Flue gas purification device

Abstract

The flue gas purification device comprises a tower drum and a flue gas outlet pipe arranged at the top of the tower drum, an inner drum is vertically arranged in the tower drum, an annular cavity is formed by the tower drum and the inner wall of the inner drum, the lower end of the inner drum is fixed to the inner wall of the tower drum in a sealed mode through a conical cover, and a conical flow guide ring fixed to the inner wall of the tower drum is arranged at the upper end of the inner drum; an annular pipe is arranged in an annular cavity in the upper end of the conical cover, a spray head is hinged to the upper end of the annular pipe, and the annular pipe enters an absorbent through a liquid inlet pipe. According to the flue gas purification device, the limestone absorbent is sprayed out from the spray head in the annular cavity and is sprayed into the inner cylinder through the gap between the inner cylinder and the flow guide ring, and flue gas penetrates through the inner cylinder, vertically ascends and is guided through the flow guide ring. The nozzle is located in the annular cavity, the inner barrel can effectively separate flue gas from the nozzle, contact between the flue gas and the nozzle is reduced, the reaction amount of the flue gas and a limestone absorbent at the nozzle is reduced, the scaling and blocking frequency of the nozzle is reduced, and the service time is prolonged.

Description

Technical Field

[0001] The present application relates to a flue gas desulfurization and purification technology for brick-making, and in particular to a flue gas purification device. Background Art

[0002] Brick-making flue gas contains a large amount of smoke and sulfide, which needs to be removed through bag dust removal and desulfurization tower before discharge.

[0003] In the existing flue gas purification device, the flue gas enters from the lower end of the tower and then rises. The limestone absorbent for desulfurization is sprayed from top to bottom. After the limestone absorbent contacts the flue gas in reverse direction, it absorbs the sulfide in the flue gas. The desulfurized flue gas continues to rise and is discharged from the flue gas outlet pipe. The lime emulsion falls to the bottom of the tower and is discharged from the liquid outlet pipe.

[0004] In the existing flue gas purification device, the flue gas rises and passes through the nozzle. When the limestone absorbent is sprayed out from the nozzle, it reacts with the sulfide in the flue gas at the nozzle and absorbs it, which makes it easy for the nozzle to scale and clog the limestone absorbent nozzle, requiring frequent cleaning. Utility Model Content

[0005] The present application provides a flue gas purification device, which is used to solve the problem that the absorption reaction position of the existing flue gas purification device is close to the nozzle, causing the nozzle to be easily blocked.

[0006] The present application provides a flue gas purification device, comprising a tower and a smoke outlet pipe arranged at the top thereof, wherein an inner cylinder is vertically arranged in the tower to form an annular cavity with its inner wall, the lower end of the inner cylinder is sealed and fixed to the inner wall of the tower through a conical cover, and the upper end is provided with a conical guide ring fixed to the inner wall of the tower, an annular cavity at the upper end of the conical cover is provided, a nozzle is hinged on the upper end of the annular tube, and absorbent enters the annular tube through a liquid inlet pipe.

[0007] Optionally, a drain port is provided at the lower end of the conical cover.

[0008] Optionally, two layers of mesh plates with a gap are fixed in the inner cylinder, and filler balls are filled between the two layers of mesh plates.

[0009] Optionally, a rotating shaft is vertically inserted through the upper mesh plate at the center of the tower, a stirring rod arranged between two layers of mesh plates is fixed to the lower end of the rotating shaft, a motor is installed on the outer wall of the tower, and the output shaft of the motor is transmission-connected to the rotating shaft through a steering gear.

[0010] Optionally, the mesh plates are slidably connected to the inner cylinder up and down, and fixing blocks are respectively fixed to the upper and lower ends of the inner cylinder, and the fixing blocks are connected to adjacent mesh plates via springs.

[0011] Optionally, a demister is fixed to the upper end of the guide ring, and a cone net with a cone surface facing downward is fixed to the lower end of the demister.

