Dehumidification, demisting and liquid collection integrated device for exhaust gas wet deacidification system

Abstract

The application provides a dehumidification, demisting and liquid collecting integrated device for a waste gas wet deacidification system, which comprises a liquid blocking cap, a wire mesh demister, a liquid collecting disc assembly, a liquid blocking ring plate, a wall plate and a drain pipe, a plurality of liquid collecting disc air inlet channels are arranged side by side above the liquid collecting disc assembly, the liquid blocking cap is arranged on the top of the liquid collecting disc air inlet channel, the wire mesh demister is arranged in the liquid collecting disc air inlet channel, the bottom of the liquid collecting disc air inlet channel is provided with an air inlet, the sidewall is provided with a wire mesh air outlet, the liquid blocking ring plate is arranged above the liquid collecting disc bottom plate assembly, the wall plate is arranged between the liquid blocking ring plate and the liquid collecting disc bottom plate assembly, the outer wall of the wall plate is in abutment with the inner wall of a tower wall, and the outer side of the tower wall is provided with the drain pipe which is in communication with a liquid collecting discharge area. The device saves the occupied space and manufacturing materials of the system equipment, effectively reduces the manufacturing, installation, operation and maintenance costs under the premise of ensuring the process performance.

Description

[0001] The present application relates to the technical field of flue gas wet desulfurization, in particular to a dehumidification, demisting and liquid collection integrated device for a flue gas wet desulfurization system.

[0002] In the existing wet desulfurization system, the lower part of the tower is a cooling absorption part, and the upper part is a dehumidification part. The main function of the cooling absorption part is to remove acidic substances in the flue gas, and the main function of the dehumidification part is to reduce the water content in the flue gas. The cooling circulating water is cooled by a heat exchanger, then flows into the system from the upper part of the dehumidification part, uniformly passes through the filler bed to fully contact with the flue gas, and then returns to the dehumidification water tank through the liquid collection device to form a cycle. In the dehumidification part, the temperature of the flue gas is further reduced, and the water in the flue gas is also precipitated. Finally, the flue gas passes through the demister, and the mist droplets in the flue gas are effectively removed, avoiding the white smoke phenomenon at the outlet of the chimney.

[0003] In the process system, the liquid collection device plays a role in collecting the cooling circulating liquid and maintaining the water balance of the system; the demister plays a role in separating the mist droplets in the flue gas, and both are key equipment for determining the dehumidification and demisting effect of the flue gas. In the traditional wet desulfurization tower, the demister and the collection disc are independently arranged, and the collection disc is usually made of corrosion-resistant metal and welded to the wall of the tower. Such process design has the following problems and defects:

[0004] 1. The wire mesh demister and the collection disc are arranged separately, the height of the tower body is large, and the running resistance is large.

[0005] 2. The water leakage is large, which affects the water balance of the system.

[0006] 3. The collection disc made of 316L stainless steel, 2205 corrosion-resistant metal and the like has high cost and large quality, and is inconvenient for installation and maintenance in the early stage and in the later stage.

[0007] The purpose of the present application is to solve the problems in the prior art, and to provide a dehumidification, demisting and liquid collection integrated device for a flue gas wet desulfurization system, which has high integration degree, reduces the occupied space, and can reduce the installation cost.

[0008] ​​​In order to achieve the above object, the application provides a dehumidification, demisting and liquid collection integrated device for a waste gas wet deacidification system, which comprises a demisting and liquid collection device body installed in a tower body, the demisting and liquid collection device body comprises a liquid blocking cap, a wire mesh demister, a liquid collection tray assembly, a liquid blocking annular plate, a wall plate and a drain pipe, a plurality of liquid collection tray air inlet channels are arranged side by side above the liquid collection tray assembly, the liquid collection tray assembly is connected with the tower wall through a liquid collection tray bottom plate assembly below the liquid collection tray assembly, the liquid blocking cap is installed on the top of the liquid collection tray air inlet channel, the wire mesh demister is installed in the liquid collection tray air inlet channel, the liquid collection tray air inlet channel has an air inlet at the bottom and a wire mesh air outlet at the sidewall, the liquid blocking annular plate is installed inside the tower wall and above the liquid collection tray bottom plate assembly, the wall plate is arranged between the liquid blocking annular plate and the liquid collection tray bottom plate assembly, the outer wall of the wall plate is in abutment with the inner wall of the tower wall, a liquid collection discharge area is formed between the liquid collection tray bottom plate assembly and the wall plate, and the outer side of the tower wall is provided with the drain pipe which is in communication with the liquid collection discharge area.

