阅读说明：本技术 一种用于烟气脱硫脱硝的余热回收系统 (Waste heat recovery system for flue gas desulfurization and denitrification ) 是由 谢继东 张卫东 于 2021-08-30 设计创作，主要内容包括：本发明提供了一种用于烟气脱硫脱硝的余热回收系统,其特征在于：包括预处理箱体、烟气输送箱体、喷淋处理塔、回收箱体和换热管道,所述的预处理箱体内设置有第一活性炭存储座,所述的喷淋处理塔内设置有第二活性炭存储座,所述的第一活性炭存储座和所述的第二活性炭存储座内都开设有上下贯通的用于存储活性炭的存储通道,所述的第二活性炭存储座下方的喷淋处理塔内设置有栅格限制板。本设计中的第一烟气输送管道和第二烟气输送管道都是由若干根特斯拉阀管首尾相连所组成,通过特斯拉阀管的特殊式结构加快了烟气的输送速度,减少了热量在输送过程中的损耗。(The invention provides a waste heat recovery system for flue gas desulfurization and denitration, which is characterized in that: including preliminary treatment box, flue gas transport box, spray treatment tower, recovery box and heat transfer pipeline, preliminary treatment box in be provided with first active carbon storage seat, spray treatment tower in be provided with second active carbon storage seat, first active carbon storage seat with second active carbon storage seat in all set up the storage passageway that is used for saving the active carbon that link up from top to bottom, second active carbon storage seat below spray treatment tower in be provided with the grid limiting plate. First flue gas pipeline and second flue gas pipeline in this design all constitute by a plurality of tesla valve pipe end to end, have accelerated the conveying speed of flue gas through the special formula structure of tesla valve pipe, have reduced the loss of heat in transportation process.)

1. The utility model provides a waste heat recovery system for flue gas desulfurization denitration which characterized in that: comprises a pretreatment box body (1), a flue gas conveying box body (5), a spray treatment tower (11), a recovery box body (26) and a heat exchange pipeline (25), wherein a first activated carbon storage seat (2) is arranged in the pretreatment box body, a second activated carbon storage seat (12) is arranged in the spray treatment tower, a storage channel which is used for storing activated carbon and is communicated up and down is arranged in the first activated carbon storage seat and the second activated carbon storage seat, a grid limiting plate (22) is arranged in the spray treatment tower below the second activated carbon storage seat, the grid limiting plate is horizontally arranged and is contacted with the bottom of the second activated carbon storage seat, the activated carbon in the storage channel is limited in the activated carbon storage seat through the grid limiting plate, flue gas can pass through the grid limiting plate to enter the storage channel, and the pretreatment box body and the flue gas conveying box body are connected into a whole up and down, the top of the flue gas conveying box body is rotationally connected with a sealing bottom plate (29), the sealing bottom plate is positioned under the first active carbon storage seat and limits the active carbon in the first active carbon storage seat to enable the active carbon to stay in a storage channel of the first active carbon storage seat, a plurality of filter holes for flue gas to pass through are further formed in the sealing bottom plate, a first flue gas conveying pipeline (4) is connected to the side wall of the pretreatment box body above the first active carbon storage seat, the pretreatment box body is communicated with the combustion furnace through the first flue gas conveying pipeline, a second flue gas conveying pipeline (10) is arranged on the side wall of the flue gas conveying box body, the second flue gas conveying pipeline is communicated with the side wall of the lower end of the spray treatment tower, and the recovery box body is arranged under the spray treatment tower and is communicated with a water outlet at the bottom of the spray treatment tower, the heat exchange pipeline penetrates through the recovery box body, one section of the heat exchange pipeline positioned in the recovery box body is in a spiral shape, and a discharge pipeline (27) is further connected to the side wall of the lower end of the recovery box body.

