Flue gas denitration tower of annealing furnace

Abstract

The utility model discloses an annealing furnace flue gas denitration tower which comprises a tower base, a plurality of denitration cylinders are arranged on the upper side of the tower base in parallel, a smoke inlet pipe is fixedly embedded in the bottom of the denitration cylinder on the leftmost side, and a smoke exhaust pipe is fixedly embedded in the top of the denitration cylinder on the rightmost side. A flue pipe for guiding flue gas to flow downwards is connected between every two adjacent denitration cylinders, the flue gas subjected to dust removal treatment is pumped into the first denitration cylinder from the flue gas inlet pipe by high pressure, and under the action of buoyancy, the flue gas entering the denitration cylinders rapidly moves upwards from the bottom of the denitration solvent until the air pressure at the top of the first denitration cylinder is enough, and then the flue gas enters the first denitration cylinder. And part of the flue gas enters the second denitration barrel through the flue pipe, the denitration process is carried out again, and so on, the flue gas can be guaranteed to be completely denitrated, the construction height of the denitration tower is shortened, the denitration process is synchronously carried out in each denitration barrel, the rising speed of flue gas bubbles is delayed, and efficient and sufficient denitration is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas denitration technology field especially, it is an annealing furnace flue gas denitration tower. BACKGROUND

[0002] Annealing furnace is classified according to heat source mainly electric heating furnace, coal-fired annealing furnace, oil-fired annealing furnace, natural gas annealing furnace, gas annealing furnace etc., and among them, gas annealing furnace is most widely used, and gas annealing furnace reduces combustion chamber, directly utilizes gas burner to spray combustion in heating chamber, and harmful gas is produced in combustion, and to reduce the pollution of annealing furnace flue gas to atmosphere can only pass through denitration process, and denitration refers to the process of removing flue gas nitrogen oxide compound, because nitrogen oxide compound meets water and will form acid rain and other harmful substances, and is discharged into atmosphere and will form acid rain and cause loss, therefore, flue gas denitration is also one of important industrial environmental management means;

[0003] Chinese patent publication No. CN217392039U discloses a kind of high-efficiency flue gas denitration tower, including denitration tower body, the one end of the denitration tower body is provided with flue gas inlet, and the other end is provided with flue gas outlet, the flue gas inlet end is connected with flue gas inlet pipe, the bottom of the flue gas inlet end of the denitration tower body is provided with denitration solvent, the flue gas inlet pipe extends into the denitration solvent in the denitration tower body, three layers NaCLO spray mechanism are arranged at the upper air inlet end of the denitration tower body, and flow baffle is arranged between adjacent NaCLO spray mechanism, which directly discharges flue gas into reagent for denitration, not only prolongs the time between flue gas and denitration reagent, makes denitration more thorough, and denitration efficiency is high, also can more fully utilize reagent, reduce waste of reagent, is friendly to environment, and operating cost is less;

[0004] The above-mentioned technology strengthens the denitration reaction of denitration solvent and flue gas by aeration and spraying, in order to achieve the expected denitration effect, it is necessary to increase the depth of denitration solvent and the overall height of denitration tower, which leads to large space occupied by equipment, and is not conducive to later maintenance, therefore, the utility model discloses an annealing furnace flue gas denitration tower for solving the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an annealing furnace flue gas denitration tower to solve the problem of insufficient utilization of denitration agent in the traditional denitration tower and the problem of too high height of denitration tower, which leads to large space occupied by equipment and is not conducive to later maintenance.

[0006] In order to achieve the above object, the utility model discloses the following technical solutions for solving the above technical problems: an annealing furnace flue gas denitration tower, including the base, the upper side of base is parallel with a plurality of denitration cylinder, wherein, the bottom fixed embedding of leftmost denitration cylinder is with the flue inlet pipe, the top fixed embedding of rightmost denitration cylinder is with the flue outlet pipe, the adjacent denitration cylinder is all connected with the flue pipe for guiding the flue gas to flow down, the top of denitration cylinder all communicates with the liquid inlet pipe, the bottom of denitration cylinder all communicates with the liquid outlet pipe, all be installed in the stirring assembly of denitration cylinder, the bottom of stirring assembly all extends to the base with drive assembly transmission connection.

