Desulfurizing absorption tower with porous tray

Abstract

The utility model discloses a desulfurizing absorption tower with a porous tray, which relates to the technical field of flue gas treatment and comprises a treatment absorption tower, a flue gas inlet and a flue gas outlet, the flue gas inlet and the flue gas outlet are arranged on the treatment absorption tower, an oxygen supply stirring pipe is arranged at the lower part in the treatment absorption tower, and an absorption tray is arranged above the oxygen supply stirring pipe. The oxygen supply stirring pipe and the absorption tray are respectively positioned below and above the smoke inlet; a spraying pipe is arranged on the absorption tray, a demister is arranged above the spraying pipe, flushing pipes are arranged on the upper side and the lower side of the demister, and nozzles of the upper flushing pipe and the lower flushing pipe face the demister; the absorption tray comprises a supporting seat, a supporting frame and a tray plate; the supporting seat and the supporting frame are both of a circular ring structure, and the circumferential outer wall of the supporting seat is fixedly connected with the circumferential inner wall of the treatment absorption tower; flue gas and slurry are fully contacted and reacted, the desulfurization efficiency is improved, slurry precipitation is avoided, and the reaction quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas treatment technical field, concretely is a kind of desulfurization absorption tower with porous tray. BACKGROUND

[0002] Flue gas generated by coal-fired boiler generally needs to carry out denitration, dust removal, desulfurization, and after removing the pollutants in flue gas, it is discharged into atmosphere again;Desulfurization generally adopts limestone gypsum method desulfurization process, sets up spray empty tower, slurry pool area, tray area, spray area and demisting area are set in tower.

[0003] However, the porous tray in the existing absorption tower is all single-layer setting, when flue gas passes through liquid holding layer, flue gas and slurry in liquid holding layer contact for short time, cannot fully contact and react, part of flue gas still contains sulfur dioxide, reduces the quality of sulfur dioxide desulfurization, and slurry is gathered in absorption tower bottom, easy to deposit, is not conducive to accelerating reaction;

[0004] Therefore, a kind of desulfurization absorption tower with porous tray is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of desulfurization absorption tower with porous tray, make flue gas and slurry fully contact and react, improve desulfurization efficiency, and avoid slurry deposition, improve the quality of reaction.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of desulfurization absorption tower with porous tray, including processing absorption tower, the smoke inlet and the smoke outlet being set on the processing absorption tower, the lower part of the inside of the processing absorption tower is provided with oxygen supply agitator pipe, the oxygen supply agitator pipe upper portion is provided with absorption tray, the oxygen supply agitator pipe and absorption tray are located below and above the smoke inlet respectively;Spray pipe is arranged on the absorption tray, the upper portion of the spray pipe is provided with demister, the upper and lower sides of the demister are both provided with flush pipe, and the nozzles of the upper and lower flush pipes are all towards demister;The absorption tray includes support seat, support frame, tray plate;The support seat and support frame are both annular structure, the circumferential outer wall of the support seat is fixedly connected with the circumferential inner wall of processing absorption tower, the support frame is located above support seat, and the support frame is detachably connected with support seat by bolt, the tray plate is arranged in support frame, the top of the tray plate is provided with a plurality of flow guide holes, the number of tray plate is two, and two are arranged above and below, the flow guide holes of upper tray plate and the flow guide holes on lower tray plate are staggered arrangement;The side of the processing absorption tower is provided with slurry tank, the slurry tank is provided with pump, the input end of the pump is communicated with slurry tank by pipeline, and the output end of the pump is communicated with spray pipe and flush pipe by pipeline respectively.

[0007] In order to easily improve the desulfurization efficiency, as a kind of desulfurization absorption tower with perforated tray of the utility model preferably, the oxygen supply stirring pipe includes rectangular pipe, the nozzle on the upper and lower two sides of the outer wall of the rectangular pipe is set;The left and right sides of the rectangular pipe are respectively provided with driving rod, oxygen supply pipe;The two sides below the treatment absorption tower are respectively provided with first motor, oxygen supply machine;The output end of the first motor is fixedly connected with the other end of the driving rod through the shaft, and the output end of the oxygen supply machine is communicated with the other end of the oxygen supply pipe through the shaft coupling.