2. The waste heat recovery system for flue gas desulfurization and denitration according to claim 1, characterized in that: the top of preliminary treatment box is provided with rather than first hopper (16) that are linked together, first hopper link to each other with first active carbon storehouse (3) that is located directly over it, activated carbon in the first active carbon storehouse is gone into the storage channel of first active carbon storage seat through first hopper and is supplemented in, the top that sprays the treatment tower also is provided with second hopper (21) that are linked together rather than, the second hopper link to each other with second active carbon storehouse (20) that is located directly over it, activated carbon in the second active carbon storehouse is gone into the storage channel of second active carbon storage seat through the second hopper and is supplemented in.

3. The waste heat recovery system for flue gas desulfurization and denitration according to claim 2, characterized in that: a spray pipeline (23) is also arranged in the desulfurizing tower below the limiting grid plate, two or more than two spray pipelines are sequentially arranged in the desulfurizing tower from top to bottom, a purified flue gas outlet (15) is arranged on the side wall of the desulfurizing tower above the desulfurizing seat, the outer wall of the desulfurizing tower above the desulfurizing seat is also respectively provided with a sulfur-containing gas outlet (17), a cold air inlet (14) and a hot air inlet (18), a cold air outlet (19) and a hot air outlet (13) are respectively arranged on the outer wall of the desulfurizing tower between the desulfurizing seat and the spraying pipeline, the side wall of the desulfurizing tower below the spraying pipeline is also provided with a nitrogen inlet and an ammonia inlet, the hot air inlet is connected with a hot air delivery pipeline 24 which passes through the recovery box body and a section of the hot air delivery pipeline in the recovery box body is also in a spiral shape.

4. The waste heat recovery system for flue gas desulfurization and denitration according to claim 1, characterized in that: one end of the sealing bottom plate is connected with the rotating shaft through a connecting piece (23), the rotating shaft is connected with the servo motor, the sealing bottom plate swings around the rotating shaft through the driving servo motor, the other end of the sealing bottom plate is movably connected to the top wall in the flue gas conveying box body, an electric cylinder (32) is further installed on the side wall of the flue gas conveying box body, the electric cylinder is connected with a clamping plate (31), the clamping plate extends to the lower part of the sealing bottom plate through the driving of the electric cylinder, and the sealing bottom plate is clamped and limited through the top wall in the flue gas conveying box body and the upper part and the lower part of the clamping plate.

5. The waste heat recovery system for flue gas desulfurization and denitration according to claim 4, characterized in that: the bottom center in the flue gas conveying box is also provided with an arc-shaped bulge (40), the front end and the rear end of the arc-shaped bulge are respectively contacted with the front side wall and the rear side wall in the flue gas conveying box, the sealing bottom plate is driven by a servo motor to be contacted with the arc-shaped bulge, the bottom of the flue gas conveying box on the left side of the arc-shaped bulge is provided with an activated carbon discharge hole, an electromagnetic sealing valve (6) is arranged at the activated carbon discharge hole, the flue gas conveying box is communicated with a heat recovery box (28) right below the flue gas conveying box through the activated carbon discharge hole, the left side and the right side of the heat recovery box are respectively provided with a first side plate (7) and a second side plate (8), the heat recovery box is rotationally connected with a heating barrel (30), the left end of the heating barrel extends out of the heat recovery box and is rotationally connected to the first side plate through a first rotating shaft (36), the other end of heating barrel link to each other with hollow rotating shaft (35), hollow rotating shaft stretch out heat recovery box and rotate and connect at the second curb plate, the one end of hollow rotating shaft links to each other with the inside of heating barrel, the other end of hollow rotating shaft is linked together with force pump (9) of fixing on the second curb plate, force pump link to each other with the heating tube who passes the recovery box again, the discharge gate has been seted up on the lateral wall that heating barrel stretches out heat recovery box one end.

6. The waste heat recovery system for flue gas desulfurization and denitration according to claim 5, characterized in that: a plurality of turning plates (37) are uniformly arranged on the outer wall of the heating cylinder body in the heat recovery box body, and the activated carbon in the heat recovery box body is turned over in the rotating process of the heating cylinder body through the turning plates.

