CN213375900U

CN213375900U - Cooling, dedusting and desulfurizing system

Info

Publication number: CN213375900U
Application number: CN202022118333.8U
Authority: CN
Inventors: 丁眉忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-06-08
Anticipated expiration: 2030-09-24

Abstract

The utility model relates to a flue gas desulfurization technical field, more specifically say, relate to a cooling dust removal desulfurization system, raise alkaline absorption liquid in with the alkali water pool through the impeller, and the splash that raises disperses, collides in the desulfurization case, mixes with the flue gas of flowing through, accomplishes desulfurization, dust removal and cooling, and the flue gas is inhaled to the chimney bottom through the draught fan negative pressure after the purification, at the flue gas in-process that rises, and the alkaline absorption liquid drop that smugglies secretly falls to the alkali water pool through its self action of gravity in the flue gas. The smoke reacts with the alkaline absorption liquid to generate tar which is deposited into an alkaline water pool, and secondary sale can be realized after regular cleaning. The cooling, dedusting and desulfurizing system has simple structure and obvious desulfurizing effect.

Description

Cooling, dedusting and desulfurizing system

Technical Field

The utility model relates to a flue gas desulfurization technical field, more specifically say, relate to a cooling dust removal desulfurization system.

Background

Sulfur dioxide pollution becomes an important factor for restricting the sustainable development of economy and society in China, so that the control of the sulfur dioxide pollution is imperative. At present, three desulfurization modes of desulfurization before combustion, desulfurization during combustion and desulfurization after combustion can be adopted according to different positions of the desulfurization process in production. Among them, flue gas desulfurization after combustion is the main means adopted in the world to control sulfur dioxide gas pollution at present. The desulfurization techniques are various, and can be roughly classified into dry methods, semi-dry methods and wet methods according to the reaction state of the desulfurization process, wherein the wet desulfurization technique is most widely applied due to high desulfurization efficiency and simple operation.

The wet desulfurizing process includes setting alkaline absorption liquid, which is sodium hydroxide or calcium hydroxide solution, inside the absorption tank, connecting gas inlet pipe, gas outlet pipe and spraying unit to the absorption tank, spraying the alkaline absorption liquid continuously to mix with the fume in the absorption tank, reacting the sulfur dioxide in the fume with the alkaline absorption liquid, and exhausting the reacted fume via the gas outlet pipe to avoid the exhaust of sulfur dioxide. The method has high requirements on the device, high manufacturing cost and difficult maintenance.

SUMMERY OF THE UTILITY MODEL

In order to overcome exist not enough among the prior art, the utility model provides a cooling dust removal desulfurization system is through regarding the impeller as spray set, raises the alkaline absorption liquid to desulfurization case and flue gas mix and accomplish the desulfurization.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a cooling, dedusting and desulfurizing system comprises an alkaline water tank and a flushing device, wherein alkaline absorption liquid is contained in the alkaline water tank; a desulfurization box is arranged above the alkaline water pool and communicated with the alkaline water pool; the washing device adopts an impeller, the upper end part of the impeller is arranged in the desulfurization box, and the lower end part of the impeller is arranged in an alkaline water pool and is immersed in the alkaline absorption liquid; a first pipeline and a second pipeline are respectively arranged on the opposite side end faces of the desulfurization box, the first pipeline and the second pipeline are respectively communicated with the desulfurization box, the other end of the first pipeline is communicated with a flue gas outlet, the outlet of the second pipeline is connected with an induced draft fan, the outlet of the induced draft fan is communicated with the bottom of a chimney, and the chimney is arranged above the alkali water pool and is communicated with the alkali water pool; and the wind speed of the induced draft fan is greater than the rotation linear speed of the impeller.

Further, the connecting line direction of the first pipeline and the second pipeline is the same as the tangential direction of the highest point of rotation of the impeller.

Further, the chimney height is 15 m.

Further, the rotating shaft of the impeller is above the liquid level of the alkaline absorption liquid.

Further, the end part, far away from the rotation center, of the fan blade of the impeller is arranged to be arc-shaped.

Furthermore, a plurality of holes are formed in the fan blades of the impeller.

Further, the highest point of the impeller is lower than the center line of the first pipeline and higher than the bottom of the first pipeline.

Further, the alkaline absorption liquid adopts sodium hydroxide or calcium hydroxide solution.

Compared with the prior art, the utility model discloses the beneficial effect who has does:

the utility model provides a cooling dust removal desulfurization system raises alkaline absorption liquid in with the alkali water pond through the impeller, and the splash that raises disperses in the desulfurization case, the collision, and the flue gas that flows through mixes, accomplishes the desulfurization, removes dust and cooling, and the water mist of purification back flue gas for smuggleing secretly having alkaline absorption liquid inhales to the chimney bottom through the draught fan negative pressure, and at the ascending in-process of flue gas, the alkaline absorption liquid drop smugglied secretly falls to the alkali water pond through its self action of gravity in the flue gas. The smoke reacts with the alkaline absorption liquid to generate tar which is deposited into an alkaline water pool, and secondary sale can be realized after regular cleaning. The cooling, dedusting and desulfurizing system has simple structure and obvious desulfurizing effect.

Drawings

FIG. 1 is a top view of a cooling, dedusting and desulfurizing system provided by the present invention;

FIG. 2 is a front view of a cooling, dedusting and desulfurizing system provided by the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a side view of a cooling, dedusting and desulfurizing system provided by the present invention;

fig. 5 is a schematic view of a structure of the impeller.

