Flue gas cooling device for industrial denitration

Abstract

The utility model relates to the technical field of denitration, in particular to a smoke cooling device for industrial denitration, which comprises a cooling box, a water tank and a water pump for providing power, the upper end and the lower end of the cooling box are respectively connected with an air outlet pipe and an air inlet pipe, the water tank is connected with the bottom of the cooling box through a water inlet pipe, and the water pump is connected with the top of the cooling box through a circulating pipe. An outer flow dividing pipe and an inner flow dividing pipe which are connected with the air inlet pipe are arranged in the cooling box, and the outer flow dividing pipe and the inner flow dividing pipe are both spiral. And the circulating pipe is S-shaped and is provided with air for cooling the circulating pipe. The utility model has the advantages that: firstly, the spiral shunting pipe is simple to manufacture and low in production cost; 2, the external circulating pipe is snake-shaped and is provided with a fan, so that the cooling of cooling water is enhanced, and the high temperature of the cooling water in the water tank is avoided; and the inner and outer shunting pipes are staggered up and down, so that the contact area with cooling water is increased, and the cooling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of denitrification, in particular to a flue gas cooling device for industrial denitrification. Background Technique

[0002] Denitrification refers to the process of removing nitrogen oxides from combustion flue gas. Denitrification is divided into pre-combustion denitrification, in-combustion denitrification, and post-combustion denitrification. The relatively mainstream processes in the world are SCR and SNCR. Since most nitrogen oxides are soluble in water, a spray column is provided in the denitrification process to fully mix the flue gas with water so that the nitrogen oxides are dissolved in water, thereby removing the nitrogen oxides from the flue gas. Before denitrification, it is first necessary to cool the high-temperature flue gas discharged from the boiler. However, the existing flue gas cooling devices have problems such as poor cooling efficiency and unsatisfactory cooling effect.

[0003] For example, a flue gas cooling device for industrial denitrification with the patent document number CN211822468U includes a cooling pipe, an inlet pipe, a shunt pipe, an outlet pipe, a circulation pipe, a water pump, a delivery pipe, a water tank, an inlet pipe, and a cover plate. The bottom of the cooling pipe is embedded and welded with the inlet pipe, the top of the cooling pipe is embedded and welded with the outlet pipe, the top of the inlet pipe and the bottom of the outlet pipe are respectively embedded and welded in two cover plates, a shunt pipe is seamlessly welded between the cover plates, and the top of the cooling pipe is embedded and welded with the circulation pipe. In the utility model, the shunt pipe is in a pentagram shape, which can greatly increase the contact area between the shunt pipe and cold water, thereby greatly increasing the efficiency of cold water absorbing the heat of the shunt pipe, so that the flue gas is fully cooled in the shunt pipe. And the shunt pipe is in a pentagram shape, so that the shunt pipe is located in the exact middle of the cooling pipe, so that the cold water volume on each surface of the shunt pipe is kept consistent, having the advantages of fast cooling efficiency and high cooling efficiency.

[0004] However, this structure has the following defects: First, the internal pentagram-shaped heat dissipation pipeline is complex to manufacture, increasing the difficulty of production and manufacturing and raising the production cost; second, there is no heat dissipation device for the external cooling water. When the temperature of the cooling water in the water tank is too high, it cannot cool the flue gas in a timely and effective manner. Content of the Utility Model

[0005] The purpose of the utility model is to provide a flue gas cooling device for industrial denitrification to solve the problems existing in the above background technique.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A flue gas cooling device for industrial denitrification, comprising a cooling box 2, a water tank 9 and a water pump 10 providing power. The upper and lower ends of the cooling box 2 are respectively connected to an air outlet pipe 6 and an air inlet pipe 1. The water tank 9 is connected to the bottom of the cooling box 2 through a water inlet pipe 3. The water pump 10 is connected to the top of the cooling box 2 through a circulation pipe 7. It is characterized in that: an outer shunt pipe 4 and an inner shunt pipe 5 connected to the air inlet pipe 1 are arranged in the cooling box 2, and both the outer shunt pipe 4 and the inner shunt pipe 5 are spiral; the circulation pipe 7 is "snake-shaped", and a fan 8 for dissipating heat from the circulation pipe 7 is provided.