[0009] Preferably, the liquid blocking cap comprises two symmetrically arranged liquid blocking guide plates which are arranged in a downward inclination, and the lower end of the liquid blocking guide plate is provided with a cooling liquid guide plate which extends vertically upward.

[0010] Preferably, the wire mesh demisters are symmetrically arranged on both sides of the liquid collection tray air inlet channel, and each wire mesh demister is provided with an air inlet guide plate below, the lower wall of the air inlet guide plate is arranged in an inclination, the air inlet guide plates form a wire mesh air inlet guide opening which is in communication with the air inlet between the two air inlet guide plates, and the air inlet guide plate is provided with a supporting plate which is arranged in an inclination of 15° above.

[0011] Preferably, the inner circle of the liquid blocking annular plate is arranged in a downward inclination, and the included angle with the horizontal plane is 15°-30°, the connection between the outer circle of the liquid blocking annular plate and the tower wall is sealed by FRP cladding, and the FRP cladding is double-sided cladding.

[0012] Preferably, the connection is filled with a soil supplement before cladding, and the soil supplement is configured by 901 resin and SiO2 in a mass ratio of 1:10-15.

[0013] Preferably, the lower part of the wall plate is connected with the liquid collection tray bottom plate assembly by hot melting welding, and the upper part of the wall plate is connected with the tower wall by FRP cladding sealing.

[0014] Preferably, the connection between the drain pipe and the inner wall of the tower wall is sealed by FRP cladding, and the connection between the drain pipe and the outer wall of the tower wall is filled with a soil supplement.

[0015] Preferably, the soil supplement is configured by 901 resin and SiO2 in a mass ratio of 1:10-15.

[0016] As preferred, the FRP covering adopts a covering adhesive including a pre-accelerated vinyl ester resin and an accelerator, the pre-accelerated vinyl ester resin: accelerator is 3:1, and the FRP covering adopts a covering carrier of nylon cloth strip.

[0017] As preferred, any one or more of the liquid blocking cap, the liquid collecting disc assembly, the liquid blocking ring plate, the wall plate and the drain pipe adopts a PP material.

[0018] The present application has the following beneficial effects:

[0019] (1) The air inlet structure effectively prevents the upper circulating liquid from leaking out of the air inlet, increases the flow area of the flue gas in the vertical direction, and reduces the operation resistance. In the normal operation condition, the water leakage of the liquid collecting disc is less than or equal to 500 L / h, and the operation resistance is less than or equal to 500 Pa.

[0020] (2) The FRP covering is used to seal the connecting gaps between each structure and the tower body, which significantly improves the tightness, corrosion resistance and temperature resistance of the entire liquid collecting device.

[0021] (3) Ensure that the mist droplets at the system outlet are less than or equal to 75 mg / m 3 The following.

[0022] The features and advantages of the present application will be described in detail with reference to the embodiments combined with the accompanying drawings.

DRAWINGS

[0023] Figure 1 is the internal structure schematic view of the dehumidification, demisting and liquid collecting integrated device for the waste gas wet desulfurization system of the present application;

[0024] Figure 2 is the sectional structure schematic view of the air inlet passage of the liquid collecting disc in the present application;

[0025] Figure 3 is Figure 1 the enlarged structure schematic view of C in the present application;

[0026] Figure 4 is the top view schematic view of the dehumidification, demisting and liquid collecting integrated device for the waste gas wet desulfurization system of the present application.

