CN216703935U

CN216703935U - SDS dry-process desulfurizing tower for high-dust industrial kiln flue gas desulfurization

Info

Publication number: CN216703935U
Application number: CN202220154089.7U
Authority: CN
Inventors: 姚磊; 贾纪强
Original assignee: Jiangsu Shiqing Environmental Protection Technology Co ltd
Current assignee: Jiangsu Shiqing Environmental Protection Technology Co ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-06-10
Anticipated expiration: 2032-01-20

Abstract

The utility model provides an SDS dry-process desulfurization tower for high-dust industrial kiln flue gas desulfurization, which comprises a feeding device, a desulfurizer storage system, a desulfurizer conveying system, an inlet flue, a tower bottom ash discharge system, a synergistic venturi system, a desulfurization tower body and an outlet flue. The lower end of the synergistic Venturi system is fixed with the tower bottom ash discharge system, and the synergistic Venturi systemThe upper end of the effective Venturi system is fixed on the desulfurizing tower body, and the upper end of the desulfurizing tower body is horizontally fixed on the side wall of the upper end of the desulfurizing tower body to form one end of the outlet flue. The utility model increases the contact chance of the desulfurizer and the flue gas, thereby playing the effect of synergistic desulfurization and being capable of efficiently and quickly removing SO in the flue gas₂The investment cost and the operation cost are reduced, the large-particle dust in the SDS dry-method desulfurizing tower is always in a fluidized state, and the phenomenon of dust deposition at the bottom of the tower can not occur.

Description

SDS dry-process desulfurizing tower for high-dust industrial kiln flue gas desulfurization

Technical Field

The utility model relates to a flue gas desulfurization technology, in particular to an SDS (sodium dodecyl sulfate) dry-method desulfurization tower for flue gas desulfurization of a high-dust industrial kiln.

Background

Along with the stricter and stricter environmental emission requirements, the pollution treatment intensity of enterprises is also increased continuously, and the treatment of the flue gas of the industrial kiln is also paid more and more attention. Dust and SO contained in the industrial kiln production process₂And the smoke of harmful substances such as NOx causes pollution to the environment. In an industrial kiln, particularly a lime kiln and a cement kiln, in the continuous production process of the kiln, due to the characteristics of the production process, the system has high flue gas temperature (more than or equal to 180 ℃) and high dust concentration (8-10 g/Nm)³）、SO₂The content is low, and SO can be generated only in some time₂The discharge concentration exceeds the standard. Under the condition, if a wet desulphurization system or a semi-dry desulphurization process system is adopted, the investment is large, the occupied area is large, and the system reaction is not sensitive enough (for example, the wet desulphurization system needs pulping, the semi-dry desulphurization system needs ash deposition and material returning, etc.); the flue gas temperature is high, and the flue gas needs to be cooled in the treatment process, so that the energy consumption and the operation cost are increased; the dust content in the flue gas is high, and the problems of dust deposition at the bottom of the desulfurization tower and the like can occur in the operation process of the straight cylinder type SDS desulfurization tower; the traditional SDS dry desulfurization system needs a grinder to grind baking soda into ultrafine powder, the grinder generally adopts an imported grinder, the equipment price is high, and the investment cost is increased. In order to meet the emission standard of the flue gas of the lime kiln and the cement kiln and better improve the quality of the atmospheric environment. Provides an SDS (sodium dodecyl sulfate) desulfurizing tower suitable for high-temperature and high-dust flue gas treatment, which can economically and rapidly reduce the SO in the flue gas in a lime kiln and a cement kiln₂。

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model provides the high-efficiency SDS desulfurizing tower which is applied to the high-temperature and high-dust flue gas treatment, has low investment and operation cost and can be put into use quickly.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a be used for high dust industrial furnace flue gas desulfurization SDS dry desulfurization tower, includes loading attachment, desulfurizer storage system, desulfurizer conveying system, entry flue, the ash discharge system at the bottom of the tower, increase effect venturi system, desulfurizing tower body and export flue. The loading attachment sets up the top of desulfurizer storage system, desulfurizer conveying system's one end is connected desulfurizer storage system, desulfurizer conveying system's the other end is connected the entry flue, the one end level of entry flue is fixed on the lateral wall of increase venturi system, the lower extreme of increase venturi system is fixed ash discharge system at the bottom of the tower, the upper end of increase venturi system is fixed the desulfurizing tower body, the level is fixed on the lateral wall of the upper end of desulfurizing tower body the one end of export flue.

