CN204320067U - A kind of circulation desulfurization denitration absorption tower - Google Patents

Abstract

The utility model discloses a circulation desulfurization and denitrification absorption tower, which comprises a tower body, a smoke outlet is arranged at the top, and a smoke inlet is arranged at the bottom; The other end is connected to the pool, and the other end is provided with a nozzle, and the nozzle extends into the upper part of the tower body; a circulating pump is installed on the circulating spray pipe; a flue gas deflector is arranged under the nozzle in the tower body; The air deflector includes a conical cylinder, which is placed upside down in the tower body and connected to the tower wall through a connecting plate; several devices are installed on the conical cylinder and the side wall of the tower body adjacent to the conical cylinder to make the smoke The guide vanes that rise in air spiral; the nozzle is arranged on the axis of the tower body, including a vertical main pipe and several horizontally arranged branch pipes; a number of spray holes are opened in the branch pipe along the axial direction; the nozzle can be wound around it Axis rotation.

Description

A circulating desulfurization and denitrification absorption tower

technical field

The utility model relates to a desulfurization and denitrification absorption tower, in particular to an absorption tower capable of fully mixing and reacting flue gas and spray liquid.

Background technique

With the continuous development of economic globalization, environmental protection issues are increasingly concerned, especially in the fields of coal or oil-fueled boilers or thermal power generation and iron and steel smelting, the large amount of flue gas emitted during the production process must be effectively treated Treatment to minimize the emission of harmful substances such as SOx, NOx, HCl and HF entrained in the flue gas, reduce the generation of acid rain, and protect the environment.

The existing absorption tower mainly includes a tower body with an air inlet and a discharge port. The middle and upper parts of the tower body are arranged side by side with multi-layer spray pipes. Several nozzles are evenly distributed on the spray pipes, and the spray pipes The pipe is connected with the lower part of the tower body through the slurry circulating pump to realize the circulating spraying of the slurry. The dust removal flue gas enters the tower body through the air inlet and then flows countercurrently to the discharge port above the tower body. The slurry sprayed below undergoes a chemical reaction to further purify harmful substances such as SOx, NOx, HCl and HF in the flue gas. However, after the flue gas enters the purification tower, it is easy to generate turbulent flow, resulting in insufficient chemical reaction with the slurry. .

Utility model content

In view of the above technical problems, the utility model provides a circulating desulfurization and denitrification absorption tower, which can fully react the flue gas with the spray liquid and improve the absorption efficiency.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a circulating desulfurization and denitrification absorption tower, including a tower body, the top of which is provided with a smoke outlet, and the bottom is provided with a smoke inlet; it also includes a circulating spray pipe , one end of which is connected to the liquid storage tank at the bottom of the tower body, and the other end is provided with a nozzle, and the nozzle extends into the upper part of the tower body; a circulating pump is installed on the circulating spray pipe; There is a flue gas deflector; the flue gas deflector includes a conical cylinder, which is placed upside down in the tower body and connected to the tower wall through a connecting plate; the conical cylinder and the adjacent conical cylinder A number of guide vanes are installed on the side wall of the tower body to make the flue gas spiral upward; the nozzle is arranged on the axis of the tower body, including a vertical main pipe and several horizontally arranged branch pipes; A spray hole; the spray head can rotate around its axis.

As an improvement, the branch pipe extends to the side wall of the tower body, and the diameter of the spray hole on the branch pipe increases from the root to the end. After the flue gas passes through the flue gas deflector, it spirals up along the side wall of the tower body. Extend the branch pipe to the side wall of the tower body, and increase the diameter of the spray hole of the branch pipe, so that the maximum flow of the spray liquid is just at the position where the flue gas rises, so that the flue gas and the spray liquid can more fully contact.

As an improvement, a slow flow plate is provided in the tower below the flue gas deflector; the slow flow plate includes a radially arranged baffle plate, and a number of holes for the flue gas to pass through are opened on the baffle plate. The slow flow plate can block the smoke first, so that the rising speed of the smoke slows down. Secondly, the flue gas can also react with the spray liquid attached to the slow flow plate to reduce the concentration of harmful substances in the flue gas.

As an improvement, a conical water distribution plate with a small top and a large bottom is installed above the conical cylinder, and the diameter of its large end is equal to the diameter of the large end of the conical cylinder. The water distribution plate can close the top of the cone to prevent the spray liquid from entering the cone and accumulating. Secondly, the spray liquid can be evenly distributed to the blades of the conical cylinder, so that the smoke can also react with the spray liquid evenly during the rising process.