In the figure: 1. an alkaline water tank; 2. a flushing device; 3. an alkaline absorption liquid; 4. a desulfurization box; 5. a first conduit; 6. a second conduit; 7. a chimney; 8. an induced draft fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-4, a cooling, dedusting and desulfurizing system comprises an alkaline water tank 1 and a washing device 2, wherein an alkaline absorption liquid 3 is contained in the alkaline water tank 1; a desulfurization box 4 is arranged above the alkaline water pool 1, and the desulfurization box 4 is communicated with the alkaline water pool 1; the washing device 2 adopts an impeller, the upper end part of the impeller is arranged in the desulfurization box 4, and the lower end part of the impeller is arranged in the alkaline water pool 1 and is immersed in the alkaline absorption liquid 3; a first pipeline 5 and a second pipeline 6 are respectively arranged on the end face of the opposite side of the desulfurization box 4, the first pipeline 5 and the second pipeline 6 are respectively communicated with the desulfurization box 4, the other end of the first pipeline 5 is communicated with a flue gas outlet, the outlet of the second pipeline 6 is connected with an induced draft fan 8, the outlet of the induced draft fan 8 is communicated with the bottom of a chimney 7, and the chimney 7 is arranged above the alkaline water pool 1 and is communicated with the alkaline water pool 1; and the wind speed of the induced draft fan 8 is greater than the rotation linear speed of the impeller. The rotating shaft of the impeller is above the liquid level of the alkaline absorption liquid 3. The alkaline absorption liquid 3 adopts sodium hydroxide or calcium hydroxide solution.

In this embodiment, the connection line direction of the first pipe 5 and the second pipe 6 is the same as the tangential direction of the highest point of rotation of the impeller.

In the present embodiment, the chimney 7 has a height of 15 m. The discharged clean flue gas is ensured not to carry alkaline absorption liquid, and the consumption speed of the alkaline absorption liquid is reduced.

In the embodiment, only water and alkali need to be added in the system operation process, and the water and the alkali are not discharged; the impeller provides power through the transmission of the motor and raises water bloom. The system can meet the environmental protection requirement of boilers and ash kilns, and can normally operate without stopping at high temperature.

As shown in fig. 5, the end of the blade of the impeller away from the rotation center is arc-shaped; the water pumping quantity is increased through the arc. A plurality of holes are formed in the fan blades of the impeller; the impact of raising spray is increased through the holes, and the desulfurization efficiency is improved. The highest point of the impeller is lower than the central line of the first pipeline 5 and higher than the bottom of the first pipeline 5; so that most of the flue gas is directly discharged after being desulfurized in the desulfurization box 4, and a small part of the flue gas enters the lower part of the desulfurization box 4 along with the impeller to be desulfurized, thereby improving the desulfurization efficiency.

The above description has been made in detail only for the preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art, and all such changes are intended to be encompassed by the present invention.

Claims

1. The utility model provides a cooling dust removal desulfurization system which characterized in that: the device comprises an alkaline water tank (1) and a flushing device (2), wherein alkaline absorption liquid (3) is contained in the alkaline water tank (1); a desulfurization box (4) is arranged above the alkaline water pool (1), and the desulfurization box (4) is communicated with the alkaline water pool (1); the washing device (2) adopts an impeller, the upper end part of the impeller is arranged in the desulfurization box (4), and the lower end part of the impeller is arranged in the alkaline water pool (1) and is immersed in the alkaline absorption liquid (3); a first pipeline (5) and a second pipeline (6) are respectively arranged on the end face of the opposite side of the desulfurization box (4), the first pipeline (5) and the second pipeline (6) are respectively communicated with the desulfurization box (4), the other end of the first pipeline (5) is communicated with a flue gas outlet, the outlet of the second pipeline (6) is connected with an induced draft fan (8), the outlet of the induced draft fan (8) is communicated with the bottom of a chimney (7), and the chimney (7) is arranged above the alkaline water pool (1) and is communicated with the alkaline water pool (1); and the wind speed of the induced draft fan (8) is greater than the rotation linear speed of the impeller.

2. The system for cooling, dedusting and desulfurizing according to claim 1, characterized in that: the connecting line direction of the first pipeline (5) and the second pipeline (6) is the same as the tangent direction of the highest point of rotation of the impeller.

3. The system for cooling, dedusting and desulfurizing according to claim 1, characterized in that: the height of the chimney (7) is 15 m.

4. The system for cooling, dedusting and desulfurizing according to claim 1, characterized in that: the rotating shaft of the impeller is above the liquid level of the alkaline absorption liquid (3).

5. The system for cooling, dedusting and desulfurizing according to claim 1 or 4, wherein: the end part of the fan blade of the impeller, which is far away from the rotating center, is arc-shaped.

6. The system of claim 5, wherein the cooling, dedusting and desulfurizing system comprises: and a plurality of holes are formed in the fan blades of the impeller.

7. The system for cooling, dedusting and desulfurizing according to claim 1, characterized in that: the highest point of the impeller is lower than the center line of the first pipeline (5) and higher than the bottom of the first pipeline (5).

8. The system for cooling, dedusting and desulfurizing according to claim 1, characterized in that: the alkaline absorption liquid (3) adopts sodium hydroxide or calcium hydroxide solution.