7. The waste heat recovery system for flue gas desulfurization and denitration according to claim 5, characterized in that: the right side wall of the lower end of the heat recovery box body is provided with an active carbon discharge port (28-1), the active carbon discharge port is provided with a second electromagnetic switch valve, a spiral conveyor (38) is further arranged in the heat recovery box body below the heating cylinder body, the left end of the spiral conveyor is connected with a second servo motor (39), and the right end of the spiral conveyor stretches into the active carbon discharge port.

8. The waste heat recovery system for flue gas desulfurization and denitration according to claim 5, characterized in that: the top of the heat recovery box body is also connected with a shunt pipeline (34), and the shunt pipeline and the hot air inlet (18) are connected with a hot air conveying pipeline.

9. The waste heat recovery system for flue gas desulfurization and denitration according to claim 1, characterized in that: the first flue gas conveying pipeline and the second flue gas conveying pipeline are formed by connecting a plurality of Tesla valve pipes (41) end to end, and the outer sides of the Tesla valve pipes are wrapped with heat preservation sponges.

Technical Field

The invention relates to the technical field of flue gas desulfurization and denitration, in particular to a waste heat recovery system for flue gas desulfurization and denitration.

Background

In the production process of iron ore agglomeration or coal combustion power generation, the sulfur part in the material can be oxidized to generate sulfur dioxide or sulfur trioxide to enter flue gas. In order to meet the latest national ultra-low emission standard, a wet desulfurization process with high desulfurization efficiency is usually adopted to perform desulfurization and denitrification on flue gas, the flue gas has great heat after being discharged from a combustion furnace, and if the flue gas is directly discharged after desulfurization and denitrification, the energy loss is greatly caused, so that the design of a waste heat recovery system for flue gas desulfurization and denitrification is particularly important for solving the problem.

Disclosure of Invention

The invention provides a waste heat recovery system for flue gas desulfurization and denitration, wherein a first flue gas conveying pipeline and a second flue gas conveying pipeline are formed by connecting a plurality of Tesla valve pipes end to end, the conveying speed of flue gas is accelerated through the special structure of the Tesla valve pipes, and the loss of heat in the conveying process is reduced, so that less energy is consumed in the process of heat exchange of substances in a heating cylinder body and the heating pipe, and the effects of saving resources and reducing energy waste are achieved.

In order to solve the technical problem, the invention provides a waste heat recovery system for flue gas desulfurization and denitration, which is characterized in that: including preliminary treatment box, flue gas transport box, spray treatment tower, recovery box and heat transfer pipeline, preliminary treatment box in be provided with first active carbon storage seat, spray treatment tower in be provided with second active carbon storage seat, first active carbon storage seat with second active carbon storage seat in all set up the storage passageway that is used for saving the active carbon that link up from top to bottom, spray treatment tower of second active carbon storage seat below in be provided with the grid limiting plate, the grid limiting plate level place and contact with the bottom of second active carbon storage seat, storage passageway in the active carbon pass through the grid limiting plate restriction in the active carbon storage seat, in the flue gas can pass the grid limiting plate and get into storage passageway, preliminary treatment box and flue gas transport box link into an organic whole from top to bottom, the top of flue gas transport box is connected with sealing bottom plate, the sealing bottom plate is positioned under the first activated carbon storage seat and limits the activated carbon in the first activated carbon storage seat to enable the activated carbon to stay in a storage channel of the first activated carbon storage seat, a plurality of filter holes for smoke to pass through are further formed in the sealing bottom plate, a first smoke conveying pipeline is connected to the side wall of the pretreatment box body above the first activated carbon storage seat, the pretreatment box body is communicated with the combustion furnace through the first smoke conveying pipeline, a second smoke conveying pipeline is arranged on the side wall of the smoke conveying box body and is communicated with the side wall of the lower end of the spray treatment tower, the recovery box body is arranged under the spray treatment tower and is communicated with a water outlet at the bottom of the spray treatment tower, and the heat exchange pipeline penetrates through the recovery box body and is in a spiral shape at one section positioned in the recovery box body, and the side wall of the lower end of the recovery box body is also connected with a discharge pipeline.