[0007] As a further scheme of the utility model, the top end of the flue pipe is fixedly embedded at the top end side wall of one side denitration cylinder, and the bottom end of the flue pipe is fixedly embedded at the bottom end side wall of the other side denitration cylinder.

[0008] As a further scheme of the utility model, the bottom inner wall of the denitration cylinder is fixedly embedded with a gas distribution plate, the gas distribution plate is densely provided with gas distribution holes which are narrow at the top and wide at the bottom, and the height of the gas distribution plate is greater than the height of the flue inlet pipe and the height of the bottom end port of the flue pipe.

[0009] As a further scheme of the utility model, the stirring assembly comprises a rotating shaft rotatably embedded in the middle part of the bottom wall of the denitration cylinder, the part of the rotating shaft located in the denitration cylinder is fixedly provided with a plurality of connecting rings at equal intervals, the connecting rings are all located above the gas distribution plate, the two sides of the connecting ring are fixedly connected with stirring blades, and the bottom end of the rotating shaft extends into the base.

[0010] As a further scheme of the utility model, the drive assembly comprises a drive motor fixedly connected to one side of the base and a horizontal shaft rotatably connected between the inner walls of the two sides of the base, a plurality of driving bevel gears are fixedly sleeved on the horizontal shaft, the driving bevel gears are all meshingly connected with driven bevel gears, and the driven bevel gears are all fixedly connected with adjacent rotating shafts.

[0011] As a further scheme of the utility model, the lower side of the liquid inlet pipe is fixedly embedded with a plurality of flow guide pipes, the bottom end of the flow guide pipe extends into the adjacent denitration cylinder, and one end of the flow guide pipe located in the denitration cylinder is fixedly provided with a spray head.

[0012] As a further scheme of the utility model, the liquid outlet pipe is embedded in one side of the base, the upper side of the liquid outlet pipe is fixedly embedded with a plurality of discharge pipes, and the top end of the discharge pipe extends into the adjacent denitration cylinder.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1. The utility model relates to an annealing furnace flue gas denitration tower, flue gas after dust removal treatment is from the smoke pipe by high pressure pump into the first denitration cylinder, under the action of buoyancy, the flue gas that enters the denitration cylinder moves rapidly from the bottom of denitration solvent upwards, after the air pressure at the top of the first denitration cylinder is enough, part of flue gas will enter the second denitration cylinder through the flue pipe, carries out the above-mentioned denitration process again, and the like, can guarantee that the flue gas can be denitrified completely, the construction height of denitration tower is shortened, and the denitration process is carried out simultaneously in each denitration cylinder, delays the ascending speed of flue gas bubble, is favorable for efficient, sufficient denitration;

[0015] 2. The utility model relates to an annealing furnace flue gas denitration tower, the gas distribution plate can play the role of dispersing bubble, can increase the contact area of flue gas and denitration solvent, and the driving motor drives the horizontal shaft to rotate, the horizontal shaft drives the driving bevel gear to rotate, the driving bevel gear engages transmission driven bevel gear, and the driven bevel gear drives the rotating shaft high -speed rotation, so that the stirring blade can agitate denitration solvent, is favorable for keeping the uniformity of denitration solvent concentration, guarantees the denitration effect of different heights in the denitration cylinder;

[0016] 3. The utility model relates to an annealing furnace flue gas denitration tower, in the flue gas denitration process, new denitration solvent is pumped into the spray head by the liquid inlet pipe, and the spray head diffuses the denitration solvent fully, can realize secondary denitration, simultaneously, the pipe valve of liquid outlet pipe opens, so that the denitration solution in the denitration cylinder can partially discharge, thereby guaranteeing that the liquid level in the denitration cylinder always keeps constant, avoids the situation that the denitration effect is difficult to reach the expectation due to the continuous decrease of denitration solvent concentration. ACCURACY OF DRAWINGS