[0008] In order to easily select the mist eliminator, as a kind of desulfurization absorption tower with perforated tray of the utility model preferably, the mist eliminator can adopt ridge type mist eliminator or flat plate type mist eliminator.

[0009] In order to be recycled to handle the water at the bottom of the absorption tower, as a kind of desulfurization absorption tower with perforated tray of the utility model preferably, the oxygen supply stirring pipe is provided with reflux pipe above, one end of the reflux pipe is provided with filter cover, the other end of the reflux pipe is communicated with the input end of the pump, and the pipeline between the pump and the slurry tank is provided with control valve.

[0010] In order to easily mix and stir the lime powder and water in the slurry tank, as a kind of desulfurization absorption tower with perforated tray of the utility model preferably, the top of the slurry tank is provided with feeding port, the slurry tank is provided with stirring paddle, the second motor is arranged on the slurry tank, and the output end of the second motor is fixedly connected with the stirring paddle through the shaft.

[0011] In order to easily clean the gypsum slurry at the bottom of the treatment absorption tower, as a kind of desulfurization absorption tower with perforated tray of the utility model preferably, the bottom of the treatment absorption tower is funnel-shaped, the bottom of the treatment absorption tower is provided with discharge pipe, and the discharge valve is arranged on the discharge pipe.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. The utility model, the liquid film is formed in the flow guide hole of the tray plate, the flue gas passes through the liquid holding layer from bottom to top, and the flow guide hole of the tray plate above is staggered with the flow guide hole on the tray plate below, so that the slurry and the flue gas are fully contacted, the absorption of sulfur dioxide is more sufficient, and the desulfurization efficiency can be improved.

[0014] 2. The utility model, the oxygen supply stirring pipe stirs and supplies oxygen to the slurry gathered at the bottom of the treatment absorption tower, the slurry after reaction often contains solid particles, stirring can prevent these particles from depositing at the bottom of the tower, keeps them in the suspended state in the slurry, is favorable for the reaction to proceed, and oxygen can accelerate the rate of chemical reaction, so that the reactants are more fully contacted and reacted, thereby improving the desulfurization efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a structure schematic view of the present application;

[0016] Fig. 2 It is a sectional structure schematic view of the absorption tray of the present application;

[0017] Fig. 3 It is a sectional structure schematic view of the oxygen supply stirring pipe of the present application.

[0018] In the figure: 1, smoke inlet; 2, smoke outlet; 3, oxygen supply stirring pipe; 4, absorption tray; 5, spray pipe; 6, demister; 7, flushing pipe; 8, support seat; 9, support frame; 10, tray plate; 11, flow guide hole; 12, slurry tank; 13, pump; 14, rectangular pipe; 15, nozzle; 16, drive rod; 17, oxygen supply pipe; 18, first motor; 19, oxygen supply machine; 20, return pipe; 21, filter cover; 22, control valve; 23, feeding port; 24, stirring paddle; 25, second motor; 26, discharge pipe; 27, discharge valve. DETAILED DESCRIPTION