Further: the top of preliminary treatment box is provided with the first hopper rather than being linked together, first hopper link to each other with the first active carbon storehouse that is located directly over it, activated carbon in the first active carbon storehouse is gone into the storage channel of first active carbon storage seat through first hopper and is supplemented in, the top of spray treatment tower also is provided with the second hopper rather than being linked together, the second hopper link to each other with the second active carbon storehouse that is located directly over it, activated carbon in the second active carbon storehouse is gone into the storage channel of second active carbon storage seat through the second hopper and is supplemented in.

And further: the desulfurizing tower of restriction grid plate below in still be provided with spray piping, the desulfurizing tower in from the top down set gradually two or more spray piping, the lateral wall of desulfurizing tower of desulfurization seat top on seted up and purified flue gas outlet, the outer wall of desulfurizing tower of desulfurization seat top on still seted up sour gas outlet, cold wind entry and hot-blast entry respectively, the outer wall of desulfurizing tower between desulfurization seat and the spray piping on still seted up cold wind export and hot-blast outlet respectively, the lateral wall of desulfurizing tower of spray piping below on still seted up nitrogen gas import and ammonia import, hot-blast entry links to each other with hot-blast delivery pipeline, hot-blast delivery pipeline pass the recovery box and its one section in the recovery box also is the heliciform.

And further: one end of the sealing bottom plate is connected with the rotating shaft through a connecting piece, the rotating shaft is connected with the servo motor, the sealing bottom plate swings around the rotating shaft through the driving servo motor, the other end of the sealing bottom plate is movably connected to the top wall in the flue gas conveying box body, the side wall of the flue gas conveying box body is further provided with an electric cylinder, the electric cylinder is connected with the clamping plate, the clamping plate extends to the lower part of the sealing bottom plate through the driving of the electric cylinder, and the sealing bottom plate is clamped and limited through the top wall in the flue gas conveying box body and the upper part and the lower part of the clamping plate.

And further: the bottom center in the flue gas conveying box is also provided with an arc-shaped bulge, the front end and the rear end of the arc-shaped bulge are respectively contacted with the front side wall and the rear side wall in the flue gas conveying box, the sealing bottom plate is contacted with the arc-shaped bulge through a servo motor driven rotating shaft, an activated carbon discharge port is formed in the bottom of the flue gas conveying box on the left side of the arc-shaped bulge, an electromagnetic sealing valve is installed at the activated carbon discharge port, the flue gas conveying box is communicated with a heat recovery box under the flue gas conveying box through the activated carbon discharge port, a first side plate and a second side plate are respectively arranged on the left side and the right side of the heat recovery box, a heating barrel is rotationally connected in the heat recovery box, the left end of the heating barrel extends out of the heat recovery box and is rotationally connected onto the first side plate through the first rotating shaft, and the other end of the heating barrel is connected with the hollow rotating shaft, the hollow rotating shaft stretches out the heat recovery box body to be connected to the second side plate in a rotating mode, one end of the hollow rotating shaft is connected with the inside of the heating cylinder body, the other end of the hollow rotating shaft is communicated with a pressure pump fixed to the second side plate, the pressure pump is connected with a heating pipeline penetrating through the recovery box body, and a discharge hole is formed in the side wall, extending out of one end of the heat recovery box body, of the heating cylinder body.

And further: the outer wall of the heating cylinder in the heat recovery box body is evenly provided with a plurality of turning plates, and the active carbon in the heat recovery box body is turned over in the rotating process of the heating cylinder body through the turning plates.

And further: the right side wall of the lower end of the heat recovery box body is provided with an activated carbon discharge port, the activated carbon discharge port is provided with a second electromagnetic switch valve, a spiral conveyor is further arranged in the heat recovery box body below the heating cylinder body, the left end of the spiral conveyor is connected with a second servo motor, and the right end of the spiral conveyor stretches into the activated carbon discharge port.

And the top of the heat recovery box body is also connected with a shunt pipeline, and the shunt pipeline and the hot air inlet are connected with a hot air conveying pipeline.

And further: the first flue gas conveying pipeline and the second flue gas conveying pipeline are formed by connecting a plurality of Tesla valve pipes end to end, and heat preservation sponges wrap the outer sides of the Tesla valve pipes.