Preferably, increase venturi system includes even cloth wind device, porous venturi and venturi flaring section, the lower extreme of even cloth wind device is fixed ash discharge system at the bottom of the tower, the side of even cloth wind device with the entry flue is put through mutually, the upper portion of even cloth wind device is fixed porous venturi's lower extreme, porous venturi's upper end is equipped with the venturi flaring section, the upper end of venturi flaring section is fixed the desulfurizing tower body.

Preferably, the air distribution device comprises an air distribution box and an air distribution plate, the upper end and the lower end of the air distribution box are provided with openings, the lower end of the air distribution box is fixed with the tower bottom ash discharge system, the upper end of the air distribution box is fixed with the lower end of the venturi flaring section, the upper end of the venturi flaring section is fixed with the desulfurizing tower body, a partition plate is horizontally fixed inside the air distribution box and divides the air distribution box into a lower chamber and an upper chamber, a through hole is formed in the middle of the partition plate, the lower end of the porous Venturi tube is fixed at the through hole on the upper surface of the partition plate, the porous Venturi tube is vertically arranged in the upper chamber, the upper end of the porous Venturi tube is flush with the upper end of the air distribution box, an inlet flue is fixed on the left side face of the air distribution box, the inlet flue is communicated with the lower chamber of the air distribution box, and the air distribution plate is arranged in the lower chamber, the air distribution plate is in a step shape and is arranged in a mode of ascending from the inlet flue to the direction far away from the inlet flue, the air distribution plate is adjacent to the air distribution plate, the air distribution plate is a strip-shaped plate and is vertically arranged, and two ends of the air distribution plate are fixed to the front side wall and the rear side wall of the air distribution box.

Preferably, loading attachment includes electric block and ton bag, electric block includes hoist mechanism and drive mechanism, the drive mechanism level sets up the desulfurizer storage system's top, hoist mechanism carries and hangs ton bag.

Preferably, the desulfurizer storage system comprises a bag opening station and a vulcanizing agent storage bin, the lower end of the bag opening station is connected with the vulcanizing agent storage bin, the bottom of the vulcanizing agent storage bin is conical, and a bin wall vibrator is fixed on the conical bottom of the vulcanizing agent storage bin.

Preferably, desulfurizer conveying system includes star type batcher, unloading pipe and prevents stifled jetting device, the entrance point of star type batcher through first pipeline with the lower extreme in vulcanizer warehouse links to each other, be equipped with the motorised valve on the first pipeline, the exit end of star type batcher is connected the one end of unloading pipe, the other end of unloading pipe is connected the entry flue, the side of unloading pipe still communicates the one end that has first branch pipe, the other end of first branch pipe is fixed prevent stifled jetting device.

Preferably, an inlet flue expansion joint is arranged in the middle of the inlet flue, and an outlet flue expansion joint is also arranged on the outlet flue.

Preferably, ash system is arranged including ash discharge box, star type ash discharge machine and ash discharge gate valve at the bottom of the tower, ash discharge box has the toper bottom, the toper bottom is fixed ash discharge gate valve and star type ash discharge machine.

Preferably, still include control system, control system includes the controller, the controller with motorised valve, star type batcher, prevent stifled jetting device, star type ash exhauster and arrange grey gate valve electricity and be connected.