[0007] Preferably, the inner shunt pipe 5 is arranged inside the outer shunt pipe 4 and both are coaxial with the air inlet pipe 1.

[0008] Preferably, the tops of the inner shunt pipe 5 and the outer shunt pipe 4 are both connected to the air outlet pipe 6, and the air outlet pipe 6 is coaxial with the air inlet pipe 1.

[0009] Preferably, the inner shunt pipe 5 and the outer shunt pipe 4 are vertically staggered.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: First, the spiral shunt pipes are simple to manufacture and have low production costs; second, the external circulation pipe is snake-shaped and is provided with a fan, which strengthens the cooling of the cooling water and avoids the high temperature of the cooling water in the water tank; third, the inner and outer shunt pipes are vertically staggered, increasing the contact area with the cooling water and improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is Figure 1 a top view sectional schematic diagram of the cooling pipe.

[0013] In the figure: 1, air inlet pipe; 2, cooling box; 3, water inlet pipe; 4, outer shunt pipe; 5, inner shunt pipe; 6, air outlet pipe; 7, circulation pipe; 8, fan; 9, water tank; 10, water pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0015] Please refer to Figure 1-2, the present utility model provides a technical solution: a flue gas cooling device for industrial denitrification, which includes a cooling box 2, a water tank 9 and a water pump 10 that provides power. The upper and lower ends of the cooling box 2 are respectively connected to an air outlet pipe 6 and an air inlet pipe 1. The water tank 9 is connected to the bottom of the cooling box 2 through a water inlet pipe 3. The water pump 10 is connected to the top of the cooling box 2 through a circulation pipe 7.

[0016] An outer shunt pipe 4 and an inner shunt pipe 5 connected to the air inlet pipe 1 are provided in the cooling box 2. Both the outer shunt pipe 4 and the inner shunt pipe 5 are spiral-shaped, and the inner shunt pipe 5 and the outer shunt pipe 4 are vertically staggered, increasing the contact area with the cooling water and avoiding the contact of multiple shunt pipes at the same height with the cooling water, thereby improving the cooling efficiency. The inner shunt pipe 5 is arranged inside the outer shunt pipe 4 and both are coaxial with the air inlet pipe 1. The tops of the inner shunt pipe 5 and the outer shunt pipe 4 are both connected to the air outlet pipe 6, and the air outlet pipe 6 is coaxial with the air inlet pipe 1.

[0017] The circulation pipe 7 is "snake-shaped", and a fan 8 for dissipating heat from the circulation pipe 7 is provided, increasing the heat dissipation area of the circulation pipe 7. The fan 8 dissipates heat from the cooling water in the circulation pipe 7 and then the cooling water flows back into the water tank 9.

[0018] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A flue gas cooling device for industrial denitrification, comprising a cooling box (2), a water tank (9) and a water pump (10) providing power. The upper and lower ends of the cooling box (2) are respectively connected with an air outlet pipe (6) and an air inlet pipe (1). The water tank (9) is connected to the bottom of the cooling box (2) through a water inlet pipe (3). The water pump (10) is connected to the top of the cooling box (2) through a circulation pipe (7), and is characterized in that: An external shunt pipe (4) and an internal shunt pipe (5) which are connected to an intake pipe (1) are arranged inside the described cooling box (2), and both the external shunt pipe (4) and the internal shunt pipe (5) are spiral; the described circulation pipe (7) is "snake-shaped", and a fan (8) for dissipating heat from the circulation pipe (7) is provided.

2. The flue gas cooling device for industrial denitrification according to claim 1, characterized in that: The described internal shunt pipe (5) is arranged inside the external shunt pipe (4) and both are coaxial with the intake pipe (1).

3. The flue gas cooling device for industrial denitration according to claim 2, characterized in that: The top ends of the described internal shunt pipe (5) and the external shunt pipe (4) are both connected to an exhaust pipe (6), and the exhaust pipe (6) is coaxial with the intake pipe (1).

4. The flue gas cooling device for industrial denitration according to claim 2, characterized in that: The described internal shunt pipe (5) and the external shunt pipe (4) are staggered up and down.

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