CN210114977U

CN210114977U - Spraying-free efficient desulfurization device

Info

Publication number: CN210114977U
Application number: CN201822100875.5U
Authority: CN
Inventors: 宋端阳; 采有林; 秦省军; 李计珍; 王存; 高智鹰
Original assignee: Beijing SPC Environment Protection Tech Co Ltd
Current assignee: Beijing SPC Environment Protection Tech Co Ltd
Priority date: 2018-12-14
Filing date: 2018-12-14
Publication date: 2020-02-28
Anticipated expiration: 2028-12-14

Abstract

The utility model discloses a spray-free high-efficiency desulfurization device, which comprises an outer cylinder (3), a slurry supply pipe (2) arranged in the outer cylinder (3) and m desulfurization units, wherein m is more than or equal to 1; the desulfurization unit comprises an impeller (1) and a flue gas accelerator (4), wherein n grid bars are densely and uniformly distributed on the diameter-reducing part of the flue gas accelerator (4), and n is more than or equal to 1. The utility model provides a pair of do not have high-efficient desulphurization unit that sprays, the device supplies the thick liquid through supplying thick liquid pipe (2), supply to have no nozzle on the thick liquid pipe, the thick liquid is when flue gas accelerator (4) are flowed through downwards because of the action of gravity, break up by the flue gas and generate a large amount of small liquid drops, play the effect of similar nozzle, can reach very high efficiency in the aspect of the desulfurization, the device can be according to the flue gas volume size, select the quantity that needs this device, and arrange according to local conditions, the restriction in place has been avoided.

Description

Spraying-free efficient desulfurization device

Technical Field

The utility model relates to an energy-concerving and environment-protective technical field especially relates to a do not have high-efficient desulphurization unit that sprays.

Background

At present, in the wet flue gas desulfurization industry, the reaction principle is basically the same, namely acidic SO2 gas in the flue gas reacts with alkaline reaction solution, but the realization mode of gas-liquid mass transfer is different to determine the reaction efficiency, resistance and reliability of the system. At present, most of power plant flue gas desulfurization is to arrange two to three layers of nozzles in an absorption tower, and spray the whole cross section of the absorption tower at a high coverage rate, wherein the coverage rate is generally required to reach 200-250% so as to meet the requirement of gas-liquid mass transfer area. The construction difficulty and material cost of the desulfurization tower are high due to the need of arranging a large number of nozzles. Meanwhile, the required slurry outlet pressure head is large, the number of circulating pumps is large, the required power is large, and the operation cost is high. In addition, the spray nozzle is often blocked or damaged due to the falling of an anticorrosive coating or the overlarge concentration of slurry in the operation process, so that the operation reliability of the desulfurizing tower is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a spray-free high-efficiency desulfurization device, which comprises an outer cylinder (3), a slurry supply pipe (2) arranged inside the outer cylinder (3) and m desulfurization units, wherein m is more than or equal to 1; the desulfurization unit comprises an impeller (1) and a flue gas accelerator (4), wherein n grid bars are densely and uniformly distributed on the diameter-reducing part of the flue gas accelerator (4), and n is more than or equal to 1.

Further, the impeller (1) is aligned with the axis of the flue gas accelerator (4) and is tightly attached to the flue gas accelerator.

Further, the flue gas accelerator (4) is a venturi, n grid bars are densely and uniformly distributed at the reducing part of the venturi, and n is more than or equal to 1.

Furthermore, the grid bars are 10cm-20cm long, 5 mm-10 mm wide and 6 mm-10 mm in gap.

Furthermore, the grid bars arranged on the flue gas accelerator (4) are made of wear-resistant and corrosion-resistant ductile materials.

Furthermore, the grid arranged on the flue gas accelerator (4) is made of stainless steel or PPR plastic.

Further, the pulp supply pipe (2) is vertically downward along the center of the outer cylinder (3).

Furthermore, the distance between the opening of the pulp supply pipe (2) and the impeller (1) on the uppermost layer is 0.5-1 m.

Further, the impeller (1) is of a structure with a closed center, and the blades are uniformly arranged around the closed center.

Further, the lower edge of each blade of the impeller (1) is of a grid-shaped structure.

The utility model provides a pair of do not have high-efficient desulphurization unit that sprays, gas-liquid mass transfer rate is high, and the running resistance is little, simple structure, the installation and the maintenance of being convenient for, difficult jam, the reliability is high. The cost is low, the operating cost is low, and the desulfurizing device has high cost performance.