After the structure is adopted, the first flue gas conveying pipeline and the second flue gas conveying pipeline are formed by connecting a plurality of Tesla valve pipes end to end, the conveying speed of flue gas is accelerated through the special structure of the Tesla valve pipes, and the loss of heat in the conveying process is reduced; in addition, the invention can also regenerate and supplement the activated carbon in the spray treatment tower and replace the activated carbon in the pretreatment tank body, thereby always ensuring the treatment efficiency of the activated carbon and greatly increasing the practical performance.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a view showing a part of fig. 1.

FIG. 3 is a block diagram of a Tesla valve tube.

Detailed Description

As shown in fig. 1, a waste heat recovery system for flue gas desulfurization and denitration comprises a pretreatment tank body 1, a flue gas conveying tank body 5, a spray treatment tower 11, a recovery tank body 26 and a heat exchange pipeline 25, wherein a first activated carbon storage seat 2 is arranged in the pretreatment tank body, a second activated carbon storage seat 12 is arranged in the spray treatment tower, a storage channel which is used for storing activated carbon and is communicated up and down is arranged in each of the first activated carbon storage seat and the second activated carbon storage seat, a grid limiting plate 22 is arranged in the spray treatment tower below the second activated carbon storage seat, the grid limiting plate is horizontally arranged and is contacted with the bottom of the second activated carbon storage seat, activated carbon in the storage channel is limited in the activated carbon storage seat through the grid limiting plate, and flue gas can pass through the grid limiting plate and enter the storage channel, the pretreatment box body and the flue gas conveying box body are vertically connected into a whole, the top of the flue gas conveying box body is rotationally connected with a sealing bottom plate 29, the sealing bottom plate is positioned under a first activated carbon storage seat and limits activated carbon in the first activated carbon storage seat to enable the activated carbon to stay in a storage channel of the first activated carbon storage seat, the sealing bottom plate is also provided with a plurality of filter holes for flue gas to pass through, the side wall of the pretreatment box body above the first activated carbon storage seat is connected with a first flue gas conveying pipeline 4, the pretreatment box body is communicated with a combustion furnace through the first flue gas conveying pipeline, the side wall of the flue gas conveying box body is provided with a second flue gas conveying pipeline 10, the second flue gas conveying pipeline is communicated with the side wall at the lower end of a spray treatment tower, the recovery box body is arranged under the spray treatment tower and is communicated with a water outlet at the bottom of the spray treatment tower, the heat exchange pipeline penetrates through the recovery box body, one section of the heat exchange pipeline positioned in the recovery box body is in a spiral shape, and a discharge pipeline 27 is further connected to the side wall of the lower end of the recovery box body.

The top of the pretreatment box body shown in fig. 1 and 2 is provided with a first hopper 16 communicated with the pretreatment box body, the first hopper is connected with a first activated carbon bin 3 positioned right above the first hopper, activated carbon in the first activated carbon bin is discharged into a storage channel of a first activated carbon storage seat through the first hopper for supplement, the top of the spray treatment tower is also provided with a second hopper 21 communicated with the spray treatment tower, the second hopper is connected with a second activated carbon bin 20 positioned right above the second hopper, and activated carbon in the second activated carbon bin is discharged into a storage channel of a second activated carbon storage seat through the second hopper for supplement. The desulfurization tower below the limiting grid plate is internally provided with a spray pipeline 23, the desulfurization tower is internally provided with two or more spray pipelines from top to bottom in sequence, the side wall of the desulfurization tower above the desulfurization seat is provided with a purified flue gas outlet 15, the outer wall of the desulfurization tower above the desulfurization seat is provided with a sulfur-containing gas outlet 17, a cold air inlet 14 and a hot air inlet 18 respectively, the outer wall of the desulfurization tower between the desulfurization seat and the spray pipelines is provided with a cold air outlet 19 and a hot air outlet 13 respectively, the side wall of the desulfurization tower below the spray pipelines is provided with a nitrogen inlet and an ammonia inlet, the hot air inlet is connected with a hot air conveying pipeline 24, and the hot air conveying pipeline penetrates through the recovery box body and is also in a spiral shape at one section in the recovery box body. The invention can also regenerate and supplement the activated carbon in the spray treatment tower and replace the activated carbon in the pretreatment box body, thereby always ensuring the treatment efficiency of the activated carbon and greatly increasing the practical performance; and the spiral design prolongs the heat exchange time. .