Compared with the prior art, the utility model has the beneficial effects that: (1) the utility model is provided with the porous Venturi tube, and based on the fluidized bed principle, a dense phase area and a dilute phase area are formed in the desulfurizing tower, namely, high-concentration dust can appear in the desulfurizing tower bodyIn the dense phase region, dust and flue gas are fully contacted and mixed with the high-efficiency desulfurizer, the desulfurizer is attached to the surface of part of large-particle dust in the flue gas and repeatedly carries out fluidization movement in the desulfurizing tower, SO that the contact time of the desulfurizer and the flue gas is prolonged, the contact chance of the desulfurizer and the flue gas is increased, and the effect of efficiently removing SO2 is achieved; thereby playing the effect of synergistic desulfurization, and after the flue gas passes through the SDS dry desulfurization system and contacts and reacts with the high-efficiency desulfurizing agent, the SO in the flue gas is efficiently and quickly removed₂And finally, the emission concentration meets the requirement of ultralow emission: SO (SO)₂≤35mg/Nm³. (2) The inlet flue of the utility model is connected with the lime/cement rotary kiln, the process flue gas temperature of the lime/cement rotary kiln is 180-250 ℃, and the SDS dry desulphurization process is adopted in the temperature section, so that the flue gas does not need to be cooled, the influence on the subsequent process is small, and the operation cost is reduced. (3) According to the utility model, through the combination of the porous Venturi tube and the Venturi flared section, after the dust in the flue gas is accelerated in the desulfurizing tower, the dust in the flue gas flows through the desulfurizing tower in an extreme time (about 0.4 s) and enters a subsequent process, only a small part of large-particle dust stays in the desulfurizing tower for fluidization motion, and the large-particle dust in the SDS dry desulfurizing tower is always in a fluidization state, so that the dust deposition at the bottom of the tower is reduced. (4) The utility model transports the ton bag filled with the high-efficiency desulfurizer to a bag opening station through a lifter, opens the ton bag, and the high-efficiency desulfurizer (baking soda) enters a desulfurizer storage bin for standby; the system does not need to be provided with a special superfine mill, and the sodium bicarbonate superfine powder is directly purchased to be used as a desulfurizer, so that the investment cost is reduced.

Drawings

FIG. 1 is a schematic structural diagram of an SDS dry desulfurization tower for high-dust industrial kiln flue gas desulfurization.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Referring to fig. 1, an SDS dry-process desulfurization tower for flue gas desulfurization of a high-dust industrial kiln according to an embodiment of the present invention includes a feeding device 1, a desulfurizing agent storage system 2, a desulfurizing agent conveying system 3, an inlet flue 4, a tower bottom ash discharge system 6, a synergistic venturi system 7, a desulfurization tower body 8, and an outlet flue 9. An inlet flue expansion joint 5 is arranged in the middle of the inlet flue 4, and an outlet flue expansion joint 10 is also arranged on the outlet flue 9. Loading attachment 1 sets up desulfurizer storage system 2's top, desulfurizer conveying system 3's one end is connected desulfurizer storage system 2, desulfurizer conveying system 2's the other end is connected entry flue 4, the one end level of entry flue 4 is fixed on the lateral wall of increase venturi system 7, the lower extreme of increase venturi system 7 is fixed ash discharge system 6 at the bottom of the tower, the upper end of increase venturi system 7 is fixed desulfurizing tower body 8, the level is fixed on the lateral wall of the upper end of desulfurizing tower body 8 the one end of export flue 9. The inlet flue 4 is connected with the lime/cement rotary kiln, the process flue gas temperature of the lime/cement rotary kiln is 180-250 ℃, an SDS dry desulphurization process is adopted in the temperature section, the flue gas does not need to be cooled, the influence on the subsequent process is small, and the operation cost is reduced. When the device is used, a desulfurizer is lifted to a desulfurizer storage system 2 through a feeding device 1 for storage, the desulfurizer is conveyed to an inlet flue 4 through a desulfurizer conveying system 3, the inlet flue 4 is communicated with flue gas, the flue gas with the desulfurizer enters a desulfurizing tower and is fully mixed with the desulfurizer through a synergistic venturi system 7, SO2 in the flue gas is removed through a desulfurizing tower body 8, and the flue gas containing powder, which is dried by absorbing acidic substances such as SO2, enters a bag-type dust collector from an outlet flue 9 for further desulfurization reaction and smoke purification.