[0019] Please refer to Figs. 1 to 3 A desulfurization absorption tower with a porous tray, comprising a treatment absorption tower, a smoke inlet 1 and a smoke outlet 2 arranged on the treatment absorption tower, an oxygen supply stirring pipe 3 arranged below the inside of the treatment absorption tower, an absorption tray 4 arranged above the oxygen supply stirring pipe 3, the oxygen supply stirring pipe 3 and the absorption tray 4 being located below and above the smoke inlet 1 respectively; a spray pipe 5 arranged on the absorption tray 4, a demister 6 arranged above the spray pipe 5, flushing pipes 7 arranged on the upper and lower sides of the demister 6, and the spray nozzles of the upper and lower flushing pipes 7 both facing the demister 6; the absorption tray 4 comprising a support seat 8, a support frame 9 and a tray plate 10; the support seat 8 and the support frame 9 both being circular ring structures, the circumferential outer wall of the support seat 8 being fixedly connected with the circumferential inner wall of the treatment absorption tower, the support frame 9 being located above the support seat 8 and being detachably connected with the support seat 8 through bolts, the tray plate 10 being arranged in the support frame 9, a plurality of flow guide holes 11 being formed in the top of the tray plate 10, the number of the tray plates 10 being two, and the two being arranged above and below, the flow guide holes 11 of the upper tray plate 10 being staggered with the flow guide holes 11 of the lower tray plate 10; a slurry tank 12 arranged on one side of the treatment absorption tower, a pump 13 arranged on the slurry tank 12, the input end of the pump 13 being communicated with the slurry tank 12 through a pipeline, and the output end of the pump 13 being communicated with the spray pipe 5 and the flushing pipe 7 through pipelines respectively.

[0020] In the embodiment, the flue gas enters the treatment absorption tower through the flue gas inlet 1, the pump 13 is started, the pump 13 transports the slurry in the slurry tank 12 to the spray pipe 5 and the flushing pipe 7, the slurry is sprayed from the spray pipe 5 and the flushing pipe 7, the flue gas passes through the absorption tray 4, the flow guide holes 11 on the tray plates 10 uniformly distribute the flue gas entering the treatment absorption tower to the whole cross section of the treatment absorption tower, the slurry sprayed from the spray pipe 5 and the flushing pipe 7 forms a liquid film in the flow guide holes 11 on the tray plates 10, the flue gas passes through the liquid layer from bottom to top, the flow guide holes 11 on the upper tray plate 10 are staggered with the flow guide holes 11 on the lower tray plate 10, so that the slurry and the flue gas are fully contacted, the absorption of sulfur dioxide is more sufficient, and the desulfurization efficiency can be improved; the flue gas continues to go upwards, the liquid droplets entrained in the flue gas are separated from the gas by centrifugal force or inertial force generated by the gas when passing through the blades of the demister 6, the multi-layer structure of the demister 6 forces the gas to change the flow direction, the liquid droplets are thrown to the surface of the corrugated plate due to the inertial effect, the slurry sprayed through the flushing pipe 7 makes the liquid droplets on the corrugated plate integrate into larger liquid droplets, finally, the larger liquid droplets flow down along the corrugated plate due to the gravity effect, and are gathered at the bottom of the treatment absorption tower, the slurry gathered at the bottom of the treatment absorption tower is stirred and supplied with oxygen by the oxygen supply stirring pipe 3, the slurry often contains solid particles (such as limestone particles, gypsum crystals and the like) after reaction, the stirring can prevent these particles from depositing at the bottom of the tower, keeps them in a suspended state in the slurry, is beneficial to the reaction, and the oxygen can accelerate the rate of chemical reaction, so that the reactants are more fully contacted and reacted, thereby improving the desulfurization efficiency.

[0021] The support frame 9 is detachably connected with the support seat 8 through bolts, and the tray plate 10 is further easy to replace; and the longitudinal plate is vertically arranged on the tray plate 10, so that the splashing frequency of the slurry is reduced.

[0022] As a technical optimization scheme of the utility model, the oxygen supply stirring pipe 3 comprises a rectangular pipe 14 and nozzles 15 arranged on the upper and lower outer walls of the rectangular pipe 14; driving rods 16 and oxygen supply pipes 17 are arranged on the left and right sides of the rectangular pipe 14 respectively; first motors 18 and oxygen supply machines 19 are arranged on the two sides below the treatment absorption tower respectively; the output end of the first motor 18 is fixedly connected with the other end of the driving rod 16 through a rotating shaft, and the output end of the oxygen supply machine 19 is communicated with the other end of the oxygen supply pipe 17 through a shaft coupling.

