CN210356340U

CN210356340U - Smoke whitening device

Info

Publication number: CN210356340U
Application number: CN201921003102.3U
Authority: CN
Inventors: 李龙; 鞠贵冬; 姚余善; 吴刚
Original assignee: Jiangsu Shuangliang Low Carbon Industrial Technology Research Institute Co ltd
Current assignee: Jiangsu Shuangliang Low Carbon Industrial Technology Research Institute Co ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-04-21
Anticipated expiration: 2029-07-01

Abstract

The utility model discloses a smoke whitening device, which comprises a smoke air mixing device and a high-efficiency demisting device arranged above the smoke air mixing device; the efficient defogging device comprises a defogger and a defogging device shell, wherein the defogger is arranged in the defogging device shell; the flue gas and air mixing device is a circular cylinder, the outer wall of the circular cylinder is a mixing device shell, an internal hollow channel is a flue gas flow channel, the flue gas and air mixing device also comprises an induced draft drain hopper, the bottom and the inside of the induced draft drain hopper are uniformly distributed with a plurality of drain holes and vent holes, the lower part of the outer edge of the induced draft drain hopper is connected with the mixing device shell, and the inner edge of the induced draft drain hopper is connected with the outer wall of the flue gas flow channel; and a smoke contraction opening is formed in the bottom of the smoke and air mixing device. The utility model discloses a siphon principle when optimizing the air intlet resistance, has improved the mixing efficiency of flue gas and air, and the water droplet in the flue gas uses inertial force to separate, has improved separation efficiency.

Description

Smoke whitening device

Technical Field

The utility model belongs to the technical field of flue gas tail gas processing technique and specifically relates to a flue gas takes off white device for the flue gas of boiler chimney discharge port takes off white.

Background

The flue gas generated after the fuel combustion contains H in different degrees₂And O, the humidity of the flue gas generated by the combustion of the natural gas is higher. When the flue gas is discharged from the boiler, the moisture in the flue gas exists in a gaseous state. After the flue gas is discharged into the atmosphere, because the atmospheric environment temperature is lower in winter, the water vapor in the flue gas is condensed into small water drops, so that the phenomenon of white smoke emission generally exists in boiler smoke discharge. With the implementation of a great amount of coal-fired boiler coal gas change projects in the north, black smoke generated by burning coal in the past day is not seen, and rolling white smoke is used instead. The white smoke contains fine solid impurities, which affects the air quality of cities, reduces the visibility of peripheral areas and weakens the satisfaction degree of the public on the environment. Therefore, the tail gas of the flue gas needs to be subjected to whitening treatment, so that the harmful influence of white smoke on the quality of the urban air is avoided.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model aims at providing a white device is taken off to flue gas makes the gaseous state saturated water condensation in the flue gas be the water droplet, then collects the water droplet in the flue gas through the defroster to reach the flue gas and take off white effect.

The utility model provides a technical scheme that above-mentioned problem adopted does: a smoke whitening device comprises a smoke air mixing device and a high-efficiency demisting device arranged above the smoke air mixing device;

the efficient defogging device comprises a defogger and a defogging device shell, wherein the defogger is arranged in the defogging device shell; the flue gas and air mixing device is a circular cylinder, the outer wall of the circular cylinder is a mixing device shell, an internal hollow channel is a flue gas flow channel, the flue gas and air mixing device further comprises an induced draft drain hopper, the induced draft drain hopper is in a hollow hopper shape, a plurality of drain holes and vent holes are uniformly distributed at the bottom and inside of the induced draft drain hopper, the mixing device shell is connected below the outer edge of the induced draft drain hopper, and the inner edge of the induced draft drain hopper is connected with the outer wall of the flue gas flow channel; the bottom of the flue gas and air mixing device is provided with a flue gas contraction opening, and the flue gas contraction opening, the inner wall of the shell of the mixing device and the outer wall of a flue gas flow passage form a water receiving groove; and a water collecting pipe, a primary induced draft pipe and a secondary induced draft pipe are also arranged in the flue gas and air mixing device.

Preferably, the connection part of the flue gas channel and the induced draft drain hopper is provided with an outer edge extending upwards.

Preferably, one end of the water collecting pipe is arranged at the bottom of the water collecting tank of the flue gas and air mixing device, and the other end of the water collecting pipe is downwards inclined to extend out of the shell of the mixing device.