[0012] Compared with the prior art, the flue gas purification device provided by the present application has the following beneficial effects:

[0013] The limestone absorbent is sprayed out from the nozzle in the annular cavity, and sprayed into the inner cylinder through the gap between the inner cylinder and the guide ring. The flue gas passes through the inner cylinder and rises vertically, and is guided by the guide ring. The nozzle is in the annular cavity, and the inner cylinder can effectively separate the flue gas and the nozzle, reduce the contact between the flue gas and the nozzle, reduce the reaction amount of the flue gas and the limestone absorbent at the nozzle, reduce the frequency of scaling and clogging of the nozzle, and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A schematic diagram of the structure of a flue gas purification device provided in one embodiment of the present application;

[0016] Figure 2 A cross-sectional view at EE of a flue gas purification device provided in one embodiment of the present application;

[0017] Figure 3 A schematic diagram of filling with packing balls for a flue gas purification device provided in one embodiment of the present application.

[0018] Description of reference numerals:

[0019] Tower 1; inner tube 2; conical cover 3; annular tube 4; nozzle 5; guide ring 6; liquid inlet pipe 7; liquid discharge port 8; mesh plate 9; filler ball 10; fixed block 11; spring 12; rotating shaft 13; stirring rod 14; motor 15; steering gear 16; demister 17; cone net 18; smoke outlet pipe 19. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0021] like Figure 1-Figure 3As shown, an embodiment of the present application provides a flue gas purification device, including a tower 1 and a smoke outlet pipe 19 arranged on the top thereof, wherein an inner tube 2 is vertically arranged in the tower 1 to form an annular cavity with its inner wall, the lower end of the inner tube 2 is sealed and fixed to the inner wall of the tower 1 through a conical cover 3, and the upper end is provided with a conical guide ring 6 fixed to the inner wall of the tower 1, an annular cavity at the upper end of the conical cover 3 is provided with an annular tube 4, a nozzle 5 is hinged on the upper end of the annular tube 4, and the absorbent enters the annular tube 4 through a liquid inlet pipe 7.

[0022] When in use, the flue gas enters from the lower end of the tower 1 and rises. After the limestone absorbent enters the ring pipe 4 through the liquid inlet pipe 7, it is sprayed out from the gap between the inner tube 2 and the guide ring 6 through the nozzle 5. The limestone absorbent is sprayed to cover the inner cross section of the inner tube 2. When the rising flue gas passes through the inner tube 2, the sulfur dioxide in the flue gas is absorbed by the limestone absorbent. The purified flue gas continues to rise and passes through the guide ring 6 and is finally discharged from the smoke outlet pipe 19. The lime emulsion after absorbing sulfur dioxide falls from the inner tube 2 to the bottom of the tower 1 and is pumped into the sedimentation tank through the liquid outlet pipe.

[0023] In this embodiment, the limestone absorbent is sprayed out from the nozzle 5 in the annular cavity, and is sprayed into the inner cylinder 2 through the gap between the inner cylinder 2 and the guide ring 6. The flue gas passes through the inner cylinder 2 and rises vertically, and is guided by the guide ring 6. The nozzle 5 is in the annular cavity, and the inner cylinder 2 can effectively separate the flue gas and the nozzle 5, reduce the contact between the flue gas and the nozzle 5, reduce the reaction amount of the flue gas at the nozzle 5 and the limestone absorbent, reduce the frequency of scaling and clogging of the nozzle 5, and extend the service life.

[0024] In a possible implementation, a liquid discharge port 8 is provided at the lower end of the conical cover (3).

[0025] The liquid discharge port 8 is used to discharge the accumulated liquid accidentally entering the annular cavity surrounded by the conical cover 3 and the inner cylinder 2 .

[0026] In a possible implementation, two layers of mesh plates 9 with a gap are fixed in the inner tube 2 , and filler balls 10 are filled between the two layers of mesh plates 9 .