[0017] The utility model is further explained in connection with the drawings and examples as follows:

[0018] Figure 1 It is the front view of the utility model kind annealing furnace flue gas denitration tower;

[0019] Figure 2 It is the front view of the utility model kind annealing furnace flue gas denitration tower;

[0020] Figure 3 It is the structure of the utility model kind annealing furnace flue gas denitration tower appendix Figure 2 Enlarged view of place A;

[0021] Figure 4 It is the three-dimensional structure diagram of the utility model kind annealing furnace flue gas denitration tower;

[0022] Figure 5 It is the structure cutaway view of the utility model kind annealing furnace flue gas denitration tower denitration cylinder;

[0023] Figure 6 It is the plan view of the utility model kind annealing furnace flue gas denitration tower.

[0024] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0025] 1, tower seat; 2, denitration cylinder; 21, air distribution plate; 22, air distribution hole; 3, smoke inlet pipe; 4, smoke exhaust pipe; 5, flue pipe; 6, liquid inlet pipe; 61, flow guide pipe; 62, spray head; 7, liquid outlet pipe; 71, flow outlet pipe; 8, stirring assembly; 81, rotating shaft; 82, connecting ring; 83, stirring blade; 9, driving assembly; 91, driving motor; 92, cross shaft; 93, driving bevel gear; 94, driven bevel gear. DETAILED DESCRIPTION

[0026] The utility model will be further described below in combination with examples.

[0027] Please refer to Figures 1-6 The utility model provides a kind of annealing furnace flue gas denitration tower, including tower seat 1, the upper side of the tower seat 1 is parallel with multiple denitration cylinders 2, the top end of the flue pipe 5 is fixedly embedded in the side denitration cylinder 2 top end side wall, adjacent the denitration cylinder 2 between are all connected with flue pipe 5 for guiding flue gas to flow down, the bottom end of the flue pipe 5 is fixedly embedded in the other side denitration cylinder 2 bottom end side wall;

[0028] Specifically, flue pipe 5 can guide flue gas from one denitration cylinder 2 to another denitration cylinder 2, realize the continuous flow and denitration treatment of flue gas between denitration cylinder 2, flue gas can flow from bottom to top when entering next denitration cylinder 2, and fully contact with denitration solvent, realize more effective denitration, it is worth mentioning that, by the segmented design of traditional denitration tower, the design height of denitration tower can be reduced, and the convenience of later maintenance is improved, compared with directly increasing the liquid level depth of denitration solvent in denitration tower, the mode delays the upward speed of flue gas bubble, is conducive to efficient and sufficient denitration.

[0029] Further, the bottom of the leftmost denitration cylinder 2 is fixedly embedded with smoke inlet pipe 3, the top of the rightmost denitration cylinder 2 is fixedly embedded with smoke exhaust pipe 4, the inner wall of the bottom of the denitration cylinder 2 is fixedly embedded with air distribution plate 21, the air distribution plate 21 is densely covered with air distribution hole 22 of upper narrow and lower wide, and the height of the air distribution plate 21 is greater than the height of smoke inlet pipe 3 and the height of the bottom end port of flue pipe 5.

[0030] Specifically, smoke inlet pipe 3 can guide the entry of flue gas containing nitrogen into the system, and smoke exhaust pipe 4 can guide the discharge of denitration flue gas from the system, flue gas can be uniformly distributed on the cross section of denitration cylinder 2 when entering denitration cylinder 2 by passing through air distribution plate 21, flue gas forms uniform bubbles when passing through air distribution hole 22, further promotes the mixing and contact of flue gas and denitration solvent.