Preferably, one end of the primary induced draft pipe is arranged above the flue gas flow channel, and the other end of the primary induced draft pipe is inclined downwards and extends out of the shell of the mixing device.

Preferably, one end of the secondary induced air pipe is arranged below the side surface of the induced air drain hopper, and the other end of the secondary induced air pipe inclines downwards and extends out of the shell of the mixing device.

Preferably, the demister is made of corrosion-resistant material.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model has the following beneficial effect:

(1) low resistance: the design of the flue gas-air mixing device and the efficient demisting device conforms to the aerodynamic principle, and the resistance of the device is reduced as much as possible, the utility model adopts the ascending power of the chimney, so that the de-whitening of the chimney can be completed, and the energy consumption of the fan is not increased basically;

(2) high efficiency: the flue gas and the air are mixed by adopting a siphon principle, the mixing efficiency of the flue gas and the air is improved while the resistance of an air inlet is optimized, and water drops in the flue gas are separated by using the inertia force, so that the separation efficiency is improved;

(3) the structure is compact: because there is not moving parts, mixing arrangement combines together with the separator organic to reduce the size of device, this the utility model discloses compact structure, installation space requires for a short time.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front sectional view of the present invention.

Fig. 3 is a top view of the present invention.

Fig. 4 is a schematic structural diagram of the flue gas and air mixing device of the present invention.

Fig. 5 is a front sectional view of the flue gas and air mixing device of the present invention.

Fig. 6 is an axial sectional view of the high-efficiency defogging device of the present invention.

Fig. 7 is a top view of the induced draft drain trap of the present invention.

In the figure:

the device comprises a flue gas and air mixing device 1, a high-efficiency demisting device 2, a flue gas contraction opening 3, a water collecting pipe 4, a primary induced air pipe 5, a secondary induced air pipe 6, a flue gas flow passage 7, a mixing device shell 8, an induced air drain hopper 9, a demister 10 and a demisting device shell 11.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Example 1:

referring to fig. 1-7, a flue gas de-whitening device comprises a flue gas and air mixing device 1 and a high-efficiency demisting device 2 arranged above the flue gas and air mixing device 1.

The efficient demisting device 2 comprises a demister 10 and a demisting device shell 11, wherein the demisting device 10 is arranged in the demisting device shell 11, and the demister 10 is made of a corrosion-resistant material and is used for separating water drops from flue gas; a certain gap is arranged between the demister 10 and the demister shell 11, so that water separated from the flue gas flows to the flue gas-air mixing device 1 along the inner wall of the demister shell 11.

The flue gas and air mixing device 1 is a circular cylinder, the outer wall of the circular cylinder is a mixing device shell 8, an internal hollow channel is a flue gas runner 7, the flue gas and air mixing device further comprises an induced draft drain hopper 9, the induced draft drain hopper 9 is in a hollow hopper shape, a plurality of drain holes and vent holes are uniformly distributed at the bottom and inside of the induced draft drain hopper 9, the mixing device shell 8 is connected below the outer edge of the induced draft drain hopper 9, the inner edge is connected with the outer wall of the flue gas runner 7, and an outer edge extending upwards is arranged at the connection part of the flue gas runner 7 and the induced draft drain hopper 9, so that separated water drops can be collected conveniently, and the water drops can be prevented from entering the flue gas runner; the bottom of the flue gas and air mixing device 1 is provided with a flue gas contraction opening 3, and the flue gas contraction opening 3, the inner wall of the mixing device shell 8 and the outer wall of the flue gas flow passage 7 form a water receiving groove.

The flue gas contraction opening 3, the flue gas flow passage 7, the mixing device shell 8 and the induced draft drain hopper 9 are connected together in a welding mode.

Still be equipped with in the flue gas air mixing device 1 and receive water pipe 4, primary induced duct 5 and secondary induced duct 6, the one end setting of receiving water pipe 4 is in the bottom of the receipts water tank of flue gas air mixing device 1, and the mixing arrangement shell 8 is stretched out to the other end downward sloping, the one end setting of primary induced duct 5 is near the outer border of flue gas runner 7, and the mixing arrangement shell 8 is stretched out to the other end downward sloping, the one end setting of secondary induced duct 6 is in the side below of induced draft drain hopper 9, and the mixing arrangement shell 8 is stretched out to the other end downward sloping.