[0027] By setting a mesh plate to fix the packing balls 10 in the inner tube 2, the flow velocity of the flue gas at the packing balls 10 can be slowed down, and the absorption reaction can be carried out at the packing balls 10. The sulfide in the flue gas can be absorbed more fully, and the scaling of the reaction can be caused at the packing balls 10, and the scaling on the packing balls 10 is easier to clean.

[0028] In a possible implementation, a rotating shaft 13 is vertically inserted through the upper mesh plate 9 at the center of the tower 1, a stirring rod 14 arranged between two layers of mesh plates 9 is fixed to the lower end of the rotating shaft 13, a motor 15 is installed on the outer wall of the tower 1, and the output shaft of the motor 15 is transmission-connected to the rotating shaft 13 via a steering gear 16.

[0029] The motor 15 can drive the stirring rod 14 to rotate between the mesh plates 9 through the rotating shaft 13, and the stirring rod 14 stirs the filler balls 10 to generate friction between each other, so as to clean the scale on the filler balls 10. The fallen scale falls to the bottom of the tower 1 and is discharged from the liquid outlet pipe.

[0030] In a possible implementation, the mesh plate 9 is slidably connected to the inner cylinder 2 up and down, and fixing blocks 11 are respectively fixed to the upper and lower ends of the inner cylinder 2 . The fixing blocks 11 are connected to the adjacent mesh plates 9 via springs 12 .

[0031] The mesh plate 9 slidably connected to the inner tube 2 has space for upward and downward movement. The connection through the spring 12 can generate a larger friction range in the process of stirring the filler balls 10, thereby improving the cleaning effect of descaling.

[0032] In a possible implementation, a demister 17 is fixed to the upper end of the guide ring 6 , and a cone net 18 with a cone surface facing downward is fixed to the lower end of the demister 17 .

[0033] The demister 17 can effectively separate the flue gas and the liquid droplets. When the liquid droplets fall, the cone net 18 can play a guiding role, so that the liquid droplets fall more concentratedly from the middle of the tower 1, avoiding affecting the flow of the rising flue gas. At the same time, it also reduces the flue gas from lifting the falling droplets, thereby improving the demisting efficiency.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A flue gas purification device, comprising a tower (1) and a smoke outlet pipe (19) arranged at the top thereof, characterized in that: An inner cylinder (2) is vertically arranged in the tower (1) to form an annular cavity with its inner wall; the lower end of the inner cylinder (2) is sealed and fixed to the inner wall of the tower (1) via a conical cover (3); the upper end is provided with a conical guide ring (6) fixed to the inner wall of the tower (1); an annular cavity at the upper end of the conical cover (3) is provided with an annular tube (4); a nozzle (5) is hingedly connected to the upper end of the annular tube (4); absorbent enters the annular tube (4) through a liquid inlet pipe (7).

2. The flue gas purification device according to claim 1, characterized in that: A liquid discharge port (8) is provided at the lower end of the conical cover (3).

3. The flue gas purification device according to claim 1, characterized in that: Two layers of mesh plates (9) with a gap are fixed in the inner cylinder (2), and filler balls (10) are filled between the two layers of mesh plates (9).

4. The flue gas purification device according to claim 3, characterized in that: A rotating shaft (13) is vertically inserted through the center of the tower (1) through the upper mesh plate (9), and a stirring rod (14) arranged between two layers of mesh plates (9) is fixed to the lower end of the rotating shaft (13). A motor (15) is installed on the outer wall of the tower (1), and the output shaft of the motor (15) is transmission-connected to the rotating shaft (13) through a steering gear (16).

5. The flue gas purification device according to claim 4, characterized in that: The mesh plate (9) is slidably connected to the inner cylinder (2) up and down. Fixed blocks (11) are respectively fixed at the upper and lower ends of the inner cylinder (2). The fixed blocks (11) are connected to adjacent mesh plates (9) via springs (12).

6. The flue gas purification device according to any one of claims 1 to 5, characterized in that: A demister (17) is fixed to the upper end of the guide ring (6), and a cone net (18) with a cone surface facing downward is fixed to the lower end of the demister (17).

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