Drawings

FIG. 1 is a diagram: the structure of the utility model is shown schematically,

FIG. 2 is a diagram of: the structure schematic diagram of the flue gas accelerator (4) of the utility model,

FIG. 3 is a diagram of: the structure schematic diagram of the impeller (1) of the utility model,

FIG. 4 is a diagram of: the utility model discloses desulfurization effect picture.

Detailed Description

The following detailed description of the embodiments of the present non-spraying high-efficiency desulfurization device is provided in conjunction with the accompanying drawings, which are provided for illustration only and are not intended to limit the scope of the present invention, and various modifications of equivalent forms of the present invention which are made by those skilled in the art fall within the scope of the present invention defined by the appended claims.

The utility model provides a do not have high-efficient desulphurization unit that sprays installs in middle and small boiler, steelmaking, the smoke emission department of mill in the aspect of aluminium smelting, boats and ships etc. and other chemical industry and the non-electricity, perhaps replaces the desulfurization unit of desulfurization dust removal integrated device. It is mainly used for desulfurization, and the flue gas at the outlet needs dust removal treatment. The device forms small liquid drops by means of the reducing part and the impeller part of the flue gas accelerator (4) to prevent the small liquid drops from forming a liquid holding layer, and desulfurization is realized by full contact of the liquid drops and the flue gas.

As shown in figure 1, the utility model provides a spray-free high-efficiency desulphurization device, which comprises an impeller (1), a slurry supply pipe (2), an outer cylinder (3) and a flue gas accelerator (4); the impeller (1) is aligned with the axis of the flue gas accelerator (4) and is tightly attached to the flue gas accelerator; the layer of impeller (1) and the flue gas accelerator (4) form a small desulfurization unit, and the number of the desulfurization units can be flexibly determined according to the requirement of desulfurization efficiency; the flue gas accelerator (4) is a special venturi, a reducing part is arranged in the middle of the venturi, a circle of grid bars with the length of about 10cm are densely and uniformly distributed at the reducing part against the airflow direction, the width of each grid bar is about 5mm, the gap between the grid bars is about 10mm, and the diameter of a circular band formed by the lower ends of the circle of grid bars is smaller than that of the reducing part of the venturi, see figure 2; the grid bars arranged on the flue gas accelerator (4) are made of wear-resistant and corrosion-resistant tough materials, preferably stainless steel or PPR plastic, and can be welded at the reducing port of the Venturi.

One end of the pulp supply pipe (2) is arranged on the outer cylinder (3) and is used for being connected with an external pulp device to convey pulp, and no nozzle is arranged on the pulp supply pipe. After entering the outer barrel (3), the other end of the outer barrel is vertically inserted along the center of the outer barrel, and the distance between the pipe orifice of the pulp supply pipe (2) and the impeller (1) on the uppermost layer is 0.5-1 m, as shown in figure 1.

The impeller (1) is of a structure with a closed center, and the blades are uniformly distributed around the closed center. The lower edge of each blade of the impeller (1) is of a grid-shaped structure, and is shown in figure 3.

Specifically, unprocessed former flue gas is followed the utility model discloses a do not have and spray high-efficient desulphurization unit bottom and get into, the flue gas is by lower supreme when first layer impeller (1), and the air current is rotatory, then gets into flue gas accelerator (4), and at flue gas accelerator (4), the flue gas is because the passageway internal diameter diminishes and accelerates.

On the other hand, the slurry enters the device from the upper slurry supply pipe (2), flows downwards due to the action of gravity, on the impeller (1), due to the fact that the center of the impeller (1) is closed, the slurry is scattered and distributed on each blade of the impeller (1) after falling to the center of the impeller, and due to the grid-shaped structure of the edge of each blade, the slurry is scattered to form small droplets. Due to the rotating air flow and the acceleration of the air flow, the formed small liquid drops are carried upwards by the air flow on one hand and are thrown to the cylinder wall due to centrifugal force on the other hand. In the downward wall flow process of slurry, the slurry can pass through the flue gas accelerator (4) and flow to the reducing part of the flue gas accelerator (4), because the grid bars downwards along the reducing inclined plane are arranged at the reducing position, part of the slurry can downwards drop through the grid bar gaps, part of the slurry can be adhered to the grid bars to move downwards for a short distance, the two parts of the slurry can be carried by the airflow again under the shearing action of the rotating accelerating airflow at the reducing part and rotate upwards, and in the rotating turbulence of the airflow and the liquid drops, SO2 in the original flue gas is fully contacted with the desulfurization slurry, SO that the purpose of high-efficiency desulfurization is realized.