DETAILED DESCRIPTION

[0027] Reference Figures 1 to 4The application discloses a dehumidifying, demisting and liquid collecting integrated device for a waste gas wet deacidification system.

[0028] Further, the liquid blocking cap 1 comprises two symmetrically arranged liquid blocking flow guide plates 11 which are arranged in a downward inclination mode, and the lower end of the liquid blocking flow guide plate 11 is provided with a cooling liquid flow guide plate 12 which extends vertically upward, so as to prevent a large amount of cooling water from entering the wire mesh demister 2 and leaking out of the liquid collecting disc assembly 4.

[0029] Further, the wire mesh demisters 2 are symmetrically arranged at the two sides of the liquid collecting disc air inlet channel 41, and the lower end of each wire mesh demister 2 is respectively provided with an air inlet guide plate 3, the lower wall of the air inlet guide plate 3 is arranged in an inclination mode, the two air inlet guide plates 3 form a wire mesh air inlet flow guide opening 30 which is communicated with the air inlet opening 411, the upper end of the air inlet guide plate 3 is provided with a supporting plate 31 which is arranged in an inclination mode of 15 degrees, the supporting plate 31 is arranged below the wire mesh demister 2, and the supporting plate 31 prevents the cooling liquid from leaking out of the air inlet opening. In the embodiment, the wire mesh demister 2 is made of a mesh-shaped PP material and has a thickness of not less than 200 mm.

[0030] Further, the inner ring of the liquid blocking ring plate 5 is arranged in a downward inclination mode and has an angle of 15-30 degrees with the horizontal plane, and the thickness of the inner ring is 10 mm; the outer ring of the liquid blocking ring plate 5 is sealed by FRP covering at the connecting position with the tower wall 8, and the FRP covering is double-sided covering; before the covering, the connecting position is filled with a gap by using a soil supplement, and then the FRP covering is used, the soil supplement is configured by using 901 resin and SiO2 in a mass ratio of 1:10-15, and the soil supplement is stirred uniformly and used immediately after being configured.

[0031] Further, referring to Figure 3 the lower part of the wall plate 6 is connected with the liquid collecting disc bottom plate assembly 42 by hot melting welding, and the upper part of the wall plate 6 is sealed by FRP covering at the connecting position with the tower wall 8.

[0032] Further, the inner wall joint of the drain pipe 7 and the tower wall 8 is sealed by FRP, and the outer wall joint of the drain pipe 7 and the tower wall 8 is filled with soil.

[0033] Further, the FRP covering adhesive comprises pre-accelerated vinyl ester resin and an accelerator, and the pre-accelerated vinyl ester resin: accelerator is 3:1, and the FRP covering adhesive uses nylon cloth as a covering carrier.

[0034] Further, any one or more of the liquid blocking cap 1, the liquid collecting disc assembly 4, the liquid blocking ring plate 5, the wall plate 6 and the drain pipe 7 is made of PP material.

[0035] The working process of the application is as follows: saturated wet flue gas at a temperature of about 60 DEG C enters the wire mesh demister 2 from the air inlet 411 at the bottom of the device to achieve the purpose of flue gas demisting, and then the demisted flue gas is discharged from the wire mesh air outlet 412 on one side of the wire mesh demister 2, and fully contacts with the cooling circulating liquid flowing from top to bottom, so that the temperature of the flue gas is reduced, and the water content in the flue gas is also reduced, the outlet flue gas temperature of the wet flue gas tower is about 45-50 DEG C, which achieves the effect of dehumidification and demisting. At the same time, the condensed liquid is collected by the device, discharged through the drain pipe 7, and returned to the water tank for recycling after cooling.

[0036] The device is an integrated device that integrates flue gas dehumidification, flue gas demisting, cooling water collection and other functions, saves the occupied space and manufacturing materials of the system equipment, effectively reduces the manufacturing and installation cost and the operation and maintenance cost under the premise of ensuring the process performance, and thus expands the process application range of the industrial waste gas wet desulfurization system. The specific structural details can be verified, optimized and improved in the actual engineering test process.