Synergistic venturi system 7 includes even air distribution device 71, porous venturi 72 and venturi flaring section 73, the lower extreme of even air distribution device 71 is fixed ash discharge system 6 at the bottom of the tower, the side of even air distribution device 71 with entry flue 4 switches on mutually, the upper portion of even air distribution device 71 is fixed porous venturi 72's lower extreme, the upper end of porous venturi 72 is equipped with venturi flaring section 73, venturi flaring section 73's upper end is fixed desulfurizing tower body 8.

The porous Venturi tube 72 is arranged, based on the fluidized bed principle, a dense phase region and a dilute phase region are formed in the desulfurizing tower, namely the dense phase region with high-concentration dust can be formed in the desulfurizing tower body 8, the dust and the flue gas are fully contacted and mixed with the high-efficiency desulfurizing agent, the desulfurizing agent is attached to the surface of part of large-particle dust in the flue gas, and the fluidized motion is repeatedly carried out in the desulfurizing tower, SO that the contact time of the desulfurizing agent and the flue gas is prolonged, the contact chance of the desulfurizing agent and the flue gas is increased, and the effect of efficiently removing SO2 is achieved; thereby playing the role of enhancing the desulfurization.

The air distribution device 71 comprises an air distribution box 711 and an air distribution plate 712, the upper end and the lower end of the air distribution box 711 are open, the lower end of the air distribution box 711 is fixed with the ash discharge system 6 at the bottom of the tower, the upper end of the air distribution box 711 is fixed with the lower end of a venturi flaring section 73, the upper end of the venturi flaring section 73 is fixed with the desulfurizing tower body 8, a partition plate 713 is horizontally fixed inside the air distribution box 711, the partition plate 713 divides the air distribution box into a lower chamber and an upper chamber, a through hole is formed in the middle of the partition plate 713, the lower end of the porous venturi tube 72 is fixed at the through hole in the upper surface of the partition plate 713, the porous venturi tube 72 is vertically arranged in the upper chamber, the upper end of the porous venturi tube 72 is flush with the upper end of the air distribution box 711, an inlet flue 4 is fixed on the left side surface of the air distribution box 711, and the inlet flue 4 is communicated with the lower chamber of the air distribution box 711, be equipped with wind distribution plate 712 in the lower chamber, wind distribution plate 712 is the step form and rises from entry flue 4 to keeping away from the direction of entry flue 4 and arrange, and is adjacent equidistance sets up between wind distribution plate 712, wind distribution plate 712 is the strip shaped plate, the vertical setting of wind distribution plate 712, wind distribution plate 712's both ends are fixed on the preceding, the back lateral wall of wind distribution box 711. When the desulfurizing tower is used, flue gas enters the SDS desulfurizing tower through the inlet flue, and then enters the porous Venturi tube 72 after being uniformly distributed through the air distribution plate 712, and then enters the desulfurizing tower body 8 and finally enters the next system.

The combination of the multi-hole venturi tube 72 and the venturi flared section 73 ensures that the dust in the flue gas flows through the desulfurization tower in an extreme time (about 0.4 s) and enters a subsequent process after accelerating in the desulfurization tower, and only a small part of larger particle dust stays in the desulfurization tower for fluidization motion, thereby reducing dust deposition at the bottom of the tower.

Loading attachment 1 includes electric block 11 and ton bag 12, electric block 11 includes hoisting mechanism 111 and drive mechanism 112, drive mechanism 112 level sets up desulfurizer storage system 2's top, hoisting mechanism 111 is carried and is hung ton bag 12. The ton bag 12 is transported to the desulfurizing agent storage system 2 using the electric hoist 11.

