plate and discharging the dust through the bottom dust outlet.

6. The inlet flue device of the wet desulfurization spray tower of claim 1, wherein: the wet desulphurization spray tower adopts a limestone-gypsum desulphurization process.

7. The inlet flue device of the wet desulfurization spray tower of claim 6, wherein: and the gas outlet end of the inlet pipeline is positioned above the liquid level of the slurry pool of the desulfurization tower or extends below the liquid level of the slurry pool of the desulfurization tower.

8. The inlet flue device of the wet desulfurization spray tower of claim 1, wherein: the mass concentration of the smoke dust in the inlet pipeline is less than 30 mg/cubic meter.