The water collecting pipes 4, the primary induced draft pipes 5 and the secondary induced draft pipes 6 are the same in number and different in pipe diameter, and are approximately vertically arranged with the drainage flow direction of the demister 10.

The working principle is as follows:

the smoke contraction port, the smoke flow channel, the mixing device shell and the induced draft drain hopper are connected together in a welding mode. The upper edge of the flue gas flow channel is higher than the connection point of the flue gas flow channel and the induced draft drain hopper, so that water drops separated from the high-efficiency demisting device can be collected, and the water drops are prevented from entering the flue gas flow channel. The water droplet that gets off by high-efficient defogging device separation, the liquid through the defroster collects the runner, and the clearance through defroster and defogging device shell is down flow, along defogging device shell inner wall, flows to the hydrophobic fill of induced air, and the wash port of the hydrophobic fill of rethread induced air gets into the flue gas shrinkage orifice and the mixing arrangement shell and connects the receipts water tank that forms, discharges in order through receiving the water pipe at last.

The induced draft drain hopper is used for the needs of draining, and the air introduced by the secondary induced draft pipe is uniformly distributed, and except for the small holes arranged near the bottom of the induced draft drain hopper, the whole plate surface is provided with water draining and ventilating small holes. The water collecting pipe is positioned at the bottom of the water collecting tank of the flue gas and air mixing device and is mainly used for orderly discharging water. The primary induced draft pipe is longer and directly extends to the position near the outlet of the flue gas flow passage. The secondary induced air pipe is shorter, and the outlet is positioned below the induced air drain hopper.

The demister is made of corrosion-resistant materials and is used for separating water drops in the flue gas. There is certain clearance demister and defogging device shell to the water that makes the separation in the flue gas along defogging device shell inner wall, in the water collecting tank is finally catched to the induced air drain hopper.

The arrangement and the caliber of the water collecting pipe, the primary induced draft pipe and the secondary induced draft pipe are influenced by the temperature, the flow, the moderate degree and the ambient environment parameters of the flue gas.

In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a flue gas takes off white device which characterized in that: the device comprises a flue gas-air mixing device (1) and an efficient demisting device (2) arranged above the flue gas-air mixing device (1);

the efficient defogging device (2) comprises a defogger (10) and a defogging device shell (11), wherein the defogger (10) is arranged in the defogging device shell (11); the flue gas and air mixing device (1) is a circular cylinder, the outer wall of the circular cylinder is a mixing device shell (8), an internal hollow channel is a flue gas runner (7), the flue gas and air mixing device further comprises an induced air drain hopper (9), the induced air drain hopper (9) is in a hollow hopper shape, a plurality of drain holes and vent holes are uniformly distributed at the bottom and inside of the induced air drain hopper, the mixing device shell (8) is connected below the outer edge of the induced air drain hopper (9), and the inner edge of the induced air drain hopper is connected with the outer wall of the flue gas runner (7); the bottom of the flue gas and air mixing device (1) is provided with a flue gas contraction opening (3), and the flue gas contraction opening (3), the inner wall of the mixing device shell (8) and the outer wall of the flue gas flow passage (7) form a water receiving groove; and a water collecting pipe (4), a primary induced draft pipe (5) and a secondary induced draft pipe (6) are further arranged in the flue gas and air mixing device (1).

2. The flue gas whitening apparatus according to claim 1, characterized in that: and an outer edge extending upwards is arranged at the joint of the flue gas channel (7) and the induced draft drain hopper (9).

3. The flue gas whitening apparatus according to claim 1, characterized in that: one end of the water collecting pipe (4) is arranged at the bottom of the water collecting groove of the flue gas and air mixing device (1), and the other end of the water collecting pipe is downwards inclined to extend out of the mixing device shell (8).

4. The flue gas whitening apparatus according to claim 1, characterized in that: one end of the primary induced draft pipe (5) is arranged above the flue gas flow channel (7), and the other end of the primary induced draft pipe is inclined downwards and extends out of the shell (8) of the mixing device.

5. The flue gas whitening apparatus according to claim 1, characterized in that: one end of the secondary induced air pipe (6) is arranged below the side surface of the induced air drain hopper (9), and the other end of the secondary induced air pipe inclines downwards and extends out of the mixing device shell (8).

6. The flue gas whitening apparatus according to claim 1, characterized in that: the demister (10) is made of corrosion-resistant materials.