Desulfurizer storage system 2 is including opening bag station 21 and vulcanizer warehouse 22, open the lower extreme of bag station 21 with vulcanizer warehouse 22 links to each other, the bottom of vulcanizer warehouse 22 is the toper, makes things convenient for the baking soda to collect in the bottom, convenient discharge, fixed bulkhead rapping device 23 on the outside of vulcanizer warehouse 22's toper bottom, discharges the baking soda in vulcanizer warehouse 22 completely, avoids leaving over desulfurizer baking soda in the vulcanizer warehouse 22, can't discharge, causes the waste of desulfurizer. Transporting the ton bag 12 filled with the high-efficiency desulfurizer to a bag opening station 21 through an electric hoist 11, opening the ton bag 12, and feeding the high-efficiency desulfurizer (baking soda) into a desulfurizer storage bin 22 for later use; the system does not need to be provided with a special superfine mill, and the sodium bicarbonate superfine powder is directly purchased to be used as a desulfurizer, so that the investment cost is reduced.

The desulfurizer conveying system 3 comprises a star-shaped feeder 31, a discharging pipe 32 and an anti-blocking blowing device (not shown in the figure), wherein the inlet end of the star-shaped feeder 31 is connected with the lower end of the vulcanizing agent storage bin 22 through a first pipeline 33, an electric valve 331 is arranged on the first pipeline 33, the outlet end of the star-shaped feeder 31 is connected with one end of the discharging pipe 32, the other end of the discharging pipe 32 is connected with the inlet flue 4, the side surface of the discharging pipe 32 is also communicated with one end of a first branch pipe 34, and the other end of the first branch pipe 34 is fixed with the anti-blocking blowing device. Through the desulfurizer feeding system 3 and the uniform distribution device, the high-efficiency desulfurizer is sprayed into the inlet flue 4 of the SDS desulfurization tower through the anti-blocking blowing device and enters the desulfurization tower. The desulfurizer is thermally activated in the absorption tower, the specific surface area is rapidly increased, the desulfurizer is fully contacted with the kiln flue gas to generate physical and chemical reactions, and acidic substances such as SO2 in the flue gas are absorbed and purified.

Ash system 6 is arranged including ash discharging box 61, star type ash discharging machine 62 and ash discharging gate valve 63 to the tower bottom, ash discharging box 61 has the toper bottom, the toper bottom is fixed ash discharging gate valve 63 and star type ash discharging machine 62. The accumulated dust at the bottom of the desulfurizing tower is discharged out of the equipment in time, and the amount of dust particles in the desulfurizing tower is reduced.

Still include control system (not drawn in the figure), control system includes the controller, the controller with motorised valve 331, star type batcher 31, prevent stifled jetting device, star type ash exhauster 62 and arrange grey slide valve 63 electricity and be connected. The equipment is conveniently opened through a control system, the automatic conveying and ash discharging processes are carried out, and the automation degree of the equipment is improved.

The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the utility model. Rather, it is intended that the utility model be covered by the appended claims without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a be used for high dust industrial kiln flue gas desulfurization SDS dry desulfurization tower which characterized in that: the system comprises a feeding device, a desulfurizer storage system, a desulfurizer conveying system, an inlet flue, a tower bottom ash discharge system, a synergistic Venturi system, a desulfurizing tower body and an outlet flue; the loading attachment sets up the top of desulfurizer storage system, desulfurizer conveying system's one end is connected desulfurizer storage system, desulfurizer conveying system's the other end is connected the entry flue, the one end level of entry flue is fixed on the lateral wall of increase venturi system, the lower extreme of increase venturi system is fixed ash discharge system at the bottom of the tower, the upper end of increase venturi system is fixed the desulfurizing tower body, the level is fixed on the lateral wall of the upper end of desulfurizing tower body the one end of export flue.

2. The SDS dry desulfurization tower for flue gas desulfurization of high-dust industrial kilns as set forth in claim 1, wherein: the synergistic venturi system includes even cloth wind device, porous venturi and venturi flaring section, the lower extreme of even cloth wind device is fixed ash discharge system at the bottom of the tower, the side of even cloth wind device with the entry flue is put through mutually, the upper portion of even cloth wind device is fixed porous venturi's lower extreme, porous venturi's upper end is equipped with the venturi flaring section, the upper end of venturi flaring section is fixed the desulfurizing tower body.