[0031] Further, the top end of the denitration cylinder 2 is communicated with the liquid inlet pipe 6, the lower side of the liquid inlet pipe 6 is fixedly embedded with a plurality of flow guide pipes 61, the bottom end of the flow guide pipe 61 extends into the adjacent denitration cylinder 2, and one end of the flow guide pipe 61 in the denitration cylinder 2 is fixedly provided with a spray head 62;

[0032] Specifically, the flow guide pipe 61 helps to uniformly distribute the denitration solution into each denitration cylinder 2, and the spray head 62 serves to fully diffuse the denitration solution and increase the contact area between the denitration solution and the flue gas, thereby improving the denitration efficiency and ensuring the denitration effect.

[0033] Further, the bottom end of the denitration cylinder 2 is communicated with the liquid outlet pipe 7, the liquid outlet pipe 7 is embedded on one side of the tower base 1, the upper side of the liquid outlet pipe 7 is fixedly embedded with a plurality of flow outlet pipes 71, and the top end of the flow outlet pipe 71 extends into the adjacent denitration cylinder 2;

[0034] Specifically, when the spray head 62 sprays the denitration solution, the valve of the liquid outlet pipe 7 is opened, so that the denitration solution in the denitration cylinder 2 can be partially discharged, thereby ensuring that the liquid level in the denitration cylinder 2 remains unchanged at all times, helping to maintain the concentration of the denitration solution in the denitration cylinder 2 and ensuring the denitration effect, while avoiding the situation that the denitration effect is difficult to achieve as expected due to the continuous decrease in the concentration of the denitration solution.

[0035] Further, the denitration cylinder 2 is provided with a stirring assembly 8, the stirring assembly 8 comprises a rotating shaft 81 rotatably embedded in the middle of the bottom wall of the denitration cylinder 2, a plurality of connecting rings 82 are fixedly arranged at equal intervals on the part of the rotating shaft 81 in the denitration cylinder 2, the connecting ring 82 is located above the gas distribution plate 21, a stirring blade 83 is fixedly connected to the two sides of the connecting ring 82, and the bottom end of the rotating shaft 81 extends into the tower base 1;

[0036] Specifically, the rotating shaft 81 can drive the stirring blade 83 to rotate, so that the stirring blade 83 stirs the denitration solution, which is conducive to maintaining the uniformity of the concentration of the denitration solution and ensuring the denitration effect at different heights in the denitration cylinder 2.

[0037] Further, the bottom end of the stirring assembly 8 extends into the tower base 1 and is drivingly connected with a driving assembly 9, the driving assembly 9 comprises a driving motor 91 fixedly connected to one side of the tower base 1 and a horizontal shaft 92 rotatably connected between the inner walls of the two sides of the tower base 1, a plurality of driving bevel gears 93 are fixedly sleeved on the horizontal shaft 92, a driven bevel gear 94 is engagedly connected to each driving bevel gear 93, and the driven bevel gear 94 is fixedly connected with the adjacent rotating shaft 81;

[0038] Specifically, the driving assembly 9 can effectively transmit the power of the motor to the stirring assembly 8 in the denitration cylinder 2, and the uniformity of the denitration solution is maintained through the rotation of the stirring blade 83, which is crucial for improving the denitration efficiency and ensuring the denitration effect.

[0039] Working principle: in use, after the dust removal treatment of flue gas from the smoke pipe 3 is high pressure pump into the first denitration cylinder 2, under the action of buoyancy, into the denitration cylinder 2 of flue gas rapidly from the bottom of the denitration solvent to the top, in the process, the gas distribution plate 21 can play the role of dispersion bubble, can increase the contact area of flue gas and denitration solvent, and the driving motor 91 drive shaft 92 rotation, shaft 92 drive driving bevel gear 93 rotation, driving bevel gear 93 meshing transmission driven bevel gear 94, driven bevel gear 94 drive shaft 81 high speed rotation, so that the stirring blade 83 can stir the denitration solvent, is conducive to the uniformity of the concentration of denitration solvent, guarantee the denitration effect of different height in the denitration cylinder 2, after the flue gas bubble float out of the liquid level, the new denitration solvent is pumped into the liquid inlet pipe 6 spray head 62, and the spray head 62 will be fully dispersed denitration solvent, can realize secondary denitration, at the same time, the drain pipe 7 pipe valve opens, so that the denitration solution in the denitration cylinder 2 can be partially discharged, so as to guarantee the denitration cylinder 2 always keep liquid level unchanged, until the first denitration cylinder 2 top gas pressure enough, part of the flue gas will be flue pipe 5 into the second denitration cylinder 2, again for the above denitration process, in this way, can guarantee that the flue gas can be denitration completely.