[0023] In the embodiment, the first motor 18 is started, and the oxygen supply stirring pipe 3 rotates, so that the gypsum slurry at the bottom of the treatment absorption tower is easily stirred, and the oxygen supply machine 19 is started, and oxygen is transported into the gypsum slurry at the bottom of the treatment absorption tower, so that the temperature rise of the matrix can be further reduced, the adhesion of limestone and other desulfurizing agents is reduced, the desulfurization process is more stable, the continuous operation capacity of the desulfurization tower is improved, and the reaction efficiency is improved.

[0024] As a technical optimization scheme of the utility model, the demister 6 can adopt a ridge type demister or a flat plate type demister.

[0025] In the embodiment, the demister 6 can adopt a ridge type demister or a flat plate type demister.

[0026] As a technical optimization scheme of the utility model, the oxygen supply stirring pipe 3 is provided with a reflux pipe 20, one end of the reflux pipe 20 is provided with a filter cover 21, the other end of the reflux pipe 20 is communicated with the input end of the suction pump 13, and the pipeline between the suction pump 13 and the slurry tank 12 and the pipeline of the reflux pipe 20 are both provided with control valves 22.

[0027] In the embodiment, the filter cover 21 plays a filtering role, avoids large gypsum in water from being sucked into the suction pump 13, closes the control valve 22 on the pipeline between the suction pump 13 and the slurry tank 12, opens the reflux pipe 20 on the reflux pipe 20, and can recycle and use the slurry in the absorption tower to reduce the waste of water resources.

[0028] As a technical optimization scheme of the utility model, the slurry tank 12 is provided with a feeding port 23 at the top, the slurry tank 12 is provided with a stirring paddle 24, the slurry tank 12 is provided with a second motor 25, and the output end of the second motor 25 is fixedly connected with the stirring paddle 24 through a rotating shaft.

[0029] In the embodiment, the lime powder is fed into the slurry tank 12 through the feeding port 23, an appropriate amount of water is heated in the slurry tank 12, the second motor 25 is started, and the stirring paddle 24 rotates, so that the water and the lime powder are uniformly mixed, and the reaction slurry is prepared.

[0030] As a technical optimization scheme of the utility model, the bottom of the treatment absorption tower is funnel-shaped, the treatment absorption tower is provided with a discharge pipe 26, and the discharge pipe 26 is provided with a discharge valve 27.

[0031] In the embodiment, the discharge valve 27 on the discharge pipe 26 is opened, the gypsum machine water formed at the bottom of the treatment absorption tower can be cleaned; one end of the discharge pipe 26 can be directly communicated with a gypsum dehydration system through a pipeline, a pump body is installed on the pipeline, the discharge valve 27 is opened, and the pump body is started, so that the gypsum slurry can be directly delivered to the gypsum dehydration system for dehydration.

[0032] Working principle: flue gas enters the processing absorption tower through the smoke inlet 1, the pump 13 is started, the pump 13 transports the slurry in the slurry tank 12 to the spray pipe 5 and the flushing pipe 7, the slurry is sprayed from the spray pipe 5 and the flushing pipe 7, the flue gas passes through the absorption tray 4, the flow guide hole 11 on the tray plate 10 uniformly distributes the flue gas entering the processing absorption tower to the whole processing absorption tower section, the slurry sprayed from the spray pipe 5 and the flushing pipe 7 forms a liquid film in the flow guide hole 11 on the tray plate 10, the flue gas passes through the liquid layer from bottom to top, so that the slurry and the flue gas are fully contacted, the absorption of sulfur dioxide is more sufficient, and the desulfurization efficiency can be improved; the flue gas continues to go upwards, the liquid droplets entrained in the flue gas are separated from the gas by the centrifugal force or inertial force generated by the gas when passing through the demister 6 blades, the multi-layer structure of the demister 6 makes the gas forced to change the flow direction, the liquid droplets are thrown to the corrugated plate surface due to inertia, the slurry sprayed through the flushing pipe 7 makes the liquid droplets on the corrugated plate integrate into larger liquid droplets, finally, the larger liquid droplets flow down along the corrugated plate due to gravity and are gathered at the bottom of the processing absorption tower, the oxygen stirring pipe 3 stirs and supplies oxygen to the slurry gathered at the bottom of the processing absorption tower, the slurry often contains solid particles after reaction, stirring can prevent these particles from depositing at the bottom of the tower, keeps them in a suspended state in the slurry, and the delivered oxygen can promote the oxidation process of sulfur dioxide, thereby improving the desulfurization efficiency.