[0037] The above embodiments are illustrative of the application, but not limiting of the application, and any simple transformation of the application also belongs to the protection scope of the application.

Claims

1. A device for dehumidification, demisting and liquid collection for a wet flue gas desulfurization system, characterized in that: The utility model provides a kind of demisting collective device, including the body of demisting collective device installed in tower body, the body of demisting collective device includes liquid blocking cap (1), wire mesh demister (2), liquid collecting tray assembly (4), liquid blocking annular plate (5), wallboard (6) and drain pipe (7), the upper of the liquid collecting tray assembly (4) is arranged with several liquid collecting tray air inlet channels (41) side by side, the lower of the liquid collecting tray assembly (4) is connected with tower wall (8) by liquid collecting tray bottom plate assembly (42), the top of the liquid collecting tray air inlet channel (41) is equipped with liquid blocking cap (1), the liquid collecting tray air inlet channel (41) is equipped with wire mesh demister (2), the bottom of the liquid collecting tray air inlet channel (41) has air inlet (411), side wall is equipped with wire mesh air outlet (412), the liquid blocking annular plate (5) is installed inside tower wall (8) and is located the upper of liquid collecting tray bottom plate assembly (42), wallboard (6) is equipped between the liquid blocking annular plate (5) and liquid collecting tray bottom plate assembly (42), the outer wall of wallboard (6) is attached to the inner wall of tower wall (8), the liquid collecting tray bottom plate assembly (42) and wallboard (6) form liquid collecting discharge area (40) between them, the outside of tower wall (8) is equipped with drain pipe (7) being communicated with liquid collecting discharge area (40), the liquid blocking cap (1) includes two symmetrically arranged liquid blocking deflector (11), the liquid blocking deflector (11) is arranged downwardly inclined, the low end of the liquid blocking deflector (11) is equipped with cooling liquid deflector (12) extending vertically upward, the both sides of the liquid collecting tray air inlet channel (41) are symmetrically equipped with wire mesh demister (2), the lower of each wire mesh demister (2) is equipped with air inlet guide plate (3) respectively, the lower wall of the air inlet guide plate (3) is arranged inclined, two air inlet guide plates (3) form wire mesh air inlet flow port (30) being communicated with air inlet (411) between them, the upper of the air inlet guide plate (3) is equipped with supporting plate (31) being arranged inclined by 15 °, the inner ring of the liquid blocking annular plate (5) is arranged downwardly inclined, and the included angle with horizontal plane is 15 °-30 °, the junction of the outer ring of the liquid blocking annular plate (5) and tower wall (8) is sealed by FRP cladding, the FRP cladding is double-sided cladding, and the gap is filled with soil before cladding, and then cladded by FRP, the soil is configured by 901 resin and SiO2 according to 1:10-15 mass ratio.

2. The device for dehumidification, demisting, and liquid collection integrated into the exhaust gas wet desulfurization system according to claim 1, characterized in that: The lower part of the wallboard (6) is hot melt welded with the liquid collecting tray bottom plate assembly (42), and the upper part is sealed by FRP cladding at the junction with the tower wall (8).

3. The device for integration of dehumidification, demisting and liquid collection for a wet flue gas desulfurization system according to claim 1, characterized in that: The inner wall junction of the drain pipe (7) and the tower wall (8) is sealed by FRP cladding, and the outer wall junction of the drain pipe (7) and the tower wall (8) is filled with soil.

4. The dehumidification, demisting, and liquid collecting integrated device for a wet flue gas desulfurization system according to any one of claims 1 to 3, characterized in that: The cladding adhesive used in the FRP cladding includes pre-accelerated vinyl ester resin and accelerator, the pre-accelerated vinyl ester resin: accelerator is 3:1, and the cladding carrier used in the FRP cladding is nylon cloth strip.

5. The device for integration of dehumidification, demisting and liquid collection according to claim 1, wherein: Any one or more of the liquid blocking cap (1), the liquid collecting tray assembly (4), the liquid blocking annular plate (5), the wall plate (6), and the drain pipe (7) is made of PP.

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