As shown in fig. 1 and 2, the one end of the sealing bottom plate is connected with the rotating shaft through a connecting piece 23, the rotating shaft is connected with a servo motor, the sealing bottom plate swings around the rotating shaft through a driving servo motor, the other end of the sealing bottom plate is movably connected to the top wall in the flue gas conveying box body, an electric cylinder 32 is further installed on the side wall of the flue gas conveying box body, the electric cylinder is connected with a clamping plate 31, the clamping plate extends to the lower part of the sealing bottom plate through the driving of the electric cylinder, and the sealing bottom plate is limited through the upper and lower clamping of the top wall in the flue gas conveying box body and the clamping plate.

As shown in fig. 2, an arc-shaped protrusion 40 is further arranged at the center of the bottom in the flue gas conveying box, the front end and the rear end of the arc-shaped protrusion are respectively contacted with the front side wall and the rear side wall in the flue gas conveying box, the sealing bottom plate is driven by a servo motor to be contacted with the arc-shaped protrusion, an activated carbon discharge port is formed in the bottom of the flue gas conveying box on the left side of the arc-shaped protrusion, an electromagnetic sealing valve 6 is installed at the activated carbon discharge port, the flue gas conveying box is communicated with a heat recovery box 28 under the flue gas conveying box through the activated carbon discharge port, a first side plate 7 and a second side plate 8 are respectively arranged on the left side and the right side of the heat recovery box, a heating barrel 30 is rotatably connected in the heat recovery box, the left end of the heating barrel extends out of the heat recovery box and is rotatably connected to the first side plate through a first rotating shaft 36, and the other end of the heating barrel is connected to a hollow rotating shaft 35, the hollow rotating shaft stretches out the heat recovery box body and is connected to the second side plate in a rotating mode, one end of the hollow rotating shaft is connected with the inside of the heating cylinder body, the other end of the hollow rotating shaft is communicated with a pressure pump 9 fixed to the second side plate, the pressure pump is connected with a heating pipeline penetrating through the recovery box body, and a discharge hole is formed in the side wall, extending out of one end of the heat recovery box body, of the heating cylinder body.

Still evenly be provided with a plurality of on the outer wall of the heating barrel in the heat recovery box shown in fig. 2 and turn over board 37, turn over the active carbon in the heat recovery box at the rotatory in-process of heating barrel through turning over the board to make more active carbon that receive the flue gas heating contact with the heating barrel, improved the utilization ratio of the energy.

As shown in fig. 2, an activated carbon discharge port 28-1 is formed in the right side wall of the lower end of the heat recovery box body, a second electromagnetic switch valve is installed at the activated carbon discharge port, a screw conveyor 38 is further arranged in the heat recovery box body below the heating cylinder body, the left end of the screw conveyor is connected with a second servo motor 39, and the right end of the screw conveyor extends into the activated carbon discharge port.

The top of the heat recovery tank as shown in figure 2 is also connected to a diversion duct 34 which is connected to the hot air supply duct both to the hot air inlet 18.

The first flue gas conveying pipeline and the second flue gas conveying pipeline shown in fig. 1 and 3 are both formed by connecting a plurality of tesla valve pipes 41 end to end, and the outer sides of the tesla valve pipes are wrapped with heat insulation sponges. The first flue gas conveying pipeline and the second flue gas conveying pipeline are formed by connecting a plurality of Tesla valve pipes end to end, the conveying speed of flue gas is accelerated through the special structure of the Tesla valve pipes, and the loss of heat in the conveying process is reduced; therefore, less energy is consumed in the process of exchanging heat of the substances in the heating cylinder body and the heating pipe, and the effects of saving resources and reducing energy waste are achieved.