3. The SDS dry desulfurization tower for flue gas desulfurization of high-dust industrial kilns as set forth in claim 2, wherein: the air distribution device comprises an air distribution box and an air distribution plate, the upper end and the lower end of the air distribution box are openings, the lower end of the air distribution box is fixed with the ash discharge system at the bottom of the tower, the lower end of the venturi flaring section is fixed at the upper end of the venturi flaring section, the desulfurizing tower body is fixed at the upper end of the venturi flaring section, a partition plate is fixed at the inner level of the air distribution box, the partition plate divides the air distribution box into a lower chamber and an upper chamber, a through hole is formed in the middle of the partition plate, the lower end of the porous Venturi tube is fixed at the through hole on the upper surface of the partition plate, the porous Venturi tube is vertically arranged in the upper chamber, the upper end of the porous Venturi tube is flush with the upper end of the air distribution box, an inlet flue is fixed on the left side of the air distribution box, the inlet flue is communicated with the lower chamber of the air distribution box, and the air distribution plate is arranged in the lower chamber, the air distribution plate is in a step shape and is arranged in a mode of ascending from the inlet flue to the direction far away from the inlet flue, the air distribution plate is adjacent to the air distribution plate, the air distribution plate is a strip-shaped plate and is vertically arranged, and two ends of the air distribution plate are fixed to the front side wall and the rear side wall of the air distribution box.

4. The SDS dry desulfurization tower for high-dust industrial kiln flue gas desulfurization according to claim 1, characterized in that: the feeding device comprises an electric hoist and a ton bag, the electric hoist comprises a hoisting mechanism and a transmission mechanism, the transmission mechanism is horizontally arranged above the desulfurizer storage system, and the hoisting mechanism is used for lifting the ton bag.

5. The SDS dry desulfurization tower for flue gas desulfurization of high-dust industrial kilns as set forth in claim 1, wherein: the desulfurizer storage system comprises a bag opening station and a vulcanizing agent storage bin, the lower end of the bag opening station is connected with the vulcanizing agent storage bin, the bottom of the vulcanizing agent storage bin is conical, and a bin wall vibrator is fixed on the conical bottom of the vulcanizing agent storage bin.

6. The SDS dry desulfurization tower for flue gas desulfurization of high-dust industrial kilns as set forth in claim 5, wherein: the desulfurizer conveying system comprises a feeder, a discharging pipe and an anti-blocking blowing device, wherein the inlet end of the feeder is connected with the lower end of the vulcanizing agent storage bin through a first pipeline, an electric valve is arranged on the first pipeline, the outlet end of the feeder is connected with one end of the discharging pipe, the other end of the discharging pipe is connected with the inlet flue, the side surface of the discharging pipe is also communicated with one end of a first branch pipe, and the other end of the first branch pipe is fixed with the anti-blocking blowing device.

7. The SDS dry desulfurization tower for high-dust industrial kiln flue gas desulfurization according to claim 1, characterized in that: and an inlet flue expansion joint is arranged in the middle of the inlet flue, and an outlet flue expansion joint is also arranged on the outlet flue.

8. The SDS dry desulfurization tower for high-dust industrial kiln flue gas desulfurization according to claim 6, characterized in that: the ash system of arranging at bottom of the tower includes ash discharging box, ash discharging machine and ash discharging gate valve, the ash discharging box has the toper bottom, the toper bottom is fixed ash discharging gate valve and ash discharging machine.

9. The SDS dry desulfurization tower for high-dust industrial kiln flue gas desulfurization according to claim 8, characterized in that: still include control system, control system includes the controller, the controller with motorised valve, batcher, prevent stifled jetting device, ash exhauster and ash discharge gate valve electricity and be connected.