[0033] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A desulfurization absorption tower with a porous tray, comprising a treatment absorption tower, a smoke inlet (1) and a smoke outlet (2) arranged on the treatment absorption tower, characterized in that: An oxygen supply stirring tube (3) is provided at the lower part of the treatment absorption tower, and an absorption tray (4) is provided above the oxygen supply stirring tube (3). The oxygen supply stirring tube (3) and the absorption tray (4) are respectively located below and above the smoke inlet (1); a spray pipe (5) is provided on the absorption tray (4), and a demister (6) is provided above the spray pipe (5). Flushing pipes (7) are provided on the upper and lower sides of the demister (6), and the nozzles of the upper and lower flushing pipes (7) are both oriented toward the demister (6); the absorption tray (4) includes a support seat (8), a support frame (9), and a tray plate (10); the support seat (8) and the support frame (9) are both in an annular structure, and the circumferential outer wall of the support seat (8) is fixedly connected to the circumferential inner wall of the treatment absorption tower. The support frame (9) is located above the support seat (8), and the support frame (9) is detachably connected to the support seat (8) by bolts. The tray plate (10) is arranged in the support frame (9), and a plurality of guide holes (11) are opened on the top of the tray plate (10). There are two tray plates (10), and the two are arranged up and down. The guide holes (11) of the upper tray plate (10) and the guide holes (11) on the lower tray plate (10) are staggered. A slurry tank (12) is provided on one side of the treatment absorption tower, and a pump (13) is provided on the slurry tank (12). The input end of the pump (13) is connected to the slurry tank (12) through a pipeline, and the output end of the pump (13) is connected to the spray pipe (5) and the flushing pipe (7) through pipelines.

2. A desulfurization absorption tower with a porous tray according to claim 1, characterized in that: The oxygen supply stirring tube (3) comprises a rectangular tube (14) and nozzles (15) arranged on the upper and lower outer walls of the rectangular tube (14); a driving rod (16) and an oxygen supply tube (17) are respectively arranged on the left and right sides of the rectangular tube (14); a first motor (18) and an oxygen supply machine (19) are respectively arranged on the two sides below the treatment absorption tower; the output end of the first motor (18) is fixedly connected to the other end of the driving rod (16) through a rotating shaft, and the output end of the oxygen supply machine (19) is connected to the other end of the oxygen supply tube (17) through a coupling.

3. The desulfurization absorption tower with a porous tray according to claim 1, characterized in that: The demister (6) may be a ridge-type demister or a flat-plate demister.

4. The desulfurization absorption tower with a porous tray according to claim 1, characterized in that: A return pipe (20) is provided above the oxygen supply stirring pipe (3), a filter cover (21) is provided at one end of the return pipe (20), the other end of the return pipe (20) is connected to the input end of the pump (13), and a control valve (22) is provided on the pipe between the pump (13) and the slurry tank (12) and on the return pipe (20).

5. The desulfurization absorption tower with a porous tray according to claim 1, characterized in that: A feeding port (23) is provided at the top of the slurry tank (12), a stirring paddle (24) is provided in the slurry tank (12), a second motor (25) is provided on the slurry tank (12), and an output end of the second motor (25) is fixedly connected to the stirring paddle (24) via a rotating shaft.

6. The desulfurization absorption tower with a porous tray according to claim 1, characterized in that: The bottom of the treatment absorption tower is funnel-shaped. A discharge pipe (26) is provided at the bottom of the treatment absorption tower, and a discharge valve (27) is provided on the discharge pipe (26).

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