Examples

Na can be used as absorbent in the slurry used in the device₂CO₃、NaOH、Ca(OH)₂Conventional alkaline absorbents, one performance aspect of the device is set forth below:

as shown in figure 4, when sodium carbonate is used as a desulfurization absorbent and the resistance is maintained at about 1.5KPa, the fixed slurry supply amount is unchanged, the flue gas amount is gradually increased, so that the liquid-gas ratio is gradually reduced, and the liquid-gas ratio is reduced in the increasing process of the flue gas amount, so that the desulfurization efficiency is gradually reduced when the flue gas amount is lower than 2500m3/h, but when the flue gas amount exceeds 2500m3/h, the gas-liquid mass transfer rate is greatly improved, so that the corresponding desulfurization efficiency is increased on the contrary, and the device enters the optimal operation condition, namely low liquid-gas ratio, low resistance and high desulfurization efficiency. As can be seen from the attached figure 4, the desulfurization efficiency can reach more than 98.5 percent at most when the device is used.

To sum up, the utility model provides a high-efficient desulfurization device that sprays that does not have, its desulfurization is efficient, and the running resistance is little, simple structure, and the reliability is high, easily installation and maintenance. The novel desulfurizing device is very suitable for small boilers, steel making, aluminum smelting, ships and other chemical and non-electric factories. The device need not the thick liquid nozzle, the special construction of impeller (1) and flue gas accelerator (4) and because of the rotatory air current of accelerating that this structure formed for the thick liquid is broken up into a large amount of liquid drops, reaches very high gas-liquid mass transfer rate, also avoids the condition that traditional wet process absorption tower nozzle blockked up, simultaneously, can be according to the size of flue gas volumn, its device quantity of nimble arrangement and mode of arranging can be according to the environment in actual place, because of the simplest and most convenient construction scheme of adoption of local system.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

Claims

1. The utility model provides a do not have high-efficient desulphurization unit that sprays which characterized in that: the device comprises an outer barrel (3), a slurry supply pipe (2) arranged in the outer barrel (3) and m desulfurization units, wherein m is more than or equal to 1; the desulfurization unit comprises an impeller (1) and a flue gas accelerator (4), wherein n grid bars are densely and uniformly distributed on the diameter-reducing part of the flue gas accelerator (4), and n is more than or equal to 1.

2. The spray-free high-efficiency desulfurization device according to claim 1, characterized in that: the impeller (1) is aligned with the axis of the flue gas accelerator (4) and is tightly attached to the flue gas accelerator.

3. The spray-free high-efficiency desulfurization device according to claim 1, characterized in that: the flue gas accelerator (4) is a Venturi, n grid bars are densely and uniformly distributed at the reducing part of the Venturi, and n is more than or equal to 1.

4. The spray-free high-efficiency desulfurization device according to claim 1 or 3, characterized in that: the grid bars are 10cm-20cm long, about 5-10mm wide and 6-10mm in gap.

5. The spray-free high-efficiency desulfurization device according to claim 1 or 3, characterized in that: the grid bars arranged on the flue gas accelerator (4) are made of wear-resistant and corrosion-resistant tough materials.

6. The spray-free high-efficiency desulfurization device according to claim 5, characterized in that: the grid bars arranged on the flue gas accelerator (4) are made of stainless steel or PPR plastic.

7. The spray-free high-efficiency desulfurization device according to claim 1, characterized in that the slurry supply pipe (2) is vertically downward along the center of the outer cylinder (3).

8. The spray-free high-efficiency desulfurization device according to claim 1, characterized in that the distance between the opening of the slurry supply pipe (2) and the uppermost impeller (1) is 0.5-1 m.

9. The spray-free high-efficiency desulfurization device according to claim 1, wherein the impeller (1) has a structure in which the center is closed and the blades are uniformly arranged around the center closed region.

10. The spray-free high-efficiency desulfurization device according to claim 1, characterized in that: the lower edge of each blade of the impeller (1) is of a grid-shaped structure.