The advantages of the utility model are as follows: 1. The absorption tower with the above-mentioned structure forms a swirling flow in the opposite direction between the ascending flue gas and the descending spray liquid, so that the contact time between the two is greatly increased. 2. The spiraling flue gas breaks the spray droplets into mist, which improves the reaction effect. 3. A large amount of spray liquid can be attached to the leaves, which increases the contact area between the smoke and the spray liquid.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Fig. 2 is a schematic diagram of the nozzle structure in the utility model.

Marks in the figure: 1 tower body, 2 smoke inlet, 3 smoke outlet, 4 circulating spray pipe, 5 nozzle, 6 circulating pump, 7 conical barrel, 8 guide vane, 9 slow flow plate, 10 water distribution plate, 11 main pipe, 12 branch pipes, 13 spray holes, 14 liquid storage tank, 15 connecting plate.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1 and Figure 2:

The utility model includes a tower body 1, the top of which is provided with a smoke outlet 3, and the bottom is provided with a smoke inlet 2; it also includes a circulating spray pipe 4, one end of which is connected to the liquid storage pool 14 at the bottom of the tower body 1, and the other One end is provided with a nozzle 5, and the nozzle 5 extends into the upper part of the tower body 1; a circulating pump 6 is installed on the circulating spray pipe 5; The flue gas deflector includes a conical cylinder 7, the conical cylinder 7 is placed upside down in the tower body and connected to the tower wall through the connecting plate 15; the conical cylinder 7 and the tower adjacent to the conical cylinder 7 A number of guide vanes 8 are installed on the side wall of the body 1 to make the flue gas spiral up, and the guide vanes 8 can be continuous or discontinuous spiral; the nozzle 5 is arranged on the axis of the tower body, including a vertical main pipe 11 and several horizontally arranged branch pipes 12; the branch pipe 12 has a number of spray holes 13 in the axial direction; the branch pipe 12 extends to the side wall of the tower body 1, and the diameter of the spray hole 13 on the branch pipe 12 is from the root to the end increment. The spray head 5 can rotate around its axis. A slow flow plate 9 is arranged in the tower body 1 below the flue gas deflector; the slow flow plate 9 includes a radially arranged baffle, and a number of holes for the flue gas to pass through are opened on the baffle. The top of the conical cylinder 7 is equipped with conical 10 water distributing plates with a small top and a large bottom, and the diameter of its large end is equal to the diameter of the large end of the conical cylinder 7 .

When working, the circulation pump 6 transports the spray liquid in the liquid storage tank 14 to the spray head 5 through the circulation spray pipe 4, and the rotation direction of the spray head 5 is set to be opposite to the rotation direction of the flue gas. The flue gas enters the tower body 1 from the smoke inlet 2, passes through the slow flow plate 9, reduces the rising speed, and spirals up under the action of the conical cylinder 7 and the guide vanes 8 on the side wall of the tower body 1. After the flue gas passes through the flue gas deflector, it is hedged against the spirally descending spray liquid, which can not only increase the reaction time between the two, but also break the spray liquid droplets into mist and increase the contact area with the flue gas. The spray liquid can form a uniform liquid film on the guide vane 8, which fully reacts with the rising flue gas.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (4)

1. A circulating desulfurization and denitrification absorption tower, comprising a tower body, the top of which is provided with a smoke outlet, and the bottom is provided with a smoke inlet; also includes a circulating spray pipe, one end of which is connected with the liquid storage tank at the bottom of the tower body, The other end is provided with a nozzle, and the nozzle extends into the upper part of the tower body; a circulating pump is installed on the circulating spray pipe; it is characterized in that: a flue gas deflector is arranged under the nozzle in the tower body; The flue gas deflector includes a conical cylinder, which is placed upside down in the tower body and connected to the tower wall through a connecting plate; several devices are installed on the conical cylinder and the side wall of the tower body adjacent to the conical cylinder so that The guide vanes for the spiral rising of flue gas; the nozzle is arranged on the axis of the tower body, including a vertical main pipe and several horizontally arranged branch pipes; a number of spray holes are opened in the branch pipe along the axial direction; the nozzle can be wound around Its axis rotates. 2. A circulating desulfurization and denitrification absorption tower according to claim 1, characterized in that: the branch pipe extends to the side wall of the tower body, and the diameter of the spray hole on the branch pipe increases from the root to the end. 3. A circulating desulfurization and denitrification absorption tower according to claim 1, characterized in that: a slow flow plate is arranged below the flue gas deflector in the tower body; the slow flow plate includes a radially arranged baffle There are a number of holes on the baffle for the passage of smoke. 4. A circulating desulfurization and denitrification absorption tower according to claim 1, characterized in that: a conical water distribution plate with a small top and a large bottom is installed above the conical cylinder, and the diameter of the large end is the same as that of the large end of the conical cylinder. equal in diameter.