Claims

1. An annealing furnace flue gas denitration tower comprising a tower base (1), characterized in that, The upper side of the tower seat (1) is provided with a plurality of denitration cylinders (2), wherein the bottom of the leftmost denitration cylinder (2) is fixedly embedded with a smoke inlet pipe (3), the top of the rightmost denitration cylinder (2) is fixedly embedded with a smoke exhaust pipe (4), the adjacent denitration cylinders (2) are connected with flue pipes (5) for guiding the downward flow of flue gas, the top of each denitration cylinder (2) is connected with a liquid inlet pipe (6), the bottom of each denitration cylinder (2) is connected with a liquid outlet pipe (7), and each denitration cylinder (2) is provided with a stirring assembly (8) extending to the tower seat (1) and drivingly connected with a driving assembly (9).

2. The flue gas denitration tower of the annealing furnace according to claim 1, characterized in that: The top end of the flue pipe (5) is fixedly embedded in the top end side wall of one side of the denitration cylinder (2), and the bottom end of the flue pipe (5) is fixedly embedded in the bottom end side wall of the other side of the denitration cylinder (2).

3. The flue gas denitration tower of the annealing furnace according to claim 1, characterized in that: The bottom inner wall of the denitration cylinder (2) is fixedly embedded with a gas distribution plate (21), the gas distribution plate (21) is densely provided with gas distribution holes (22) which are narrow at the top and wide at the bottom, and the height of the gas distribution plate (21) is greater than the height of the smoke inlet pipe (3) and the height of the bottom port of the flue pipe (5).

4. The flue gas denitration tower of the annealing furnace according to claim 3, characterized in that: The stirring assembly (8) comprises a rotating shaft (81) rotatably embedded in the middle of the bottom wall of the denitration cylinder (2), a plurality of connecting rings (82) are fixedly arranged at equal intervals on the part of the rotating shaft (81) in the denitration cylinder (2), the connecting rings (82) are located above the gas distribution plate (21), stirring blades (83) are fixedly connected to the two sides of the connecting rings (82), and the bottom end of the rotating shaft (81) extends into the tower seat (1).

5. The flue gas denitration tower of the annealing furnace according to claim 4, characterized in that: The driving assembly (9) comprises a driving motor (91) fixedly connected to one side of the tower seat (1) and a horizontal shaft (92) rotatably connected between the inner walls of the two sides of the tower seat (1), a plurality of driving bevel gears (93) are fixedly arranged on the horizontal shaft (92), the driving bevel gears (93) are all meshingly connected with driven bevel gears (94), and the driven bevel gears (94) are fixedly connected with the adjacent rotating shafts (81).

6. The flue gas denitration tower of the annealing furnace according to claim 1, characterized in that: The lower side of the liquid inlet pipe (6) is fixedly embedded with a plurality of flow guide pipes (61), the bottom end of each flow guide pipe (61) extends into the adjacent denitration cylinder (2), and one end of each flow guide pipe (61) in the denitration cylinder (2) is fixedly provided with a spray head (62).

7. The flue gas denitration tower of the annealing furnace according to claim 1, characterized in that: The liquid outlet pipe (7) is embedded in one side of the tower seat (1), the upper side of the liquid outlet pipe (7) is fixedly embedded with a plurality of discharge pipes (71), and the top end of each discharge pipe (71) extends into the adjacent denitration cylinder (2).

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